TH58NVG5S0FTA20 Datasheet, PDF (50/73 Pages) Toshiba Semiconductor – 32 GBIT (4G × 8 BIT) CMOS NAND E2PROM

TOSHIBA CONFIDENTIAL TH58NVG5S0FTA20
Auto Block Erase
The Auto Block Erase operation starts on the rising edge of WE after the Erase Start command “D0h” which
follows the Erase Setup command “60h”. This two-cycle process for Erase operations acts as an extra layer of
protection from accidental erasure of data due to external noise. The device automatically executes the Erase
and Verify operations.
RY / BY
60
Block Address
input: 3 cycles
D0
Erase Start
command
Busy
70
Status Read
command
Pass
I/O
Fail
Multi Block Erase
The Multi Block Erase operation starts by selecting two block addresses before D0h command as in below
diagram. The device automatically executes the Erase and Verify operations and the result can be monitored by
checking the status by 71h status read command. For details on 71h status read command, refer to section
“Multi Page Program with Data Cache”.
60
60
D0
Pass
71
I/O
Block Address
input: 3 cycles
District 0
Block Address ^{Erase Start}
input: 3 cycles ^command
District 1
Status Read
Fail
command
RY / BY
Busy
Internal addressing in relation with the Districts
To use Multi Block Erase operation, the internal addressing should be considered in relation with the District.
• The device contains four chips of NAND EEPROM.
• Each internal chip consists from 2 Districts.
• Each District consists from 2048 erase blocks.
• The allocation rule is follows.
(a) District 0: Block 0, Block 2, Block 4, Block 6,···, Block 4094
(b) District 1: Block 1, Block 3, Block 5, Block 7,···, Block 4095
(c) District 0: Block 4096, Block 4098, Block 4100, Block 4102,···, Block 8190
(d) District 1: Block 4097, Block 4099, Block 4101, Block 4103,···, Block 8191
Combination of (a) and (b) or (c) and (d) can only be selected.
Address input restriction for the Multi Block Erase
There are following restrictions in using Multi Block Erase
(Restriction)
District0 and District1 should be selected within the same chip.
Maximum one block should be selected from each District.
For example;
(60) [District 0] (60) [District 1] (D0)
(Acceptance)
There is no order limitation of the District for the address input.
For example, following operation is accepted;
(60) [District 1] (60) [District 0] (D0)
It requires no mutual address relation between the selected blocks from each District.
Make sure to terminate the operation with D0h command. If the operation needs to be terminated before D0h
command input, input the FFh reset command to terminate the operation.
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2010-12-13C