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SyncMOS Technologies Inc.
August 2000
SM2958
8 - Bit Micro-controller
with 32KB flash embedded
Product List
SM2958C16, 16 MHz 8KB internal memory MCU SM2958C25, 25 MHz 8KB internal memory MCU SM2958C40, 40 MHz 8KB internal memory MCU
Features
Working voltage:4.5V through 5.5V General 8052 family compatible 12 clocks per machine cycle 32 KB internal flash memory 256 bytes data RAM Three16 bit timers/counters Four 8-bit I/O ports Full duplex serial channel Bit operation instruction Page free jumps 8-bit unsigned division 8-bit unsigned multiply BCD arithmetic Direct addressing Indirect addressing Nested interrupt Two priority level interrupt A serial I/O port Power save modes: Idle mode and power down mode Code protection function
Description
The SM2958 product is an 8 - bit single chip micro controller with 32 KB flash embedded. It provides hardware features and a powerful instruction set, necessary to make it a versatile and cost effective controller for those applications demand up to 32 I/O pins or need up to 32 KB flash memory either for program or for data or mixed. To program the flash block, a commercial programmer is capable to do it.
Ordering Information
yyww SM2958ihhk yy: year, ww:week v: version identifier { , A, B, ...} i: process identifier {C} hh: working clock in MHz {16, 25, 40} k: package type postfix {as below table}
Postfix P J Q
Package 40L PDIP 44L PLCC 44L QFP
Pin/Pad Configuration page 2 page 2 page 2
Dimension page 11 page 12 page 13
Taiwan 4F, No. 1 Creation Road 1, Science-based Industrial Park, Hsinchu, Taiwan 30077 TEL: 886-3-579-2926 886-3-579-2988 FAX: 886-3-579-2960 886-3-578-0493
Specifications subject to change without notice,contact your sales representatives for the most recent information.
1/16
Ver 1.0
PID 2958 08/00
SyncMOS Technologies Inc.
August 2000
SM2958
Pin Configurations
T2EX/P1.1 T2/P1.0 NC VDD P0.0/AD0 P0.1/AD1
T2EX/P1.1 T2/P1.0
P0.0/AD0
P0.1/AD1
P0.2/AD2
P0.3/AD3
P1.4
P1.3 P1.2
6
5
4
3
2
1 44 43 42 41 40
P1.5 P1.6 P1.7 RES RXD/P3.0 NC TXD/P3.1 #INT0/P3.2 #INT1/P3.3 T0/P3.4 T1/P3.5
7 8 9 10 11 12 13
39 38 37 36 35 34 33 32 31 30 29
P0.4/AD4 P0.5/AD5 P0.6/AD6 P0.7/AD7 #EA/VPP NC ALE #PSEN P2.7/A15 P2.6/A14 P2.5/A13
P1.5 P1.6 P1.5 RES RXD/P3.0 NC TXD/P3.1 #INT0/P3.2 #INT1/P3.3 T0/P3.4 T1/P3.5
1 2 3 4 5 6 7 8 9 10 11
44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 12 13 14 15 16 17 18 19 20 21 22
P0.2/AD2 P0.3/AD3
P1.4
P1.3
P1.2
NC VDD
P0.4/AD4 P0.5/AD5 P0.6/AD6 P0.7/AD7 #EA/VPP NC ALE #PSEN P2.7/A15 P2.6/A14 P2.5/A13
SM2958 ihhJ 44L PLCC
(Top View)
SM2958 ihhQ 44L QFP (Top View)
14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
#WR/P3.6
#RD/P3.7 XTAL2 XTAL1 VSS
P2.2/A10
P2.3/A11
P2.4/A12
P2.0/A8
P2.1/A9
NC
#WR/P3.6 #RD/P3.7 XTAL2 XTAL1 VSS
P2.3/A11
T2/P1.0 T2EX/P1.1 P1.2 P1.3 P1.4 P1.5 P1.6 P1.7 RES RXD/P3.0 TXD/P3.1 #INT/P3.2 #INT1/P3.3 T0/P3.4 T1/P3.5 #WR/P3.6 #RD/P3.7 XTAL2 XTAL1 VSS
1 2 3 4 5 6 7 8
40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21
VDD P0.0/AD0 P0.1/AD1 P0.2/AD2 P0.3/AD3 P0.4/AD4 P0.5/AD5 P0.6/AD6 P0.7/AD7 #EA/VPP ALE #PSEN P2.7/A15 P2.6/A14 P2.5/A13 P2.4/A12 P2.3/A11 P2.2/A10 P2.1/A9 P2.0/A8
9 10 11
12
13 14 15 16 17 18 19 20
Specifications subject to change without notice,contact your sales representatives for the most recent information.
2/16
Ver 1.0
P2.2/A10
P2.4/A12
NC
P2.0/A8
P2.1/A9
SM2958 ihhP 40L PDIP (Top View)
PID 2958 08/00
SyncMOS Technologies Inc.
August 2000 Block Diagram
Stack Pointer Decoder & Register 256 bytes RAM
SM2958
Timer 2
Timer 1
Timer 0
Buffer
RES
Reset Circuit
to pertinent blocks Acc to whole chip Buffer2 Buffer1
DPTR
Vdd Vss Power Circuit
PC Incrementer
Interrupt Circuit
to pertinent blocks
ALU
Program Counter
XTAL2 XTAL1 #EA ALE #PSEN Timing Generator to whole system
PSW
Register
Instruction Register
32K bytes Port 0 Latch Port 1 Latch Port 2 Latch Port 3 Latch Flash Memory
Port 0 Driver & Mux 8
Port 2 Port 3 Driver & Mux Driver & Mux Driver & Mux 8 8 8
Port 1
Specifications subject to change without notice,contact your sales representatives for the most recent information.
3/16
Ver 1.0
PID 2958 08/00
SyncMOS Technologies Inc.
August 2000 Pin Descriptions
40L PDIP Pin# 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 44L 44L QFP PLCC Symbol Pin# Pin# 40 2 T2/P1.0 41 3 T2EX/P1.1 42 4 P1.2 43 5 P1.3 44 6 P1.4 1 7 P1.5 2 8 P1.6 3 9 P1.7 4 10 RES 5 11 RXD/P3.0 7 13 TXD/P3.1 8 14 #INT0/P3.2 9 15 #INT1/P3.3 10 16 T0/P3.4 11 17 T1/P3.5 12 18 #WR/P3.6 13 19 #RD/P3.7 14 20 XTAL2 15 21 XTAL1 16 22 VSS 18 24 P2.0/A8 19 25 P2.1/A9 20 26 P2.2/A10 21 27 P2.3/A11 22 28 P2.4/A12 23 29 P2.5/A13 24 30 P2.6/A14 25 31 P2.7/A15 26 32 #PSEN 27 33 ALE 29 35 #EA/VPP 30 36 P0.7/AD7 31 37 P0.6/AD6 32 38 P0.5/AD5 33 39 P0.4/AD4 34 40 P0.3/AD3 35 41 P0.2/AD2 36 42 P0.1/AD1 37 43 P0.0/AD0 38 44 VDD I/O Active i/o i/o i/o i/o i/o i/o i/o i/o i i/o i/o i/o i/o i/o i/o i/o i/o o i i/o i/o i/o i/o i/o i/o i/o i/o o o i i/o i/o i/o i/o i/o i/o i/o i/o bit 0 of port 1 & timer 2 bit 1 of port 1 & timer control bit 2 of port 1 bit 3 of port 1 bit 4 of port 1 bit 5 of port 1 bit 6 of port 1 bit 7 of port 1 Reset bit 0 of port 3 & Receive data bit 1 of port 3 & Transmit data bit 2 of port 3 & low true interrupt 0 bit 3 of port 3 & low true interrupt 1 bit 4 of port 3 & Timer 0 bit 5 of port 3 & Timer 1 bit 6 of port 3 & ext. memory write bit 7 of port 3 & ext. memory read Crystal out Crystal in Sink Voltage, Ground bit 0 of port 2 & bit 8 of ext. memory address bit 1 of port 2 & bit 9 of ext. memory address bit 2 of port 2 & bit 10 of ext. memory address bit 3 of port 2 & bit 11 of ext. memory address bit 4 of port 2 & bit 12 of ext. memory address bit 5 of port 2 & bit 13 of ext. memory address bit 6 of port 2 & bit 14 of ext. memory address bit 7 of port 2& bit 15 of ext. memory address program storage enable address latch enable external access & VPP bit 7 of port 0 & data/address bit 7 of ext. memory bit 6 of port 0 & data/address bit 6 of ext. memory bit 5 of port 0 & data/address bit 5 of ext. memory bit 4 of port 0 & data/address bit 4 of ext. memory bit 3 of port 0 & data/address bit 3 of ext. memory bit 2 of port 0 & data/address bit 2 of ext. memory bit 1 of port 0 & data/address bit 1 of ext. memory bit 0 of port 0 & data/address bit 0 of ext. memory Drive Voltage, +5 VCC Names
SM2958
H
L/ L/ -
L/ L/ -
L L
Specifications subject to change without notice,contact your sales representatives for the most recent information.
4/16
Ver 1.0
PID 2958 08/00
SyncMOS Technologies Inc.
August 2000 Operating Conditions
Symbol TA VCC5 Fosc 16 Fosc 25 Fosc 40 Description Ambient temperature under bias Supply voltage Oscillator Frequency Min. 0 4.5 3.0 3.0 3.0 Typ. 25 5.0 16 25 40 Max. 70 5.5 16 25 40 Unit. C V MHz MHz MHz SM2958C SM2958C16 SM2958C25 SM2958C40 Remarks
SM2958
DC Characteristics
(12MHz, typical operating conditions, valid for SM2958 series)
Symbol
VIL1 VIL2 VIH1 VIH2 VOL1 VOL2 VOH1 VOH2 IIL ITL ILI R RES C IO I CC
Parameter
Input Low Voltage Input Low Voltage Input High Voltage Input High Voltage Output Low Voltage Output Low Voltage Output High Voltage Output High Voltage Logical 0 Input Current Logical Transition Current Input Leakage Current Reset Pulldown Resistance Pin Capacitance Power Supply Current
Valid
port 0,1,2,3,4,#EA RES, XTAL1 port 0,1,2,3,4,#EA RES, XTAL1 port 0, ALE, #PSEN port 1,2,3,4 port 0 port 1,2,3,4,ALE,#PSEN port 1,2,3,4 port 1,2,3,4 port 0, #EA RES Vdd
Min. -0.5 0 2.0 70%Vcc
Max. 0.8 0.8 Vcc+0.5 Vcc+0.5 0.45 0.45
Unit V V V V V V V V V V uA uA uA Kohm pF mA mA uA
Test Conditions Vcc=5V " " " IOL=3.2mA IOL=1.6mA IOH=-800uA IOH=-80uA IOH=-60uA IOH=-10uA Vin=0.45V Vin=2.0V 0.45V2.4 90%Vcc 2.4 90%Vcc -75 -650 + 10 300 10 20 6.5 150
50
ICC Active mode test circuit Vcc VCC RST SM2958 (NC) Clock Signal XTAL2 XTAL1 VSS PO EA 8 ICC
Vcc
ICC Idle mode test circuit ICC RST SM2958 (NC) Clock Signal XTAL2 XTAL1 VSS VCC PO EA 8
Vcc
Specifications subject to change without notice,contact your sales representatives for the most recent information.
5/16
Ver 1.0
PID 2958 08/00
SyncMOS Technologies Inc.
August 2000
SM2958
AC Characteristics
(16/25/40MHz, operating conditions; CL for Port 0, ALE and PSEN Outputs=150pF; CL for all Other Output=80pF) Symbol T LHLL T AVLL T LLAX T LLIV T LLPL T PLPH T PLIV T PXIX T PXIZ T AVIV T PLAZ T RLRH T WLWH T RLDV T RHDX T RHDZ T LLDV T AVDV T LLYL T AVYL T QVWH T QVWX T WHQX T RLAZ T YALH T CHCL T CLCX T CLCH T CHCX T, TCLCL Parameter ALE pulse width Address Valid to ALE low Address Hold after ALE low ALE low to Valid Instruction In ALE low to #PSEN low #PSEN pulse width #PSEN low to Valid Instruction In Instruction Hold after #PSEN Instruction Float after #PSEN Address to Valid Instruction In #PSEN low to Address Float #RD pulse width #WR pulse width #RD low to Valid Data In Data Hold after #RD Data Float after #RD ALE low to Valid Data In Address to Valid Data In ALE low to #WR High or #RD low Address Valid to #WR or #RD low Data Valid to #WR High Data Valid to #WR transition Data hold after #WR #RD low to Address Float #WR or #RD high to ALE high clock fall time clock low time clock rise time clock high time clock period Valid Cycle RD/WRT RD/WRT RD/WRT RD RD RD RD RD RD RD RD RD WRT RD RD RD RD RD RD/WRT RD/WRT WRT WRT WRT RD RD/WRT fosc=16MHz Min. Typ. Max 115 43 53 240 53 173 177 0 87 292 10 365 365 302 0 145 590 542 178 197 230 403 38 73 53 Variable fosc Unit Min. Typ. Max 2xT - 10 nS T - 20 nS T - 10 nS 4xT - 10 nS T - 10 nS 3xT - 15 nS 3xT - 10 nS 0 nS T + 25 nS 5xT - 20 nS 10 nS 6xT - 10 nS 6xT - 10 nS 5xT - 10 nS 0 nS 2xT + 20 nS 8xT - 10 nS 9xT - 20 nS 3xT - 10 3xT + 10 nS 4xT - 20 nS 7xT - 35 nS T - 25 nS T + 10 nS 5 nS 72 T -10 T + 10 nS nS nS nS nS 1/fosc nS Remarks
63
Specifications subject to change without notice,contact your sales representatives for the most recent information.
6/16
Ver 1.0
PID 2958 08/00
SyncMOS Technologies Inc.
August 2000 Application Reference Valid for SM2958
X'tal C1 C2 R X'tal C1 C2 R 3MHz 30 pF 30 pF open 16MHz 30 pF 30 pF open 6MHz 30 pF 30 pF open 25MHz 15 pF 15 pF 62K 9MHz 30 pF 30 pF open 33MHz 10 pF 10 pF 6.8K 12MHz 30 pF 30 pF open 40MHz 5 pF 5 pF note
R X2 C1 C2 XI X'tal
SM2958
SM2958
Note: Oscillation circuit may differs with different crystal or ceramic resonator in higher oscillation frequency which was due to each crystal or ceramic resonator has its own characteristics. User should check with the crystal or ceramic resonator manufacture for appropriate value of external components. Please see SM2958 application note for details.
Data Memory Read Cycle Timing
T12 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T1 T2 T3
OSC
1 2
ALE
#PSEN
#RD
5
7
3
PORT2
ADDRESS A15 - A8
3
4 Float
6 DATA in
8 Float ADDRESS or Float
PORT0
INST in Float
A7 - A0
Specifications subject to change without notice,contact your sales representatives for the most recent information.
7/16
Ver 1.0
PID 2958 08/00
SyncMOS Technologies Inc.
August 2000 Program Memory Read Cycle Timing
T12 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T1 T2
SM2958
OSC ALE
1
2
#PSEN #RD,#WR
5
7
PORT2
3 ADDRESS A15 - A8 ADDRESS A15 - A8
PORT0
3 Float A7 - A0
4 Float
6 INST in
8 Float A7 - A0 Float INST in Float
Data Memory Write Cycle Timing
T12 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T1 T2 T3
OSC
1
ALE
#PSEN
#WR
5
6
2
PORT2
2
ADDRESS A15 - A8
3 DATA OUT
4 ADDRESS or Float
PORT0
INST
Float
A7 - A0
Specifications subject to change without notice,contact your sales representatives for the most recent information.
8/16
Ver 1.0
PID 2958 08/00
SyncMOS Technologies Inc.
August 2000
SM2958
I/O Ports Timing
T6 T7 T8 T9 T10 T11 T12 T1 T2 T3 T4 T5 T6 T7 T8
X1 inputs P0,P1
sampled
sampled
inputs P2,P3 Output by Mov Px,Src RxD at Serial Port Shift Clock (Mode 0)
current data next data
sampled
Timing Critical, Requirement of External Clock (Vss=0.0V is assumed)
TCLCL
Vdd-0.5V
70%Vdd
0.45V
20%Vdd-0.1V TCHCL TCLCX TCLCH TCHCX
Tm.I
#PSEN ALE PORT 0
External Program Memory Read Cycle
TPLPH
TLHLL TAVLL A0 - A7
TLLPL TLLAX TPLAZ TPLIV
TPXIZ TPXIX Instruction. IN A0 - A7
TAVIV
PORT 2
A8 - A15
A8 - A15
Specifications subject to change without notice,contact your sales representatives for the most recent information.
9/16
Ver 1.0
PID 2958 08/00
SyncMOS Technologies Inc.
August 2000 Tm.II External Data Memory Read Cycle
SM2958
#PSEN
TYHLH
ALE
TLLDV TLLYL TRLRH
#RD
TAVLL
TLLAX TRLAZ A0 - A7 from Ri or DPL TAVYL TAVDV
TRLDV
TRHDZ TRHDX DATA IN A0 - A7 from PCL INSTRL IN
PORT 0
PORT 2
P2.0 - P2.7 or A8 - A15 from DPH
A8 - A15 from PCH
Tm.III External Data Memory Write Cycle
#PSEN
TLHLL
TYHLH
ALE
TLLYL TWLWH
#WR
TAVLL TLLAX
TQVWX
TQVWH
TWHQX
PORT 0
A0-A7 from Ri or DPL
DATA OUT
A0-A7 From PCL
INSTRL IN
TAVYL
PORT 2
P2.0-P2.7 or A8-A15 from DPH
A8-A15 from PCH
Specifications subject to change without notice,contact your sales representatives for the most recent information.
10/16
Ver 1.0
PID 2958 08/00
SyncMOS Technologies Inc.
August 2000
SM2958
40L 600mil PDIP Information
E S D E1
A1
A2 A
C
L e1 B1 B
eA a
Note: 1. Dimension D Max & include mold flash or tie bar burrs. 2. Dimension E1 does not include inter lead flash. 3. Dimension D & E1 include mold mismatch and are determined at the mold parting line. 4. Dimension B1 does not include dam bar protrusion/ infusion. 5. Controlling dimension is inch. 6. General appearance spec. should base on final visual inspection spec.
Symbol A A1 A2 B B1 C D E E1 e1 L a eA S
Dimension in inch minimal/maximal - / 0.210 0.010 / 0.150 / 0.160 0.016 / 0.022 0.048 / 0.054 0.008 / 0.014 - / 2.070 0.590 / 0.610 0.540 / 0.552 0.090 / 0.110 0.120 / 0.140 0 / 15 0.630 / 0.670 - / 0.090
Dimension in mm minimal/maximal - / 5.33 0.25 / 3.81 / 4.06 0.41 / 0.56 1.22 / 1.37 0.20 / 0.36 - / 52.58 14.99 / 15.49 13.72 / 14.02 2.29 / 2.79 3.05 / 3.56 0 / 15 16.00 / 17.02 - / 2.29
Specifications subject to change without notice,contact your sales representatives for the most recent information.
11/16
Ver 1.0
PID 2958 08/00
SyncMOS Technologies Inc.
August 2000 44L Plastic Chip Carrier (PLCC)
6 7 L
SM2958
E
HE y
GE
D HD A2 A A1
C
b1 e GD
b
Note: 1. Dimension D & E does not include inter lead flash. 2. Dimension b1 does not include dam bar protrusion/ intrusion. 3. Controlling dimension: Inch 4. General appearance spec. should base on final visual inspection spec.
Symbol A A1 A2 b1 b C D E e GD GE HD HE L
y
Dimension in inch minimal/maximal - / 0.185 0.020 / 0.145 / 0.155 0.026 / 0.032 0.016 / 0.022 0.008 / 0.014 0.648 / 0.658 0.648 / 0.658 0.050 BSC 0.590 / 0.630 0.590 / 0.630 0.680 / 0.700 0.680 / 0.700 0.090 / 0.110 - / 0.004 /
Dimension in mm minimal/maximal - / 4.70 0.51 / 3.68 / 3.94 0.66 / 0.81 0.41 / 0.56 0.20 / 0.36 16.46 / 16.71 16.46 / 16.71 1.27 BSC 14.99 / 16.00 14.99 / 16.00 17.27 / 17.78 17.27 / 17.78 2.29 / 2.79 - / 0.10 /
Specifications subject to change without notice,contact your sales representatives for the most recent information.
12/16
Ver 1.0
PID 2958 08/00
SyncMOS Technologies Inc.
August 2000
SM2958
44L Plastic Quad Flat Package
C L S e L1 2 R1 D2 D1 D b A2 3 R2 A1 Gage Plane 0.25 mm
E2 E1 E e1 A
seating plane e
C
Note: Dimension D1 and E1 do not include mold protrusion. Allowance protrusion is 0.25mm per side. Dimension D1 and E1 do include mold mismatch and are determined datum plane. Dimension b does not include dam bar protrusion. Allowance dam bar protrusion shall be 0.08 mm total in excess of the b dimension at maximum material condition. Dam bar cannot be located on the lower radius or the lead foot.
Symbol A A1 A2 b c D D1 D2 E E1 E2 e L L1 R1 R2 S 1 2 3 C
Dimension in Inch minimal/maximal - / 0.100 0.006 / 0.014 0.071 / 0.087 0.012 / 0.018 0.004 / 0.009 0.520 BSC 0.394 BSC 0.315 0.520 BSC 0.394 BSC 0.315 0.031 BSC 0.029 / 0.041 0.063 0.005 / 0.005 / 0.012 0.008 / 0 / 7 0 / 10 REF 7 REF 0.004
Dimension in mm minimal/maximal - / 2.55 0.15 / 0.35 1.80 / 2.20 0.30 / 0.45 0.09 / 0.20 13.20 BSC 10.00 BSC 8.00 13.20 BSC 10.00 BSC 8.00 0.80 BSC 0.73 / 1.03 1.60 0.13 / 0.13 / 0.30 0.20 / as left as left as left as left 0.10
Specifications subject to change without notice,contact your sales representatives for the most recent information.
13/16
Ver 1.0
PID 2958 08/00
SyncMOS Technologies Inc.
August 2000
SM2958
eMCU writer list
Company Advantech 7F, No.98, Ming-Chung Rd., Shin-Tien City, Taipei, Taiwan, ROC Web site: http://www.aec.com.tw Caprilion P.O. Box 461 KaoHsiung, Taiwan, ROC Web site: http://www.market.net.tw/ ~ cap/ Hi-Lo 4F, No. 20, 22, LN, 76, Rui Guang Rd., Nei Hu, Taipei, Taiwan, ROC. Web site: http://www.hilosystems.com.tw Leap 6th F1-4, Lane 609, Chunghsin Rd., Sec. 5, Sanchung, Taipei Hsien, Taiwan, ROC Web site: http://www.leap.com.tw Xeltek Electronic Co., Ltd 338 Hongwu Road, Nanjing, China 210002 Web site: http://www.xeltek-cn.com Contact info Tel:02-22182325 Fax:02-22182435 E-mail: aecwebmaster@advantech.com.tw Programmer Model Number LabTool - 48 ( 1 * 1 ) LabTool - 848 (1*8)
Tel:07-3865061 Fax:07-3865421 E-mail: cap@market.net.tw
UNIV2000
Tel:02-87923301 Fax:02-87923285 E-mai: support@hilosystems.com.tw
All - 11 (1*1) Gang - 08 (1*8)
Tel:02-29991860 Fax:02-29990015 E-mail: service@leap.com.tw
ChipStation (1*1) SU - 2000 (1*8)
Tel:+86-25-4408399, 4543153-206 E-mail: xelclw@jlonline.com, xelgbw@jlonline.com
Superpro/2000 (1*1) Superpro/680 (1*1) Superpro/280 (1*1) Superpro/L+(1*1)
Specifications subject to change without notice,contact your sales representatives for the most recent information.
14/16
Ver 1.0
PID 2958 08/00
SyncMOS Technologies Inc.
August 2000 Feedback / Inquiry: To Attn Fax Tel :SyncMOS Technologies, Inc. :MKT / Customer Service Dept. :886-3-579-2960 :886-3-578-0493 :886-3-579-2988 :886-3-579-2926 From Company : :
SM2958
Dept, Section : Position Title Inquiry Date Ref No : : :
:
Request customer logo as below:
Specifications subject to change without notice,contact your sales representatives for the most recent information.
15/16
Ver 1.0
PID 2958 08/00
SyncMOS Technologies Inc.
August 2000 SM2958 Application Note
For normal operation under relatively noisy environment, it is recommended that: (1) /PSEN signal being connected to VSS through a pull-low resistor R of value ~ 47 with internal program memory addressing mode used, and/or SM2958 /PSEN R ~ ~ 47
SM2958
*Updated 09/00
(2) ALE signal being connected to VDD through a pull-high resistor R of value ~ 100 with internal program memory addressing mode used. SM2958 Note: If IC operated under normal environment, above circuit modification may not needed. ALE
Vcc R ~ ~ 100
40MHz oscillation circuit, for general quality crystal and resonator X1 X'tal 40MHz 4.7k 1M 5pF 5pF X2 SM2958
Oscillation circuit for very large noise environment. For example, massage machine which driving 10 DC motors in 6MHz oscillation frequency X1 X'tal 6MHz X2 SM2958 p0 p3
M 8 2 M
M
M
M
M
M
M
M
M
Specifications subject to change without notice,contact your sales representatives for the most recent information.
16/16
Ver 1.0
PID 2958 08/00

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