NAND128W3A0AN6 STMicroelectronics, NAND128W3A0AN6 Datasheet - Page 20

• Manufacturer Part Number: NAND128W3A0AN6
• Description: IC FLASH 128MBIT 48TSOP
• Manufacturer: STMicroelectronics

Specifications of NAND128W3A0AN6

• Format - Memory: FLASH
• Memory Type: FLASH - Nand
• Memory Size: 128M (16M x 8)
• Interface: Parallel
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-TSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Speed: -

NAND128-A, NAND256-A, NAND512-A, NAND01G-A
DEVICE OPERATIONS
Pointer Operations
As the NAND Flash memories contain two differ-
ent areas for x16 devices and three different areas
for x8 devices (see
codes (00h, 01h, 50h) are used to act as pointers
to the different areas of the memory array (they se-
lect the most significant column address).
The Read A and Read B commands act as point-
ers to the main memory area. Their use depends
on the bus width of the device.
Figure 11. Pointer Operations
Figure 12. Pointer Operations for Programming
20/56
I/O
I/O
I/O
Areas B, C can be programmed depending on how much data is input. The 01h command must be re-issued before each program.
In x16 devices the Read A command (00h)
sets the pointer to Area A (the whole of the
main area) that is Words 0 to 255.
In x8 devices the Read A command (00h) sets
the pointer to Area A (the first half of the main
area) that is Bytes 0 to 255, and the Read B
command (01h) sets the pointer to Area B (the
Areas A, B, C can be programmed depending on how much data is input. Subsequent 00h commands can be omitted.
00h
01h
50h
Bytes 0- 255
Area A
(00h)
A
80h
80h
80h
Figure
(00h,01h,50h)
Only Areas C can be programmed. Subsequent 50h commands can be omitted.
x8 Devices
Bytes 256-511 Bytes 512
Pointer
Address
Address
Address
Area B
Inputs
Inputs
Inputs
(01h)
11.) the read command
B
Data Input
Data Input
Data Input
Area C
(50h)
-527
C
Page Buffer
10h
10h
10h
AREA A
AREA B
AREA C
In both the x8 and x16 devices the Read C com-
mand (50h), acts as a pointer to Area C (the spare
memory area) that is Bytes 512 to 527 or Words
256 to 263.
Once the Read A and Read C commands have
been issued the pointer remains in the respective
areas until another pointer code is issued. Howev-
er, the Read B command is effective for only one
operation, once an operation has been executed
in Area B the pointer returns automatically to Area
A.
The pointer operations can also be used before a
program operation, that is the appropriate code
(00h, 01h or 50h) can be issued before the pro-
gram command 80h is issued (see
00h
01h
50h
second half of the main area) that is Bytes 256
to 511.
80h
80h
80h
Words 0- 255
x16 Devices
Area A
(00h)
A
Address
Address
Address
Inputs
Inputs
Inputs
(00h,50h)
Pointer
Data Input
Data Input
Data Input
Words 256
Area C
(50h)
-263
C
Figure
Page Buffer
10h
10h
10h
AI07592
12.).
ai07591