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Ordering number : EN6144
CMOS IC
LC75817E, 75817W
1/8 to 1/10 Duty Dot Matrix LCD Display Controller/Driver with Key Input Function
Overview
The LC75817E and LC75817W are 1/8 to 1/10 duty dot matrix LCD display controller/drivers that supports the display of characters, numbers, and symbols. In addition to generating dot matrix LCD drive signals based on data transferred serially from a microcontroller, the LC75817E and LC75817W also provide on-chip character display ROM and RAM to allow display systems to be implemented easily. These products also provide up to 4 general-purpose output ports and incorporate a key scan circuit that accepts input from up to 30 keys to reduce printed circuit board wiring.
* Built-in display contrast adjustment circuit * Up to 4 general-purpose output ports are included. * Serial data I/O supports CCB format communication with the system controller. * Independent LCD drive block power supply VLCD * A voltage detection type reset circuit is provided to initialize the IC and prevent incorrect display. * The INH pin is provided. This pin turns off the display, disables key scanning, and forces the general-purpose output ports to the low level. * RC oscillator circuit
Features
* Key input function for up to 30 keys (A key scan is performed only when a key is pressed.) * Controls and drives a 5 x 7, 5 x 8, or 5 x 9 dot matrix LCD. * Supports accessory display segment drive (up to 60 segments) * Display technique: 1/8 duty 1/4 bias drive (5 x 7 dots) 1/9 duty 1/4 bias drive (5 x 8 dots) 1/10 duty 1/4 bias drive (5 x 9 dots) * Display digits: 12 digits x 1 line (5 x 7 dots, 5 x 8 dots) 11 digits x 1 line (5 x 9 dots) * Display control memory CGROM: 240 characters (5 x 7, 5 x 8, or 5 x 9 dots) CGRAM: 16 characters (5 x 7, 5 x 8, or 5 x 9 dots) ADRAM: 12 x 5 bits DCRAM: 48 x 8 bits * Instruction function Display on/off control Display shift function * Sleep mode can be used to reduce current drain.
* CCB is a trademark of SANYO ELECTRIC CO., LTD. * CCB is SANYO's original bus format and all the bus addresses are controlled by SANYO.
Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft's control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO representative nearest you before using any SANYO products described or contained herein in such applications. SANYO assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO products described or contained herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
51099RM (OT) No. 6144-1/43
LC75817E, 75817W
Package Dimensions
unit: mm 3151-QFP100E
[LC75817E]
0.825 0.65
80 81
unit: mm 3181B-SQFP100
[LC75817W]
1.6 0.575
51 50
0.575
23.2 20.0 0.3
16.0 14.0 0.15 1.0
75
0.5
1.0
51 50
0.145
1.0 15.6 16.0 14.0 0.5
76
17.2 14.0 0.825
0.65
1.6
31 100 100
26
0.1 2.7
0.8
1
30
3.0max
1.0
1
0.2
25
1.6max
1.4
0.1
21.6
0.8
0.5
0.5
SANYO: QFP100E
SANYO: SQFP100
No. 6144-2/43
LC75817E, 75817W Pin Assignments (Top View)
LC75817E QFP100E
LC75817W SQFP100
No. 6144-3/43
LC75817E, 75817W
Specifications
Absolute Maximum Ratings at Ta = 25C, VSS = 0 V
Parameter Maximum supply voltage Symbol VDD max VLCD max VIN1 Input voltage VIN2 VIN3 VOUT1 Output voltage VOUT2 VOUT3 IOUT1 Output current IOUT2 IOUT3 IOUT4 Allowable power dissipation Operating temperature Storage temperature Pd max Topr Tstg VDD VLCD CE, CL, DI, INH OSCI, KI1 to KI5, TEST VLCD1, VLCD2, VLCD3, VLCD4 DO OSCO, KS1 to KS6, P1 to P4 VLCD0, S1 to S60, COM1 to COM10 S1 to S60 COM1 to COM10 KS1 to KS6 P1 to P4 Ta = 85C Conditions Ratings -0.3 to +7.0 -0.3 to +11.0 -0.3 to +7.0 -0.3 to VDD + 0.3 -0.3 to VLCD + 0.3 -0.3 to +7.0 -0.3 to VDD + 0.3 -0.3 to VLCD + 0.3 300 3 1 5 200 -40 to +85 -55 to +125 Unit V V V V V V V V A mA mA mA mW C C
Allowable Operating Ranges at Ta = -40 to +85C, VSS = 0 V
Parameter Symbol VDD Supply voltage VLCD Output voltage VLCD0 VLCD1 Input voltage VLCD2 VLCD3 VLCD4 VIH1 Input high level voltage VIH2 VIH3 Input low level voltage Recommended external resistance Recommended external capacitance Guaranteed oscillation range Data setup time Data hold time CE wait time CE setup time CE hold time High level clock pulse width Low level clock pulse width DO output delay time DO rise time VIL1 VIL2 ROSC COSC fOSC tds tdh tcp tcs tch toH toL tdc tdr VDD When the display contrast adjustment circuit is used. When the display contrast adjustment circuit is not used. VLCD0 VLCD1 VLCD2 VLCD3 VLCD4 CE, CL, DI, INH OSCI KI1 to KI5 CE, CL, DI, INH, KI1 to KI5 OSCI OSCI, OSCO OSCI, OSCO OSC CL, DI: Figure 2 CL, DI: Figure 2 CE, CL: Figure 2 CE, CL: Figure 2 CE, CL: Figure 2 CL: Figure 2 CL: Figure 2 DO, RPU = 4.7k, CL = 10pF: Figure 2*1 DO, RPU = 4.7k, CL = 10pF: Figure 2*1 150 160 160 160 160 160 160 160 1.5 1.5 0 0.8 VDD 0.7 VDD 0.6 VDD 0 0 33 220 300 600 Conditions Ratings min 4.5 7.0 4.5 VLCD4+4.5 3/4 (VLCD0-VLCD4) 2/4 (VLCD0-VLCD4) 1/4 (VLCD0-VLCD4) typ max 6.0 10.0 10.0 VLCD VLCD0 VLCD0 VLCD0 1.5 6.0 VDD VDD 0.2 VDD 0.3 VDD Unit V V V V V V V V V V V V V k pF kHz ns ns ns ns ns ns ns s s
Note: *1. Since the DO pin is an open-drain output, these times depend on the values of the pull-up resistor RPU and the load capacitance CL.
No. 6144-4/43
LC75817E, 75817W Electrical Characteristics for the Allowable Operating Ranges
Parameter Hysteresis Power-down detection voltage Input high level current Input low level current Input floating voltage Pull-down resistance Output off leakage current Symbol VH VDET IIH IIL VIF RPD IOFFH VOH1 VOH2 Output high level voltage VOH3 VOH4 VOH5 VOL1 VOL2 Output low level voltage VOL3 VOL4 VOL5 VOL6 VMID1 Output middle level voltage*2 VMID2 VMID3 Oscillator frequency fOSC IDD1 IDD2 Current drain ILCD1 ILCD2 ILCD3 CE, CL, DI, INH, OSCI: VI = 6.0 V CE, CL, DI, INH, OSCI: VI = 0 V KI1 to KI5 KI1 to KI5: VDD = 5.0 V DO: VO = 6.0 V S1 to S60: IO = -20 A COM1 to COM10: IO = -100 A KS1 to KS6: IO = -500 A P1 to P4: IO = -1 mA OSCO: IO = -500 A S1 to S60: IO = 20 A COM1 to COM10: IO = 100 A KS1 to KS6: IO = 25 A P1 to P4: IO = 1 mA OSCO: IO = 500 A DO: IO = 1 mA S1 to S60: IO 20 A COM1 to COM10: IO = 100 A COM1 to COM10: IO = 100 A OSCI, OSCO: ROSC = 33 k, COSC = 220 pF VDD: sleep mode VDD: VDD = 6.0 V, output open, fOSC = 300 kHz VLCD: sleep mode VLCD: VLCD = 10.0 V, output open, fOSC = 300 kHz When the display contrast adjustment circuit is used. VLCD: VLCD = 10.0 V, output open, fOSC = 300 kHz When the display contrast adjustment circuit is not used. 450 500
2/4 (VLCD0 - VLCD4) - 0.6 3/4 (VLCD0 - VLCD4) - 0.6 1/4 (VLCD0 - VLCD4) - 0.6
Conditions CE, CL, DI, INH, KI1 to KI5
Ratings min typ 0.1 VDD 2.5 3.0 3.5 5.0 -5.0 0.05 VDD 50 100 250 6.0 VLCD0 - 0.6 VLCD0 - 0.6 VDD - 1.0 VDD - 0.5 VDD - 1.0 VDD - 1.0 VLCD4 + 0.6 VLCD4 + 0.6 0.2 0.5 1.5 1.0 1.0 0.1 0.5
2/4 (VLCD0 - VLCD4) + 0.6 3/4 (VLCD0 - VLCD4) + 0.6 1/4 (VLCD0 - VLCD4) + 0.6
max
Unit V V A A V k A V V
VDD - 0.2
V V V V V V V V V V V V kHz A A A A
210
300
390 100 1000 5 900
200
400
A
Note: *2. Excluding the bias voltage generation divider resistor built into the VLCD0, VLCD1, VLCD2, VLCD3, and VLCD4. (See figure 1.)
To the common and segment drivers
Excluding these resistors
Figure 1
No. 6144-5/43
LC75817E, 75817W * When CL is stopped at the low level
* When CL is stopped at the high level
Figure 2 Block Diagram
No. 6144-6/43
LC75817E, 75817W Pin Functions
Pin No. Pin S1 to S59 S60/COM10 COM1 to COM9 LC75817E 3 to 61 62 71 to 63 LC75817W 1 to 59 60 69 to 61 Function Segment driver outputs. The S60/COM10 pin can be used as common driver output under the "set display technique" instruction. Common driver outputs. Key scan outputs. Although normal key scan timing lines require diodes to be inserted in the timing lines to prevent shorts, since these outputs are unbalanced CMOS transistor outputs, these outputs will not be damaged by shorting when these outputs are used to form a key matrix. Key scan inputs. These pins have built-in pull-down resistors. General-purpose output ports Oscillator connections. An oscillator circuit is formed by connecting an external resistor and capacitor at these pins. Serial data interface connections to the controller. Note that DO, being an open-drain output, requires a pull-up resistor. CE : Chip enable CL : Synchronization clock DI : Transfer data DO : Output data Input that turns the display off, disables key scanning, and forces the general-purpose output ports low. * When INH is low (VSS): * Display off S1 to S59 = "L" (VLCD4). S60/COM10 = "L" (VLCD4). COM1 to COM9 = "L" (VLCD4). * General-purpose output ports P1 to P4 = low (VSS) * Key scanning disabled: KS1 to KS6 = low (VSS) * All the key data is reset to low. * When INH is high (VDD): * Display on * The state of the general-purpose output ports can be set by executing a "Set general-purpose output port state" instruction. * Key scanning is enabled. However, serial data can be transferred when the INH pin is low. This pin must be connected to ground. LCD drive 4/4 bias voltage (high level) supply pin. The level on this pin can be changed by the display contrast adjustment circuit. However, (VLCD0 - VLCD4) must be greater than or equal to 4.5 V. Also, external power must not be applied to this pin since the pin circuit includes the display contrast adjustment circuit. LCD drive 3/4 bias voltage (middle level) supply pin. This pin can be used to supply the 3/4 (VLCD0 - VLCD4) voltage level externally. LCD drive 2/4 bias voltage (middle level) supply pin. This pin can be used to supply the 2/4 (VLCD0 - VLCD4) voltage level externally. LCD drive 1/4 bias voltage (middle level) supply pin. This pin can be used to supply the 1/4 (VLCD0 - VLCD4) voltage level externally. LCD drive 0/4 bias voltage (low level) supply pin. Fine adjustment of the display contrast can be implemented by connecting an external variable resistor to this pin. However, (VLCD0 - VLCD4) must be greater than or equal to 4.5 V, and VLCD4 must be in the range 0 V to 1.5 V, inclusive. Logic block power supply connection. Provide a voltage of between 4.5 and 6.0 V. LCD driver block power supply connection. Provide a voltage of between 7.0 and 10.0 V when the display contrast adjustment circuit is used and provide a voltage of between 4.5 and 10.0 V when the circuit is not used. Power supply connection. Connect to ground. Active I/O Handling when unused
-- --
O O
OPEN OPEN
KS1 to KS6
72 to 77
70 to 75
--
O
OPEN
KI1 to KI5 P1 to P4 OSCI OSCO CE CL DI DO
78 to 82 83 to 86 97 96 100 1 2 99
76 to 80 81 to 84 95 94 98 99 100 97
H -- -- -- H
I O I O I I
GND OPEN GND OPEN
GND
-- --
I O OPEN
INH
98
96
L
I
VDD
TEST
95
93
--
I
--
VLCD0
89
87
--
O
OPEN
VLCD1 VLCD2 VLCD3
90 91 92
88 89 90
-- -- --
I I I
OPEN OPEN OPEN
VLCD4
93
91
--
I
GND
VDD
87
85
--
--
--
VLCD
88
86
--
--
--
VSS
94
92
--
--
--
No. 6144-7/43
LC75817E, 75817W Block Functions * AC (address counter) AC is a counter that provides the addresses used for DCRAM and ADRAM. The address is automatically modified internally, and the LCD display state is retained. * DCRAM (data control RAM) DCRAM is RAM that is used to store display data expressed as 8-bit character codes. (These character codes are converted to 5 x 7, 5 x 8, or 5 x 9 dot matrix character patterns using CGROM or CGRAM.) DCRAM has a capacity of 48 x 8 bits, and can hold 48 characters. The table below lists the correspondence between the 6-bit DCRAM address loaded into AC and the display position on the LCD panel.
*
When the DCRAM address loaded into AC is 00H.
1 00 2 01 3 02 4 03 5 04 6 05 7 06 8 07 9 08 10 09 11 0A 12 0B
Display digit DCRAM address (hexadecimal)
However, when the display shift is performed by specifying MDATA, the DCRAM address shifts as shown below.
Display digit DCRAM address (hexadecimal) Display digit DCRAM address (hexadecimal) 1 01 1 2F 2 02 2 00 3 03 3 01 4 04 4 02 5 05 5 03 6 06 6 04 7 07 7 05 8 08 8 06 9 09 9 07 10 0A 10 08 11 0B 11 09 12 0C 12 0A (Right shift) (Left shift)
Note: *3. The DCRAM addresses are expressed in hexadecimal. Least significant bit LSB DCRAM address DA0 DA1 DA2 DA3 Most significant bit MSB DA4 DA5
Hexadecimal
Hexadecimal
Example: When the DCRAM address is 2EH.
DA0 0 DA1 1 DA2 1 DA3 1 DA4 0 5 x 7 dots 5 x 8 dots 4 x 9 dots DA5 1
Note: *4. 5 x 7 dots ... 12-digit display 5 x 8 dots ... 12-digit display 5 x 9 dots ... 12-digit display
No. 6144-8/43
LC75817E, 75817W * ADRAM (Additional data RAM) ADRAM is RAM used to store the ADATA display data. ADRAM has a capacity of 12 x 5 bits, and the stored display data is displayed directly without the use of CGROM or CGRAM. The table below lists the correspondence between the 4-bit ADRAM address loaded into AC and the display position on the LCD panel.
*
When the ADRAM address loaded into AC is 0H. (Number of digit displayed: 12)
1 0 2 1 3 2 4 3 5 4 6 5 7 6 8 7 9 8 10 9 11 A 12 B
Display digit ADRAM address (hexadecimal)
However, when the display shift is performed by specifying ADATA, the ADRAM address shifts as shown below.
Display digit ADRAM address (hexadecimal) Display digit ADRAM address (hexadecimal) 1 1 1 B 2 2 2 0 3 3 3 1 4 4 4 2 5 5 5 3 6 6 6 4 7 7 7 5 8 8 8 6 9 9 9 7 10 A 10 8 11 B 11 9 12 0 12 A (Right shift) (Left shift)
Note: *5. The ADRAM addresses are expressed in hexadecimal. Least significant bit LSB ADRAM address RA0 RA1 Most significant bit MSB RA2 RA3
Hexadecimal
Example: When the ADRAM address is AH
RA0 0 RA1 1 RA2 0 RA3 1
Note: *6. 5 x 7 dots ... 12-digit display 5 x 8 dots ... 12-digit display 5 x 9 dots ... 12-digit display
5 dots 5 dots 4 dots
* CGROM (Character generator ROM) CGROM is ROM used to generate the 240 kinds of 5 x 7, 5 x 8, or 5 x 9 dot matrix character patterns from the 8-bit character codes. CGROM has a capacity of 240 x 45 bits. When a character code is written to DCRAM, the character pattern stored in CGROM corresponding to the character code is displayed at the position on the LCD corresponding to the DCRAM address loaded into AC. * CGRAM (Character generator RAM) CGRAM is RAM to which user programs can freely write arbitrary character patterns. Up to 16 kinds of 5 x 7, 5 x 8, or 5 x 9 dot matrix character patterns can be stored. CGRAM has a capacity of 16 x 45 bits.
No. 6144-9/43
LC75817E, 75817W Serial Data Input * When CL is stopped at the low level
Instruction data (Up to 64 bits)
* When CL is stopped at the high level
Instruction data (Up to 64 bits)
* *
B0 to B3, A0 to A3: CCB address 42H D0 to D63: Instruction data
The data is acquired on the rising edge of the CL signal and latched on the falling edge of the CE signal. When transferring instruction data from the microcontroller, applications must assure that the time from the transfer of one set of instruction data until the next instruction data transfer is significantly longer than the instruction execution time.
No. 6144-10/43
Instruction Table
D42 D43 D44 D45 D46 D47 D48 D49 D50 D51 D52 D53 D54 D55 D56 Execution time *9 D57 D58 D59 D60 D61 D62 D63
Instruction
D0 D1...D39
D40 D41
Set display technique
DT1 DT2
X
X
0
0
0
1
0 s
Display on/off control
DG1 DG2 DG3 DG4 DG5 DG6 DG7 DG8 DG9 DG10 DG11 DG12
X
X
X
X
M
A
SC
SP
0
0
1
0
0 s/27 s *10
Display shift
M
A
R/L
X
0
0
1
1
27 s
Set AC address
DA0 DA1 DA2 DA3 DA4 DA5
X
X
RA0 RA1 RA2 RA3
0
1
0
0
27 s
DCRAM data write *7 X X
AC0 AC1 AC2 AC3 AC4 AC5 AC6 AC7 DA0 DA1 DA2 DA3 DA4 DA5
IM
X
X
X
0
1
0
1
27 s
ADRAM data write *8 X X X RA0 RA1 RA2 RA3 X X X X
AD1 AD2 AD3 AD4 AD5
IM
X
X
X
0
1
1
0
27 s
CGRAM data write
CD1 CD2...CD40
CD41 CD42 CD43 CD44 CD45
X
X
X
CA0 CA1 CA2 CA3 CA4 CA5 CA6 CA7
X
X
X
X
0
1
1
1
27 s
LC75817E, 75817W
Set display contrast
CT0 CT1 CT2 CT3
X
X
X
X
CTC
X
X
X
1
0
0
0
0 s
Set key scan output state
KC1 KC2 KC3 KC4 KC5 KC6
X
X
X
X
X
X
1
0
0
1
0 s
Set general-purpose output port state
PC1 PC2 PC3 PC4
1
0
1
0
0 s X: don't care
Notes:
*7. The data format differs when the "DCRAM data write" instruction is executed in the increment mode (IM = 1). (See detailed instruction descriptions .) *8. The data format differs when the "ADRAM data write" instruction is executed in the increment mode (IM = 1). (See detailed instruction descriptions.) *9. The execution times listed here apply when fosc = 300 kHz. The execution times differ when the oscillator frequency fosc differs. Example: When fosc = 210 kHz 300 27 s x---- = 39 s 210 *10.When the sleep mode (SP = 1) is set, the execution time is 27 s (when fosc = 300 kHz).
No. 6144-11/43
LC75817E, 75817W Detailed Instruction Descriptions * Set display technique ...
Code D56 D57 D58 X D59 X D60 0 D61 0 D62 0 D63 1
DT1 DT2
X: don't care
DT1, DT2: Setting the display technique
DT1 0 1 0 DT2 0 0 1 Display technique 1/8 duty, 1/4 bias drive 1/9 duty, 1/4 bias drive 1/10 duty, 1/4 bias drive Output pins COM9 Fixed at the VLCD4 level COM9 COM9 S60/COM10 S60 S60 COM10 Note: *11 S60: Segment outputs COMn (n = 9, 10): Common outputs
* Display on/off control ...
Code D40 D41 D42 D43 D44 D45 D46 D47 D48 D49 D50 D51 D52 X D53 X D54 X D55 X D56 M D57 A D58 SC D59 D60 SP 0 D61 0 D62 1 D63 0
DG1 DG2 DG3 DG4 DG5 DG6 DG7 DG8 DG9 DG10 DG11 DG12
X: don't care
M, A: Specifies the data to be turned on or off
M 0 0 1 1 A 0 1 0 1 Display operating state Both MDATA and ADATA are turned off (The display is forcibly turned off regardless of the DG1 to DG12 data.) Only ADATA is turned on (The ADATA of display digits specified by the DG1 to DG12 data are turned on.) Only MDATA is turned on (The MDATA of display digits specified by the DG1 to DG12 data are turned on.) Both MDATA and ADATA are turned on (The MDATA and ADATA of display digits specified by the DG1 to DG12 data are turned on.)
Note: *12. MDATA, ADATA 5 x 7 dot matrix display 5 x 8 dot matrix display 5 x 9 dot matrix display
DG1 to DG12: Specifies the display digit
Display digit Display digit data 1 DG1 2 DG2 3 DG3 4 DG4 5 DG5 6 DG6 7 DG7 8 DG8 9 10 11 12 DG9 DG10 DG11 DG12
For example, if DG1 to DG6 are 1, and DG7 to DG12 are 0, then display digits 1 to 6 will be turned on, and display digits 7 to 12 will be turned off (blanked).
No. 6144-12/43
LC75817E, 75817W SC: Controls the common and segment output pins
SC 0 1 Common and segment output pin states Output of LCD drive waveforms Fixed at the VLCD4 level (all segments off)
Note: *13. When SC is 1, the S1 to S60 and COM1 to COM10 output pins are set to the VLCD4 level, regardless of the M, A, and DG1 to DG12 data.
SP: Controls the normal mode and sleep mode
SP 0 Normal mode Sleep mode The common and segment pins go to the VLCD4 level and the oscillator on the OSCI, OSCO pins is stopped (although it operates during key scan operations) to reduce current drain. Although the "display on/off control", "Set display contrast", "Set key scan output state", and "Set general-purpose output port state" instructions can be executed in this mode, applications must return the IC to normal mode to execute any of the other instruction settings. Mode
1
* Display shift ...
Code D56 M D57 A D58 R/L D59 X D60 0 D61 0 D62 1 D63 1
X: don't care
M, A: Specifies the data to be shifted
M 0 0 1 1 A 0 1 0 1 Shift operating state Neither MDATA nor ADATA is shifted Only ADATA is shifted Only MDATA is shifted Both MDATA and ADATA are shifted
R/L: Shift direction specification
R/L 0 1 Shift direction Left shift Right shift
* Set AC address...
Code D48 D49 D50 D51 D52 D53 D54 X D55 X D56 D57 D58 D59 D60 0 D61 1 D62 0 D63 0
DA0 DA1 DA2 DA3 DA4 DA5
RA0 RA1 RA2 RA3
X: don't care
DA0 to DA5: DCRAM address
DA0 DA1 LSB Least significant bit DA2 DA3 DA4 DA5 MSB Most significant bit
RA0 to RA3: ADRAM address
RA0 RA1 LSB Least significant bit RA2 RA3 MSB Most significant bit
This instruction loads the 6-bit DCRAM address DA0 to DA5 and the 4-bit ADRAM address RA0 to RA3 into the AC.
No. 6144-13/43
LC75817E, 75817W * DCRAM data write ...
Code D40 D41 D42 D43 D44 D45 D46 D47 D48 D49 D50 D51 D52 D53 D54 X D55 X D56 IM D57 X D58 X D59 D60 X 0 D61 1 D62 0 D63 1
AC0 AC1 AC2 AC3 AC4 AC5 AC6 AC7 DA0 DA1 DA2 DA3 DA4 DA5
X: don't care
DA0 to DA5: DCRAM address
DA0 DA1 DA2 DA3 DA4 DA5 LSB Least significant bit MSB Most significant bit
AC0 to AC7: DCRAM data (character code)
AC0 AC1 AC2 AC3 AC4 AC5 AC6 AC7 LSB Least significant bit MSB Most significant bit
This instruction writes the 8 bits of data AC0 to AC7 to DCRAM. This data is a character code, and is converted to a 5 x 7, 5 x 8, or 5 x 9 dot matrix display data using CGROM or CGRAM. IM: Setting the method of writing data to DCRAM
IM 0 1 DCRAM data write method Normal DCRAM data write (Specifies the DCRAM address and writes the DCRAM data.) Increment mode DCRAM data write (Increments the DCRAM address by +1 each time data is written to DCRAM.)
Notes: *14. * DCRAM data write method when IM = 0
CCB address (1) 24 bits Instruction execution time
CCB address (1) 24 bits Instruction execution time
CCB address (1) 24 bits Instruction execution time DCRAM data write finishes
CCB address (1) 24 bits Instruction execution time DCRAM data write finishes
DCRAM data write finishes
DCRAM data write finishes
* DCRAM data write method when IM = 1 (Instructions other than the "DCRAM data write" instruction cannot be executed.)
CCB address (1) 24 bits
CCB address (2) 8 bits
CCB address (2) 8 bits
CCB address (2) 8 bits
CCB address (2) 8 bits
CCB address (3) 16 bits
Instruction execution time DCRAM data write finishes
Instruction execution time
Instruction execution time
Instruction execution time
Instruction execution time
Instruction execution time DCRAM data write finishes
DCRAM data write finishes
DCRAM data write finishes
DCRAM data write finishes
DCRAM data write finishes
Instructions other than the "DCRAM data write" instruction cannot be executed.
No. 6144-14/43
LC75817E, 75817W Data format at (1) (24 bits)
Code D40 D41 D42 D43 D44 D45 D46 D47 D48 D49 D50 D51 D52 D53 D54 X D55 X D56 IM D57 X D58 X D59 D60 X 0 D61 1 D62 0 D63 1
AC0 AC1 AC2 AC3 AC4 AC5 AC6 AC7 DA0 DA1 DA2 DA3 DA4 DA5
X: don't care
Data format at (2) (8 bits)
Code D56 D57 D58 D59 D60 D61 D62 D63
AC0 AC1 AC2 AC3 AC4 AC5 AC6 AC7
Data format at (3) (16 bits)
Code D48 D49 D50 D51 D52 D53 D54 D55 D56 0 D57 X D58 X D59 X D60 0 D61 1 D62 0 D63 1
AC0 AC1 AC2 AC3 AC4 AC5 AC6 AC7
X: don't care
* ADRAM data write ...
Code D40 D41 D42 D43 D44 D45 X D46 X D47 X D48 D49 D50 D51 D52 X D53 X D54 X D55 X D56 IM D57 X D58 X D59 D60 X 0 D61 1 D62 1 D63 0
AD1 AD2 AD3 AD4 AD5
RA0 RA1 RA2 RA3
X: don't care
RA0 to RA3: ADRAM address
RA0 LSB Least significant bit RA1 RA2 RA3 MSB Most significant bit
AD1 to AD5: ADATA display data In addition to the 5 x 7, 5 x 8, or 5 x 9 dot matrix display data (MDATA), this IC supports direct display of the five accessory display segments provided in each digit as ADATA. This display function does not use CGROM or CGRAM. The figure below shows the correspondence between the data and the display. When ADn = 1 (where n is an integer between 1 and 5) the segment corresponding to that data will be turned on.
ADATA
Corresponding output pin S5m + 1 (m is an integer between 0 and 11) S5m + 2 S5m + 3 S5m + 4 S5m + 5
(m is an integer between 0 and 11)
AD1 AD2 AD3 AD4 AD5
No. 6144-15/43
LC75817E, 75817W IM: Setting the method of writing data to ADRAM
IM 0 1 ADRAM data write method Normal ADRAM data write (Specifies the ADRAM address and writes the ADRAM data.) Increment mode ADRAM data write (Increments the ADRAM address by +1 each time data is written to ADRAM.)
Notes: *15. * ADRAM data write method when IM = 0
CCB address (4) 24 bits Instruction execution time
CCB address (4) 24 bits Instruction execution time
CCB address (4) 24 bits Instruction execution time ADRAM data write finishes
CCB address (4) 24 bits
Instruction execution time ADRAM data write finishes
ADRAM data write finishes
ADRAM data write finishes
* ADRAM data write method when IM = 1 (Instructions other than the "ADRAM data write" instruction cannot be excuted.)
CCB address (4) 24 bits Instruction execution time
CCB address (5) 8 bits
CCB address (5) 8 bits Instruction execution time
CCB address (5) 8 bits Instruction execution time
CCB address (5) 8 bits
CCB address (6) 16 bits Instruction execution time ADRAM data write finishes
Instruction execution time
Instruction execution time
ADRAM data write finishes
ADRAM data write finishes
ADRAM data write finishes
ADRAM data write finishes
ADRAM data write finishes
Instructions other than the "ADRAM data write" instruction cannot be excuted.
Data format at (4) (24 bits)
Code D40 D41 D42 D43 D44 D45 X D46 X D47 X D48 D49 D50 D51 D52 X D53 X D54 X D55 X D56 IM D57 X D58 X D59 D60 X 0 D61 1 D62 1 D63 0
AD1 AD2 AD3 AD4 AD5
RA0 RA1 RA2 RA3
X: don't care
Data format at (5) (8 bits)
Code D56 D57 D58 D59 D60 D61 X D62 X D63 X
AD1 AD2 AD3 AD4 AD5
X: don't care
Data format at (6) (16 bits)
Code D48 D49 D50 D51 D52 D53 X D54 X D55 X D56 0 D57 X D58 X D59 X D60 0 D61 1 D62 1 D63 0
AD1 AD2 AD3 AD4 AD5
X: don't care
No. 6144-16/43
LC75817E, 75817W * CGRAM data write ...
Code D0 CD1 D1 CD2 D2 CD3 D3 CD4 D4 CD5 D5 CD6 D6 CD7 D7 CD8 D8 CD9 D9 CD10 D10 CD11 D11 CD12 D12 CD13 D13 CD14 D14 CD15 D15 CD16
Code D16 CD17 D17 CD18 D18 CD19 D19 CD20 D20 CD21 D21 CD22 D22 CD23 D23 CD24 D24 CD25 D25 CD26 D26 CD27 D27 CD28 D28 CD29 D29 CD30 D30 CD31 D31 CD32
Code D32 CD33 D33 CD34 D34 CD35 D35 CD36 D36 CD37 D37 CD38 D38 CD39 D39 CD40 D40 CD41 D41 CD42 D42 CD43 D43 CD44 D44 CD45 D45 X D46 X D47 X
Code D48 CA0 D49 CA1 D50 CA2 D51 CA3 D52 CA4 D53 CA5 D54 CA6 D55 CA7 D56 X D57 X D58 X D59 X D60 0 D61 1 D62 1 D63 1 X: don't care
CA0 to CA7: CGRAM address
CA0 CA1 CA2 CA3 CA4 CA5 CA6 CA7 LSB Least significant bit MSB Most significant bit
CD1 to CD45: CGRAM data (5 x 7, 5 x 8, or 5 x 9 dot matrix display data) The bit CDn (where n is an integer between 1 and 45) corresponds to the 5 x 7, 5 x 8, or 5 x 9 dot matrix display data. The figure below shows that correspondence. When CDn is 1 the dots which correspond to that data will be turned on.
CD1 CD6 CD11 CD16 CD21 CD26 CD31 CD36 CD41
CD2 CD7 CD12 CD17 CD22 CD27 CD32 CD37 CD42
CD3 CD8 CD13 CD18 CD23 CD28 CD33 CD38 CD43
CD4 CD9 CD14 CD19 CD24 CD29 CD34 CD39 CD44
CD5 CD10 CD15 CD20 CD25 CD30 CD35 CD40 CD45
Note: *16. CD1 to CD35: 5 x 7 dot matrix display data CD1 to CD40: 5 x 8 dot matrix display data CD1 to CD45: 5 x 9 dot matrix display data
No. 6144-17/43
LC75817E, 75817W * Set display contrast ...
Code D48 CT0 D49 CT1 D50 CT2 D51 CT3 D52 X D53 X D54 X D55 X D56 CTC D57 X D58 X D59 X D60 1 D61 0 D62 0 D63 0 X: don't care
CT0 to CT3: Display contrast setting (11 steps)
CT0 0 1 0 1 0 1 0 1 0 1 0 CT1 0 0 1 1 0 0 1 1 0 0 1 CT2 0 0 0 0 1 1 1 1 0 0 0 CT3 0 0 0 0 0 0 0 0 1 1 1 LCD drive 4/4 bias voltage supply VLCD0 level 0.94 VLCD = VLCD - (0.03 VLCD x 2) 0.91 VLCD = VLCD - (0.03 VLCD x 3) 0.88 VLCD = VLCD - (0.03 VLCD x 4) 0.85 VLCD = VLCD - (0.03 VLCD x 5) 0.82 VLCD = VLCD - (0.03 VLCD x 6) 0.79 VLCD = VLCD - (0.03 VLCD x 7) 0.76 VLCD = VLCD - (0.03 VLCD x 8) 0.73 VLCD = VLCD - (0.03 VLCD x 9) 0.70 VLCD = VLCD - (0.03 VLCD x 10) 0.67 VLCD = VLCD - (0.03 VLCD x 11) 0.64 VLCD = VLCD - (0.03 VLCD x 12)
CTC: Display contrast adjustment circuit state setting
CTC 0 1 Display contrast adjustment circuit state The display contrast adjustment circuit is disabled, and the VLCD0 pin level is forced to the VLCD level. The display contrast adjustment circuit operates, and the display contrast is adjusted.
Note that although the display contrast can be adjusted by operating the built-in display contrast adjustment circuit, it is also possible to apply fine adjustments to the contrast by connecting an external variable resistor to the VLCD4 pin and modifying the VLCD4 pin voltage. However, the following conditions must be met: (VLCD0 - VLCD4) 4.5 V, and 1.5 V VLCD4 0 V.
No. 6144-18/43
LC75817E, 75817W * Set key scan output state ...
Code D48 KC1 D49 KC2 D50 KC3 D51 KC4 D52 KC5 D53 KC6 D54 X D55 X D56 X D57 X D58 X D59 X D60 1 D61 0 D62 0 D63 1 X: don't care
KC1 to KC6: Key scan output pin KS1 to KS6 state settings.
Output pin Key scan output state setting data KS1 KC1 KS2 KC2 KS3 KC3 KS4 KC4 KS5 KC5 KS6 KC6
For example, if KC1 to KC3 are set to 1, and KC4 to KC6 are set to 0, then the output pins KS1 to KS3 will output high levels (VDD) and the output pins KS4 to KS6 will output low levels (VSS) in the key scan standby state. Note that key scan output signal is not output from output pins that are set low. * Set general-purpose output port state ...
Code D56 D57 D58 D59 D60 1 D61 0 D62 1 D63 0
PC1 PC2 PC3 PC4
PC1 to PC4: General-purpose output port P1 to P4 state settings
Output pin General-purpose output port state setting data P1 PC1 P2 PC2 P3 PC3 P4 PC4
For example, if PC1 and PC2 are set to 1 and PC3 and PC4 are set to 0, then output pins P1 and P2 will output high levels (VDD) and P3 and P4 will output low levels (VSS).
No. 6144-19/43
LC75817E, 75817W Serial Data Output * When CL is stopped at the low level
* When CL is stopped at the high level
* * *
B0 to B3, A0 to A3 : CCB address 43H KD1 to KD30 : Key data SA : Sleep acknowledge data
Note: *17. If a key data read operation is executed when DO is high, the read key data (KD1 to KD30) and sleep acknowledge data(SA) will be invalid.
No. 6144-20/43
LC75817E, 75817W Output Data * KD1 to KD30 : Key data When a key matrix of up to 30 keys is formed from the KS1 to KS6 output pins and the KI1 to KI5 input pins and one of those keys is pressed, the key output data corresponding to that key will be set to 1. The table shows the relationship between those pins and the key data bits.
KI1 KS1 KS2 KS3 KS4 KS5 KS6 KD1 KD6 KD11 KD16 KD21 KD26 KI2 KD2 KD7 KD12 KD17 KD22 KD27 KI3 KD3 KD8 KD13 KD18 KD23 KD28 KI4 KD4 KD9 KD14 KD19 KD24 KD29 KI5 KD5 KD10 KD15 KD20 KD25 KD30
When the states of the KS1 to KS6 output pins during key scan standby are set to low for KS1 and KS2 and to high for KS3 to KS6 with the "set key scan output state" instruction and a key matrix of up to 20 keys is formed from the KS3 to KS6 output pins and the KI1 to KI5 input pins, the KD1 to KD10 key data bits will be set to 0. * SA : Sleep acknowledge data This output data bit is set to the state when the key was pressed. Also, while DO will be low in this case, if serial data is input and the mode is set (to normal or sleep mode) during this period, that mode will be set. SA will be 1 in sleep mode and 0 in normal mode.
No. 6144-21/43
LC75817E, 75817W Key Scan Operation Functions * Key scan timing The key scan period is 2304T(s). To reliably determine the on/off state of the keys, the LC75817E/W scans the keys twice and determines that a key has been pressed when the key data agrees. It outputs a key data read request (a low level on DO) 4800T(s) after starting a key scan. If the key data dose not agree and a key was pressed at that point, it scans the keys again. Thus the LC75817E/W cannot detect a key press shorter than 4800T(s).
KS1
*18
*18
KS2
*18
*18
KS3
*18
*18 T= 1 fosc
KS4
*18
*18
KS5
*18
*18
KS6
*18
*18
4608T(s)
Key on Note: *18. Note that the high/low states of these pins are determined by the "set key scan output state" instruction, and that key scan output signals are not output from pins that are set to low.
* In normal mode * The pins KS1 to KS6 are set to high or low with the "set key scan output state" instruction. * If a key on one of the lines corresponding to a KS1 to KS6 pin which is set high is pressed, a key scan is started and the keys are scanned until all keys are released. Multiple key presses are recognized by determining whether multiple key data bits are set. 1 * If a key is pressed for longer than 4800T(s) (Where T= ---- ) the LC75817E/W outputs a key data read request (a fosc low level on DO) to the controller. The controller acknowledges this request and reads the key data. However, if CE is high during a serial data transfer, DO will be set high. * After the controller reads the key data, the key data read request is cleared (DO is set high) and the LC75817E/W performs another key scan. Also note that DO, being an open-drain output, requires a pull-up resistor (between 1 and 10 k).
Key input 1
Key input 2
Key scan 4800T(s) CE
Serial data transfer Serial data transfer
Key address (43H)
4800T(s)
4800T(s)
Serial data transfer
Key address
Key address
DI
DO Key data read Key data read request Key data read Key data read request Key data read Key data read request T= 1 fosc
No. 6144-22/43
LC75817E, 75817W * In sleep mode * The pins KS1 to KS6 are set to high or low with the "set key scan output state" instruction. * If a key on one of the lines corresponding to a KS1 to KS6 pin which is set high is pressed, the oscillator on the OSCI, OSCO pins is started and a key scan is performed. Keys are scanned until all keys are released. Multiple key presses are recognized by determining whether multiple key data bits are set. 1 * If a key is pressed for longer than 4800T(s)(Where T= ---- ) the LC75817E/W outputs a key data read request (a fosc low level on DO) to the controller. The controller acknowledges this request and reads the key data. However, if CE is high during a serial data transfer, DO will be set high. * After the controller reads the key data, the key data read request is cleared (DO is set high) and the LC75817E/W performs another key scan. However, this dose not clear sleep mode. Also note that DO, being an open-drain output, requires a pull-up resistor (between 1 and 10 k). * Sleep mode key scan example Example: When a "display on/off control (SP = 1)" instruction and a "set key scan output state (KC1 to KC5 = 0, KC6 = 1)" instruction are executed (i.e. sleep mode with only KS6 high)
"L" KS1 "L" KS2 "L" KS3 "L" KS4 "L" KS5 "H" KS6 *19 KI1 KI2 KI3 KI4 KI5 Note: *19. These diodes are required to reliably recognize multiple key presses on the KS6 line when sleep mode state with only KS6 high, as in the above example. That is, these diodes prevent incorrect operations due to sneak currents in the KS6 key scan output signal when keys on the KS1 to KS5 lines are pressed at the same time. When any one of these keys is pressed, the oscillator on the OSCI, OSCO pins is started and the keys are scanned.
Key input (KS6 line)
Key scan 4800T(s) CE
Serial data transfer Serial data transfer Key address (43H) Serial data transfer Key address
4800T(s)
T=
1 fosc
DI
DO Key data read Key data read request Key data read Key data read request
Multiple Key Presses Although the LC75817E/W is capable of key scanning without inserting diodes for dual key presses, triple key presses on the KI1 to KI5 input pin lines, or multiple key presses on the KS1 to KS6 output pin lines, multiple presses other than these cases may result in keys that were not pressed recognized as having been pressed. Therefore, a diode must be inserted in series with each key. Applications that do not recognize multiple key presses of three or more keys should check the key data for three or more 1 bits and ignore such data.
No. 6144-23/43
LC75817E, 75817W 1/8 Duty, 1/4 Bias Drive Technique
VLCD0
VLCD4 VLCD0
VLCD4
VLCD0
VLCD4 VLCD0
LCD driver output when all LCD segments corresponding to COM1 to COM8 are turned off
VLCD4
LCD driver output when only LCD segments corresponding to COM1 are turned on
VLCD0
VLCD4
LCD driver output when only LCD segments corresponding to COM2 are turned on
VLCD0
VLCD4 VLCD0
LCD driver output when all LCD segments corresponding to COM1 to COM8 are turned on
VLCD4
No. 6144-24/43
LC75817E, 75817W 1/9 Duty, 1/4 Bias Drive Technique
VLCD0
VLCD4 VLCD0
VLCD4
VLCD0
VLCD4 VLCD0
LCD driver output when all LCD segments corresponding to COM1 to COM9 are turned off
VLCD4
LCD driver output when only LCD segments corresponding to COM1 are turned on
VLCD0
VLCD4
LCD driver output when only LCD segments corresponding to COM2 are turned on
VLCD0
VLCD4
LCD driver output when all LCD segments corresponding to COM1 to COM9 are turned on
VLCD0
VLCD4
No. 6144-25/43
LC75817E, 75817W 1/10 Duty, 1/4 Bias Drive Technique
VLCD0
VLCD4 VLCD0
VLCD4
VLCD0
VLCD4 VLCD0
LCD driver output when all LCD segments corresponding to COM1 to COM10 are turned off
VLCD4
LCD driver output when only LCD segments corresponding to COM1 are turned on
VLCD0
VLCD4 VLCD0
LCD driver output when only LCD segments corresponding to COM2 are turned on
VLCD4
LCD driver output when all LCD segments corresponding to COM1 to COM10 are turned on
VLCD0
VLCD4
No. 6144-26/43
LC75817E, 75817W Voltage Detection Type Reset Circuit (VDET) This circuit generates an output signal and resets the system when logic block power is first applied and when the voltage drops, i.e., when the logic block power supply voltage is less than or equal to the power down detection voltage VDET, which is 3.0V, typical. To assure that this function operates reliably, a capacitor must be added to the logic block power supply line so that the logic block power supply voltage VDD rise time when the logic block power is first applied and the logic block power supply voltage VDD fall time when the voltage drops are both at least 1 ms. (See Figure 3.) Power Supply Sequence The following sequences must be observed when power is turned on and off. (See Figure 3.) * Power on :Logic block power supply(VDD) on LCD driver block power supply(VLCD) on * Power off:LCD driver block power supply(VLCD) off Logic block power supply(VDD) off However, if the logic and LCD driver blocks use a shared power supply, then the power supplies can be turned on and off at the same time. System Reset 1. Reset function The LC75817E/W performs a system reset with the VDET. When a system reset is applied, the display is turned off, key scanning is disabled, the key data is reset, and the general-purpose ports are set to and held at the low level (VSS). These states that are created as a result of the system reset can be cleared by executing the instruction described below. (See figure 3.) * Clearing the display off state Display operation can be enabled by executing a "display on/off control" instruction. However, since the contents of the DCRAM, ADRAM, and CGRAM are undefined, applications must set the contents of these memories before turning on display with the "display on/off control" instruction. That is, applications must execute the following instructions. Set display technique DCRAM data write * ADRAM data write (If the ADRAM is used.) * CGRAM data write (If the CGRAM is used.) * Set AC address * Set display contrast (If the display contrast adjustment circuit is used.)
* *
After executing the above instructions, applications must turn on the display with a "display on/off control" instruction. Note that when applications turn off in the normal mode, applications must turn off the display with a "display on/off control" instruction or the INH pin. * Clearing the key scan disable and key data reset states Executing a "set key scan output state" instruction not only creates a state in which key scanning can be performed, but also clears the key data reset. * Clearing the general-purpose output ports locked at the low level (VSS) state Executing a "set general-purpose output port state" instruction clears the general-purpose output ports locked at the low level (VSS) state and sets the states of the general-purpose output ports.
No. 6144-27/43
LC75817E, 75817W
t1 VDD
VDET VDET
t2
t3 t4
VLCD
Instruction execution
Initial state settings
Key scan
Disabled
Execution enabled
General-purpose output ports
Fixed at the low level (VSS)
Can be set to either the high (VDD) or low (VSS) level.
Display state
Display off
Display on
Display off
"Set key scan output "Set general-purpose output port state" state" instruction instruction execution execution
"Display on/off control" instruction execution (Turning the display on)
"Display on/off control" instruction execution (Turning the display off)
* t1 1 ms (Logic block power supply voltage VDD rise time) * t2 0 ms * t3 0 ms * t4 1 ms (Logic block power supply voltage VDD fall time) * Initial state settings Set display technique DCRAM data write ADRAM data write (If the ADRAM is used.) CGRAM data write (If the CGRAM is used.) Set AC address Set display contrast (If the display contrast adjustment circuit is used.)
Figure 3
No. 6144-28/43
LC75817E, 75817W 2. Block states during a system reset (1) CLOCK GENERATOR, TIMING GENERATOR When a reset is applied, the oscillator on the OSCI, OSCO pins is started forcibly. This generates the base clock and enables instruction execution. (2) INSTRUCTION REGISTER, INSTRUCTION DECODER When a reset is applied, these circuits are forcibly initialized internally. Then, when instruction execution starts, the IC operates according to those instructions. (3) ADDRESS REGISTER, ADDRESS COUNTER When a reset is applied, these circuits are forcibly initialized internally. Then, the DCRAM and the ADRAM addresses are set when "Set AC address" instruction is executed. (4) DCRAM, ADRAM, CGRAM Since the contents of the DCRAM, ADRAM, and CGRAM become undefined during a reset, applications must execute "DCRAM data write", "ADRAM data write (If the ADRAM is used.)", and "CGRAM data write (If the CGRAM is used.)" instructions before executing a "display on/off control" instruction. (5) CGROM Character patterns are stored in this ROM. (6) LATCH Although the value of the data in the latch is undefined during a reset, the ADRAM, CGROM, and CGRAM data is stored by executing a "display on/off control" instruction. (7) COMMON DRIVER, SEGMENT DRIVER These circuits are forced to the display off state when a reset is applied. (8) CONTRAST ADJUSTER Display contrast adjustment circuit operation is disabled when a reset is applied. After that, the display contrast can be set by executing a "set display contrast" instruction. (9) KEY SCAN, KEY BUFFER When a reset is applied, these circuits are forcibly initialized internally, and key scan operation is disabled. Also, the key data is all set to 0. After that, key scanning can be performed by executing a "set key scan output state" instruction. (10) GENERAL PORT The general-purpose output ports are fixed at the low level (VSS) when a reset is applied. (11) CCB INTERFACE, SHIFT REGISTER These circuits go to the serial data input wait state.
No. 6144-29/43
LC75817E, 75817W
GENERAL PORT
COMMON DRIVER
SEGMENT DRIVER
INSTRUCTION DECODER
CONTRAST ADJUSTER INSTRUCTION REGISTER
ADDRESS COUNTER
ADDRESS REGISTER
KEY BUFFER VDET TIMING GENERATOR
CLOCK GENERATOR
KEY SCAN
Blocks that are reset
3. Output pin states during the reset period
Output pin S1 to S59 S60/COM10 COM1 to COM9 KS1 to KS6 P1 to P4 DO State during reset L (VLCD4) L (VLCD4)*20 L (VLCD4) L (VSS) L (VSS) H *21
Notes: *20. This output pin is forcibly set to its segment output function and held at the low level (VLCD4). However, when a "set display technique" instruction is executed, the segment output or the common output function is selected as specified by that instruction. *21. Since this output pin is an open-drain output, a pull-up resistor (between 1 k and 10 k) is required. This pin is held at the high level even if a key data read operation is performed before executing a "set key scan output state" instruction.
No. 6144-30/43
LC75817E, 75817W Sample Application Circuit 1 1/8 duty, 1/4 bias drive technique (for use with normal panels)
LCD panel
*22
*23
C 0.047 F
*24 From the controller To the controller To the controller power supply *25 (general-purpose output ports) used with the backlight controller or other circuit
Key matrix (up to 30 keys)
Notes: *22. Add a capacitor to the logic block power supply line so that the logic block power supply voltage VDD rise time when power is applied and the logic block power supply voltage VDD fall time when power drops are both at least 1 ms, as the LC75817E/W is reset by the VDET. *23. If a variable resistor is not used for display contrast fine adjustment, the VLCD4 pin must be connected to ground. *24. If the INH pin is not used, it must be connected to the logic block power supply VDD. *25. The DO pin, being an open-drain output, requires a pull-up resistor. Select a resistance (between 1 to 10 k) appropriate for the capacitance of the external wiring so that signal waveforms are not degraded.
No. 6144-31/43
LC75817E, 75817W Sample Application Circuit 2 1/8 duty, 1/4 bias drive technique (for use with large panels)
LCD panel
*22
*23
C 0.047 F 10 k R 2.2 k
*24 From the controller To the controller To the controller power supply *25 (general-purpose output ports) used with the backlight controller or other circuit
Key matrix (up to 30 keys)
Notes: *22. Add a capacitor to the logic block power supply line so that the logic block power supply voltage VDD rise time when power is applied and the logic block power supply voltage VDD fall time when power drops are both at least 1 ms, as the LC75817E/W is reset by the VDET. *23. If a variable resistor is not used for display contrast fine adjustment, the VLCD4 pin must be connected to ground. *24. If the INH pin is not used, it must be connected to the logic block power supply VDD. *25. The DO pin, being an open-drain output, requires a pull-up resistor. Select a resistance (between 1 to 10 k) appropriate for the capacitance of the external wiring so that signal waveforms are not degraded.
No. 6144-32/43
LC75817E, 75817W Sample Application Circuit 3 1/9 duty, 1/4 bias drive technique (for use with normal panels)
LCD panel
*22
*23
C 0.047 F
From the controller To the controller To the controller power supply *25
*24 (general-purpose output ports) used with the backlight controller or other circuit
Key matrix (up to 30 keys)
Notes: *22. Add a capacitor to the logic block power supply line so that the logic block power supply voltage VDD rise time when power is applied and the logic block power supply voltage VDD fall time when power drops are both at least 1 ms, as the LC75817E/W is reset by the VDET. *23. If a variable resistor is not used for display contrast fine adjustment, the VLCD4 pin must be connected to ground. *24. If the INH pin is not used, it must be connected to the logic block power supply VDD. *25. The DO pin, being an open-drain output, requires a pull-up resistor. Select a resistance (between 1 to 10 k) appropriate for the capacitance of the external wiring so that signal waveforms are not degraded.
No. 6144-33/43
LC75817E, 75817W Sample Application Circuit 4 1/9 duty, 1/4 bias drive technique (for use with large panels)
LCD panel
*22
*23
C 0.047 F 10 k R 2.2 k
From the controller To the controller To the controller power supply *25
*24 (general-purpose output ports) used with the backlight controller or other circuit
Key matrix (up to 30 keys)
Notes: *22. Add a capacitor to the logic block power supply line so that the logic block power supply voltage VDD rise time when power is applied and the logic block power supply voltage VDD fall time when power drops are both at least 1 ms, as the LC75817E/W is reset by the VDET. *23. If a variable resistor is not used for display contrast fine adjustment, the VLCD4 pin must be connected to ground. *24. If the INH pin is not used, it must be connected to the logic block power supply VDD. *25. The DO pin, being an open-drain output, requires a pull-up resistor. Select a resistance (between 1 to 10 k) appropriate for the capacitance of the external wiring so that signal waveforms are not degraded.
No. 6144-34/43
LC75817E, 75817W Sample Application Circuit 5 1/10 duty, 1/4 bias drive technique (for use with normal panels)
LCD panel
*22
*23
C 0.047 F
From the controller To the controller To the controller power supply *25
*24 (general-purpose output ports) used with the backlight controller or other circuit
Key matrix (up to 30 keys)
Notes: *22. Add a capacitor to the logic block power supply line so that the logic block power supply voltage VDD rise time when power is applied and the logic block power supply voltage VDD fall time when power drops are both at least 1 ms, as the LC75817E/W is reset by the VDET. *23. If a variable resistor is not used for display contrast fine adjustment, the VLCD4 pin must be connected to ground. *24. If the INH pin is not used, it must be connected to the logic block power supply VDD. *25. The DO pin, being an open-drain output, requires a pull-up resistor. Select a resistance (between 1 to 10 k) appropriate for the capacitance of the external wiring so that signal waveforms are not degraded.
No. 6144-35/43
LC75817E, 75817W Sample Application Circuit 6 1/10 duty, 1/4 bias drive technique (for use with large panels)
LCD panel
*22
*23
C 0.047 F 10 k R 2.2 k
From the controller To the controller To the controller power supply *25
*24 (general-purpose output ports) used with the backlight controller or other circuit
Key matrix (up to 30 keys)
Notes: *22. Add a capacitor to the logic block power supply line so that the logic block power supply voltage VDD rise time when power is applied and the logic block power supply voltage VDD fall time when power drops are both at least 1 ms, as the LC75817E/W is reset by the VDET. *23. If a variable resistor is not used for display contrast fine adjustment, the VLCD4 pin must be connected to ground. *24. If the INH pin is not used, it must be connected to the logic block power supply VDD. *25. The DO pin, being an open-drain output, requires a pull-up resistor. Select a resistance (between 1 to 10 k) appropriate for the capacitance of the external wiring so that signal waveforms are not degraded.
No. 6144-36/43
LC75817E, 75817W Sample Correspondence between Instructions and the Display (When the LC75817-8720 is used)
No. LSB Instruction (hexadecimal) MSB Display Initializes the IC. The display is in the off state. Sets to 1/8 duty 1/4 bias display drive technique Operation
D40 to D43 D44 to D47 D48 to D51 D52 to D55 D56 to D59 D60 to D63
1
Power application (Initialization with the VDET.) Set display technique 0 DCRAM data write (increment mode) 0 2 0 0 1 A 8
2
3
Writes the display data " " to DCRAM address 00H
4
DCRAM data write (increment mode) 3 DCRAM data write (increment mode) 1 DCRAM data write (increment mode) E DCRAM data write (increment mode) 9 DCRAM data write (increment mode) F DCRAM data write (increment mode) 0 DCRAM data write (increment mode) C DCRAM data write (increment mode) 3 DCRAM data write (increment mode) 9 DCRAM data write (increment mode) 0 DCRAM data write (increment mode) 0 DCRAM data write (increment mode) C DCRAM data write (increment mode) 3 DCRAM data write (increment mode) 7 DCRAM data write (increment mode) 5 DCRAM data write (increment mode) 8 DCRAM data write (increment mode) 1 DCRAM data write (increment mode) 7 3 0 A 3 3 3 3 4 4 2 2 4 5 4 2 4 5 4 4 5
Writes the display data "S" to DCRAM address 01H
5
Writes the display data "A" to DCRAM address 02H
6
Writes the display data "N" to DCRAM address 03H
7
Writes the display data "Y" to DCRAM address 04H
8
Writes the display data "O" to DCRAM address 05H
9
Writes the display data " " to DCRAM address 06H
10
Writes the display data "L" to DCRAM address 07H
11
Writes the display data "S" to DCRAM address 08H
12
Writes the display data "I" to DCRAM address 09H
13
Writes the display data " " to DCRAM address 0AH
14
Writes the display data " " to DCRAM address 0BH
15
Writes the display data "L" to DCRAM address 0CH
16
Writes the display data "C" to DCRAM address 0DH
17
Writes the display data "7" to DCRAM address 0EH
18
Writes the display data "5" to DCRAM address 0FH
19
Writes the display data "8" to DCRAM address 10H
20
Writes the display data "1" to DCRAM address 11H
21
Writes the display data "7" to DCRAM address 12H
Continued on next page.
No. 6144-37/43
LC75817E, 75817W
Continued from preceding page.
No. LSB Instruction (hexadecimal) MSB Display Operation Loads the DCRAM address 00H and the ADRAM 0 2 SANYO LSI address 0H into AC Turns on the LCD for all digits (12 digits) in MDATA L
D40 to D43 D44 to D47 D48 to D51 D52 to D55 D56 to D59 D60 to D63
22
Set AC address 0 0
23
Display on/off control F F F X 1 4
24
Display shift 1 Display shift 1 Display shift 1 Display shift 1 Display shift 1 Display shift 1 Display shift 1 Display on/off control 0 0 0 X 8 4 C C C C C C C
SANYO
LSI
Shifts the display (MDATA only) to the left
25
ANYO
LSI
LC
Shifts the display (MDATA only) to the left
26
NYO
LSI
LC7
Shifts the display (MDATA only) to the left
27
YO
LSI
LC75
Shifts the display (MDATA only) to the left
28
O
LSI
LC758
Shifts the display (MDATA only) to the left
29
LSI
LC7581
Shifts the display (MDATA only) to the left
30
LSI
LC75817
Shifts the display (MDATA only) to the left
31
Set to sleep mode, turns off the LCD for all digits LSI LC75817
32
Display on/off control F F F X 1 4
Turns on the LCD for all digits (12 digits) in MDATA Loads the DCRAM address 00H and the ADRAM address 0H into AC X: don't care
33
Set AC address 0 0 0 2
SANYO
LSI
Note: *26. This example above assumes the use of 12 digits 5 x 7 dot matrix LCD. CGRAM and ADRAM are not used.
No. 6144-38/43
LC75817E, 75817W Notes on the controller key data read techniques 1. Timer based key data acquisition * Flowchart
CE = L
NO DO = L YES Key data read processing
* Timing chart
Key on Key input Key on
Key scan t5 CE t8 DI t7 DO Key data read request t9 Controller determination (Key on) Controller determination (Key on) t9 Controller determination (Key off) t9 Controller determination (Key on) t9 Controller determination (Key off) Key address Key data read t7 t7 t8 t8 t6 t5 t5
t5: Key scan execution time when the key data agreed for two key scans. (4800T(s)) t6: Key scan execution time when the key data did not agree for two key scans and the key scan was executed again. (9600T(s)) t7: Key address (43H) transfer time t8: Key data read time 1 T = ------ fosc
* Explanation In this technique, the controller uses a timer to determine key on/off states and read the key data. The controller must check the DO state when CE is low every t9 period without fail. If DO is low, the controller recognizes that a key has been pressed and executes the key data read operation. The period t9 in this technique must satisfy the following condition. t9>t6+t7+t8 If a key data read operation is executed when DO is high, the read key data (KD1 to KD30) and sleep acknowledge data (SA) will be invalid.
No. 6144-39/43
LC75817E, 75817W 2. Interrupt based key data acquisition * Flowchart
CE = L
NO DO = L YES Key data read processing
Wait for at least t10
CE = L
NO
DO = H YES Key off
* Timing chart
Key on Key input Key on
Key scan t5 CE t8 DI t7 DO Key data read request t10 Controller determination (Key on) Controller determination (Key off) Controller determination (Key on) t10 Controller determination (Key on) t10 Controller determination (Key on) t10 Controller determination (Key off) Key address Key data read t7 t7 t7 t8 t8 t8 t5 t6 t5
t5: Key scan execution time when the key data agreed for two key scans. (4800T(s)) t6: Key scan execution time when the key data did not agree for two key scans and the key scan was executed again. (9600T(s)) t7: Key address (43H) transfer time t8: Key data read time 1 T = ------ fosc
No. 6144-40/43
LC75817E, 75817W * Explanation In this technique, the controller uses interrupts to determine key on/off states and read the key data. The controller must check the DO state when CE is low. If DO is low, the controller recognizes that a key has been pressed and executes the key data read operation. After that the next key on/off determination is performed after the time t10 has elapsed by checking the DO state when CE is low and reading the key data. The period t10 in this technique must satisfy the following condition. t10 > t6 If a key data read operation is executed when DO is high, the read key data (KD1 to KD30) and sleep acknowledge data (SA) will be invalid.
No. 6144-41/43
LC75817-8720 Character Font (Standard)
LC75817E, 75817W
No. 6144-42/43
A10735
LC75811E, 75811W
Specifications of any and all SANYO products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer's products or equipment. SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all semiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any or all SANYO products (including technical data, services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be exported without obtaining the export license from the authorities concerned in accordance with the above law. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission of SANYO Electric Co., Ltd. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the SANYO product that you intend to use. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties.
This catalog provides information as of May, 1999. Specifications and information herein are subject to change without notice. PS No. 6144-43/43

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