V29C31004T Mosel Vitelic Corp, V29C31004T Datasheet - Page 10

• Manufacturer Part Number: V29C31004T
• Description: 4 MEGABIT 524/288 x 8 BIT 3.3 VOLT CMOS FLASH MEMORY
• Manufacturer: Mosel Vitelic Corp

MOSEL VITELIC
written. While in the internal erase mode, the
device ignores any program attempt into the
device. The internal erase completion can be
determined via DATA polling or toggle bit status.
erased (all bits = 1).
Chip Erase Cycle
erase operation. The chip erase operation is
i n i t i a t e d b y u s i n g a s p e c i f i c s i x - b u s - c y c l e
sequence: two unlock program cycles, a setup
command, two additional unlock program cycles,
and the chip erase command (see Table 2).
the last WE or CE pulse in the command sequence
and terminates when the data on DQ7 is “1”.
Program Cycle Status Detection
of the V29C31004T/V29C31004B during a
program (erase/write) cycle: DATA Polling (I/O
and Toggle Bit (I/O
DATA Polling (I/O
polling to indicate the end of a program cycle.
When the device is in the program cycle, any
attempt to read the device will received the
complement of the loaded data on I/O
program cycle is completed, I/O
data, and the device is then ready for the next
cycle.
V29C31004T/V29C31004B Rev. 0.3 October 2000
Table 2. Command Codes
NOTES:
1.
2.
3.
4.
Command
Sequence
Read
Read
Autoselect
Mode
Byte
Program
Chip Erase
Sector Erase 5555H
The V29C31004T/V29C31004B is shipped fully
The V29C31004T/V29C31004B features a chip-
The automatic erase begins on the rising edge of
There are two methods for determining the state
The V29C31004T/V29C31004B features DATA
RA: Read Address
RD: Read Data
PA: The address of the memory location to be programmed.
PD: The data at the byte address to be programmed.
First Bus
Program Cycle
Address
XXXXH
5555H
5555H
5555H
5555H
6
).
7
)
Data
F0H
AAH
AAH
AAH
AAH
AAH
Second Bus
Program Cycle
Address
2AAAH
2AAAH
2AAAH
2AAAH
2AAAH
7
will show true
Data
55H
55H
55H
55H
55H
7
. Once the
Third Bus
Program Cycle
Address
5555H
5555H
5555H
5555H
5555H
7
)
10
Data
F0H
90H
A0H
80H
80H
Toggle Bit (I/O
another method for determining the end of a
program cycle. When the device is in the program
cycle, any attempt to read the device will result in
l/O
completed, the toggling will stop. The device is then
ready for the next operation. Examining the toggle
bit may begin at any time during a program cycle.
Boot Block Protection Enabling/Disabling
hardware Boot Block Protection. The boot block
sector protection is enabled when high voltage
(12.5V) is applied to OE and A9 pins with CE pin
LOW and WE pin LOW. The sector protection is
disabled when high voltage is applied to OE, CE
and A9 pins with WE pin LOW. Other pins can be
HIGH or LOW. This is shown in table 1.
Autoselect Mode
Autoselect mode to identify boot block locking
status, device ID and manufacturer ID.
applying a high voltage (VH) to the A9 Pin, or
through a sequence of commands (as shown in
table 2). Device will exit this mode once high
voltage on A9 is removed or another command is
loaded into the device.
The V29C31004T/V29C31004B also features
T h e V 2 9 C 3 1 0 0 4 T / V 2 9 C 3 1 0 0 4 B f e a t u r e s
The V29C31004T/V29C31004B features an
Entering Autoselect mode is accomplished by
6
Fourth Bus
Program Cycle
Address
RA(1)
See table 3 for detail.
PA
5555H
5555H
toggling between 1 and 0. Once the program is
Data
RD(2)
PD(4)
AAH
AAH
6
V29C31004T/V29C31004B
)
Fifth Bus
Program Cycle
Address
2AAAH
2AAAH
Data
55H
55H
Six Bus
Program Cycle
Address
5555H
SA(5)
Data
10H
30H