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Preliminary Specifications
CMOS LSI
LE25FV101T 1M (128k words x 8bits) Serial Flash EEPROM
Features
CMOS Flash EEPROM Technology Single 3.3-Volt Read and Write Operations Sector Erase Capability: 256 Bytes per sector Operating Frequency: 10MHz Low Power Consumption Active Current (Read): 25 mA (Max.) Standby Current: 20 A (Max.) Serial Peripheral Interface (S.P.I.) mode 0. High Read/Write Reliability Sector-write Endurance Cycles: 104 10 Years Data Retention Self-timed Erase and Programming Byte Programming: 35 s (Max.) End of Write Detection: Status Register Read Hardware Data Protection Packages Available: MSOP8(225mil)
Product Description
The LE25FV101T is a 128K x 8 CMOS sector erase, byte programmable serial Flash EEPROM. The LE25FV101T is manufactured using SANYO's proprietary, high performance CMOS Flash EEPROM technology. Breakthroughs in EEPROM cell design and process architecture attain better reliability and manufacturability compared with conventional approaches. The LE25FV101T erases and programs with a 3.3-volt only power supply. LE25FV101T conforms to Serial Peripheral Interface (S.P.I.). Featuring high performance programming, the LE25FV101T typically byte programs in 35 s. The LE25FV101T typically sector (256 bytes) erases in 4ms. Both program and erase times can be optimized using interface feature such as Status Register to indicate the completion of the write cycle. To protect against an inadvertent write, the LE25FV101T has on chip hardware data protection scheme. Designed, manufactured, and tested for a wide spectrum of applications, the LE25FV101T is offered with a guaranteed sector write endurance of 104 cycles. Data retention is rated greater than 10 years. The LE25FV101T is best suited for applications that require re-programmable nonvolatile mass storage of program or data memory.
Device Operation
Commands are used to initiate the memory operation functions of the device. Commands are written to the command register through serial input (SI). The addresses and data of Commands are latched to be used to operate functions such as Read, Sector_Erase, Byte_Program and so on. Fig.3 and Fig.4 contain the timing waveforms of serial input and output. By setting CS to LOW, the device is selected. And commands, addresses, and dummy bits can be let in serially through SI port. When the device is in Read or Status Register Read mode, SO pin is in Low-impedance state. And the requested data can be read out from MSB (most significant bit) synchronously with the falling edge of SCK.
WP Vcc CS SCK
1 2 3 4
8 7 6 5
RESET Vss SO SI
Figure1: Pin Assignment for 8-pin MSOP
*This product incorporate technology licensed from Silicon Storage Technology, Inc. This preliminary specification is subject to change without notice.
SANYO Electric Co., Ltd. Semiconductor Company
1-1, 1 Chome, Sakata, Oizumi-machi, Ora-gun, GUNMA, 370-0596 JAPAN Revision c-November 1,1999-KI/ki-1/9
LE25FV101T 3.3V-only 1M-Bit Serial Flash EEPROM
Preliminary Specifications
ADDRESS BUFFERS & LATCHES
XDECODER
1,048,576 Bit Flash EEPROM Cell Array
Y-DECODER
CONTROL LOGIC
I/O B U F F E R S & DATA LATCHES
SERIAL
INTERFACE
CS
SCK
SI
SO
WP
RESET
Figure2: Functional Block Diagram of LE25FV101T
Table1: Pin Description
Symbol SCK Pin Description Serial Clock Functions To control the timing of serial data input and output. To latch input data and addresses synchronously at the rising edge of SCK, and read out output data synchronously at this falling edge. To input data or addresses serially from MSB to LSB (Least Significant Bit). To output data serially from MSB to LSB. To activate the device when this pin is LOW. To deselect and put the device to standby mode when High. To prevent inadvertent write when this pin is LOW. As WP is connected internally to the Vcc, leave this pin open when this function is not necessary. To provide 3.0V to 3.6V supply.
SI SO
CS
Serial Input Serial Output Chip Select Write Protect
WP
Vcc Vss
RESET
Power Supply Ground Reset
To prevent inadvertent writes by setting this pin to LOW during system power-up. As RESET is connected to Vcc internally, leave this pin open when this function is not necessary.
Table2: Commands Summary
Command 1st bus cycle 2nd bus cycle 3rd bus cycle 4th bus cycle 5th bus cycle 6th bus cycle OPcode Address Address Address Data / OPcode Dummy FFH A23-A16 A15-A8 A7-A0 X X 20H A23-A16 A15-A8 X D0H X 10H A23-A16 A15-A8 A7-A0 PD X 9FH FFH
Read Sector Erase Byte Program Status Register Reset Definition for table 2: 1. X= don't care, H= number in hex. 2. A17-A23=don't care 3. PD= Program data 4. Reset Command is effective when the device is only in Erase or Program sequence (in tBP or tSE period).
SANYO Electric Co., Ltd.
2/9
LE25FV101T 3.3V-only 1M-Bit Serial Flash EEPROM
Preliminary Specifications
Command Definition
Table 2 contains a command list and a brief summary of the commands. The following is a detailed description of the options initiated by each command.
Read
Fig.5 shows the timing waveform of read operation. The read operation is initiated by READ command. After writing OPcode of "FFH" and following 24bit address and 16 dummy bits, SO is transformed into Low-impedance state, and the specified addresses' data are read out synchronously with SCK clock. While the SCK clock is continuously on, the device counts up the next address automatically and reads the data in order. When the address reaches its maximum, while the read operation still be continuing, the address is reset to the lowest one, and the device continues reading data from the beginning. When CS is set High so as to deselect the device, the read operation terminates with the output in Highimpedance state. Do not execute read operation while the device is in Byte_Program or Sector_Erase Cycle to prevent inadvertent writes.
memory contents within the addressed sector are erased and other sectors are not inadvertently erased. The erase operation begins with the rising edge of the CS pulse and terminates automatically by using an internal timer. Termination of this mode is found out by using Status Register Read.
Byte_Program Fig.8 shows the timing waveform of Byte_Program. Byte_Program command consists of 6 bus cycles from 1st bus cycle to 6th bus cycle, and stages the device for Byte programmable. To execute the Byte_Program operation, program address, program data and Dummy bits must be written to the command register after writing the OPcode of (10H). The program operation begins with the rising edge of the CS pulse and terminates automatically by using an internal timer. Termination of this mode is found out by using Status Register Read.
Reset
Fig.9 shows the timing waveform of Reset operation. Reset operation is effective while the device is already in Program or Erase mode. But the data of specified address are not guaranteed. The Reset Command can be provided as a means to safely abort the Erase or Program Command sequences. Following 4th bus cycles (erase or program) with a write of (FFH) in 5th bus cycle will safely abort the operation. Memory contents will not be altered.
Status_Register Read
Fig.6 shows the timing waveform of Status_Register Read. Status_Register can be read while the device is in Program or Erase mode. As is shown in the table below, the LSB (Least Significant Bit) of Status_Register is set to BSY with other bits intact. By setting CS to LOW and writing "9FH" in command register, the contents of the Status_Register come out from MSB. The LSB of the Status_Register stands for if the device is busy or not. Therefore,"0" stands for busy and "1" for not in Program or Erase mode. When CS goes High, Status Register reading terminates with the output pin in High-impedance state.
7(MSB) X 6 X 5 X 4 X 3 X 2 X 1 X 0(LSB)
BSY
Hardware Write Protection
Setting WP to LOW prevents inadvertent writes by inhibiting write operation. As WP is connected internally to the Vcc, don't connect externally to any nodes when this function is not necessary. To prevent inadvertent writes during system power-up, LE25FV101T has power-onreset circuit. To perform power up more safely, the usage of RESET is recommended as follows. By holding RESET LOW during system power up and setting to High after Vcc reaches operation voltage, inadvertent writes can be prevented (see Fig.10). Don't use this function except during power up. As RESET is connected to Vcc internally, don't connect externally to any nodes when this function is not necessary.
Sector_Erase
Fig.7 shows the timing waveform of Sector_Erase. Sector_Erase command consists of 6 bus cycles from 1st bus cycle to 6th bus cycle. This command stages the device for electrical erasing of all bytes within a sector. A sector contains 256 bytes. This sector erasability enhances the flexibility and usefulness of the LE25FV101T, since most applications only need to change a small number of bytes or sectors, not the entire chip. To execute the Sector_Erase operation, erase address, 2nd OPcode (D0H) and Dummy bits must be written to the command register after writing 1st OPcode of (20H). This two-step sequence ensures that only
Decoupling Capacitors
Ceramic capacitors (0.1 F) must be added between VCC and VSS to each device to assure stable flash memory operation.
SANYO Electric Co., Ltd.
3/9
LE25FV101T 3.3V-only 1M-Bit Serial Flash EEPROM
Preliminary Specifications
Absolute Maximum Stress Ratings
Storage Temperature ..............................................................-55 C ~ 150 C Supply Voltage .......................................................................-0.5 V ~ 4.6 V D.C. Voltage on Any Pin to Grand Potential ...........................-0.5 V ~ Vcc + 0.5 V
Permanent device damage may occur if ABSOLTE MAXIMUM RATINGS are exceeded.
Operating Range
Ambient Temperature.............................................................0 C ~ 70 C Vcc.........................................................................................3.0 V ~ 3.6 V
DC Operating Characteristics
Symbol Parameter Min. ICCR ICCW ISB1 ISB2 ILI ILO VIL VIH VOL VOH Power Supply Current (Read) Power Supply Current (Write) Standby Vcc Current (TTL input) Standby Vcc Current (CMOS input) Input Leakage Current Output Leakage Current Input Low Voltage Input High Voltage Output Low Voltage Output High Voltage Vcc-0.2 -0.3 2.4 10 10 0.4 Vcc+0.3 0.2 A A V V V V 20 A 3 mA 45 mA Limit Max. 10 mA unit Test Condition
CS = VIL
SO, WP open
SI = VIL / VIH, f = 10MHz, VCC = VCC max. VCC = VCC max.
CS = VIH CS = VCC-0.3V
SO, WP , RESET open SO, WP , RESET open
VCC = VCC max. VCC = VCC max. VIN = VSS ~ VCC, VCC = VCC max. VIN = VSS ~ VCC, VCC = VCC max. VCC = VCC max. VCC = VCC min. IOL = 100 A, VCC = VCC min. IOH = -100 A, VCC = VCC min.
Power-up Timing
Symbol tPU_READ tPU_WRITE tPU_RST Parameter Power-up to Read Operation(without using RESET ) Power-up to Write Operation(without using RESET ) From RESET goes High to Command Entry Minimum 10 10 1 Units ms ms s
Capacitance (Ta = 25 C, f = 1 MHz)
Symbol CDQ Description DQ Pin Capacitance Maximum 12 6 Unit pF pF Test Condition VDQ = 0V VIN = 0V
CIN Input Capacitance Note: These parameters are periodically sampled and are not 100% tested.
SANYO Electric Co., Ltd.
4/9
LE25FV101T 3.3V-only 1M-Bit Serial Flash EEPROM
Preliminary Specifications
AC Characteristics
Symbol fCLK tCSS tCSH tCPH tCHZ tDS tDH tCLH tCLL tCLZ tV tHO tSE tBP tRST Clock Frequency
CS setup time CS hold time CS standby pulse width CS to Hi-Z output
Parameter Min. 400 400 250
Limit Max. 10
unit MHz ns ns ns 250 ns ns ns ns ns ns 40 ns ns 4 35 4 ms s s
Data Setup time Data hold time SCK High pulse width SCK Low pulse width SCK to Lo-Z output SCK to output valid Output data hold time Sector Erase Cycle Time Byte Program Cycle time Write Reset Recovery Time
30 30 45 45 0 0
AC Test Conditions Input Pulse Level ..................................................... 0 V ~ 3.0 V Input Rise/Fall Time.................................................. 5 ns Input/Output Timing Level ...................................... 1.5V Input Load Levels...................................................... 30 pF
SANYO Electric Co., Ltd.
5/9
LE25FV101T 3.3V-only 1M-Bit Serial Flash EEPROM
Preliminary Specifications
Figure 3: Serial Input Timing Diagram
tCPH
CS SCK SI SO
tcss
tCSH tDH
tDS
DATA VALID
High Impedance
High Impedance
Figure 4: Serial Output Timing Diagram
CS
tCLH tCLL
SCK
tCLZ tHO
DATA VALID
tCSH tCHZ
SO
tV
SI
SANYO Electric Co., Ltd.
6/9
LE25FV101T 3.3V-only 1M-Bit Serial Flash EEPROM
Preliminary Specifications
Figure 5: Read Cycle Timing Diagram
CS
012345678 15 16 23 24 31 32 39 40 47 48 55 56 63 64 71
SCK SI SO
FFH Add. Add. Add. X X
N N+1
DATA MSB
N+2
DATA MSB
High Impedance
DATA MSB
Figure 6: Status Register Read Timing Diagram
CS
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 23 24 31
SCK SI SO
9FH
High Impedance
MSB
DATA
DATA MSB
DATA MSB
SANYO Electric Co., Ltd.
7/9
LE25FV101T 3.3V-only 1M-Bit Serial Flash EEPROM
Preliminary Specifications
Figure 7: Sector_Erase Timing Diagram
Self-timed Sector Erase Cycle t SE
CS
012345678 15 16 23 24 31 32 39 40 47
SCK SI SO
20H Add. Add. X D0H X
High Impedance
Figure 8: Byte_Program Timing Diagram
Self-timed Byte Program Cycle t BP
CS
012345678 15 16 23 24 31 32 39 40 47
SCK SI SO
10H Add. Add. Add. PD X
High Impedance
SANYO Electric Co., Ltd.
8/9
LE25FV101T 3.3V-only 1M-Bit Serial Flash EEPROM
Preliminary Specifications
Figure 9: Reset Timing Diagram Reset Command is effective when the device is only in Erase or Program sequence (in tBP or tSE period).
t RST
CS
01234567
SCK SI SO
FFH
High Impedance
Figure 10: Command Entry Recover Timing from RESET goes High
Vcc
t PU_RST
RESET
SANYO Electric Co., Ltd.
9/9

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