TH50VSF3680 Datasheet, PDF (24/55 Pages) Toshiba Semiconductor – SRAM AND FLASH MEMORY MIXED MULTI-CHIP PACKAGE

SIMULTANEOUS READ/WRITE OPERATION
TH50VSF3680/3681AASB
The TH50VSF3680/3681AASB features a Simultaneous Read/Write operation. The Simultaneous Read/Write
operation enables the device to simultaneously write data to or erase data from a bank while the device reads data
from another bank.
The TH50VSF3680/3681AASB has a total of seventeen banks: 0.5 Mbits × 1 bank, 3.5 Mbits × 1 bank, and 4 Mbits
× 15 banks. Banks are switched using bank addresses (A20 to A15). For bank blocks and addresses, refer to the
Block Address Table and Block Size Table.
The Simultaneous Read/Write operation cannot perform multiple operations in a bank. The table below shows the
operating modes in which simultaneous operation can be performed.
Note that during Auto Program execution or Auto Block Erase operation, the Simultaneous Read/Write operation
cannot read data from addresses which are not selected for operation in the same bank. Data from such addresses
can be read using the Program Suspend or Erase Suspend function.
SIMULTANEOUS READ/WRITE OPERATION
ONE BANK STATUS
OTHER BANK STATUS
Read mode
ID Read mode⁽¹⁾
Auto Program mode
Fast Program mode⁽²⁾
Program Suspend mode
Auto Block Erase mode
Auto Multiple Block Erase mode⁽³⁾
Erase Suspend mode
Program Suspend while Erase Suspend
CFI mode
(1) Command mode only is valid.
(2) Includes when Acceleration mode is in use.
(3) If the selected bank exists in all banks, simultaneous operation is not supported.
Read mode
OPERATING MODES
In addition to Read, Write, and Erase modes, the TH50VSF3680/3681AASB features many functions including
Block Protect and Data Polling. When using the device, reference the timing charts and flow charts together with
the description below.
Read Mode
To read data from the memory cell array, set the device to Read mode. In Read mode, the device can perform
high-speed random access as asynchronous ROM.
The device is automatically set to Read mode immediately after power on or after completion of automatic
operation. A software reset releases ID Read mode and the lock state when automatic operation ends abnormally,
and sets to Read mode. A hardware reset terminates operation of the device and resets to Read mode. When
reading the data without changing the address immediately after power on, either input a hardware reset or
change CEF from H to L.
2001-03-06 24/55