TH50VSF2582 Datasheet, PDF (21/50 Pages) Toshiba Semiconductor – SRAM AND FLASH MEMORY MIXED MULTI-CHIP PACKAGE

Command Write
TH50VSF2582/2583AASB
The TH50VSF2582/2583AASB uses the standard JEDEC control commands for a single-power supply
E²PROM. A Command Write is executed by inputting the address and data into the Command Register. The
command is written by inputting a pulse to WE with CEF = VIL and OE = VIH ( WE control). The
command can also be written by inputting a pulse to CEF with WE = VIL ( CEF control). The address is
latched on the falling edge of either WE or CEF . The data is latched on the rising edge of either WE or
CEF . DQ0~DQ7 are valid for data input and DQ8~DQ15 are ignored.
To abort input of the command sequence use the Reset command. The device will reset the Command Register
and enter Read Mode. If an undefined command is input, the Command Register will be reset and the device
will enter Read Mode.
Software Reset
Apply a software reset by inputting a Read/Reset command. A software reset returns the device from ID Read
Mode or CFI Mode to Read Mode, releases the lock state if automatic operation has ended abnormally, and
clears the Command Register.
Hardware Reset
A hardware reset initializes the device and sets it to Read Mode. When a pulse is input to RESET for tRP,
the device abandons the operation which is in progress and enters Read Mode after tREADY. Note that if a
hardware reset is applied during data overwriting, such as a Write or Erase operation, data at the address or
block being written to at the time of the reset will become undefined.
After a hardware reset the device enters Read Mode if RESET = VIH or Standby Mode if RESET = VIL.
The DQ pins are High-Impedance when RESET = VIL. After the device has entered Read Mode, Read
operations and input of any command are allowed.
Comparison between Software Reset and Hardware Reset
ACTION
Releases ID Read Mode or CFI Mode.
Clears the Command Register.
Releases the lock state if automatic operation has ended abnormally.
Stops any automatic operation which is in progress.
Stops any operation other than the above and returns the device to
Read Mode.
SOFTWARE RESET
True
True
True
False
False
HARDWARE RESET
True
True
True
True
True
BYTE /Word Mode
CIOF is used select Word Mode (16 bits) or Byte Mode (8 bits) for the TH50VSF2582/2583AASB. If VIH is
input to CIOF, the device will operate in Word Mode. Read data or write commands using DQ0~DQ15. When
VIL is input to CIOF, read data or write commands using DQ0~DQ7. A12F is used as the lowest address.
DQ8~DQ14 will become High-Impedance.
2001-10-25 21/50