MBM29PL65LM Fujitsu Media Devices, MBM29PL65LM Datasheet - Page 22

• Manufacturer Part Number: MBM29PL65LM
• Description: FLASH MEMORY CMOS 64 M (4M X 16) BIT MirrorFlashTM
• Manufacturer: Fujitsu Media Devices

22
MBM29PL65LM
Fast Programming
Extended Sector Group Protection
Query Command (CFI : Common Flash Memory Interface)
HiddenROM Mode
HiddenROM Region
During Fast Mode, the programming can be executed with two bus cycles operation. The Embedded Program
Algorithm is executed by writing program set-up command (A0h) and data write cycles (PA/PD). Refer to "Em-
bedded Program Algorithm for Fast Mode".
In addition to normal sector group protection, the device has Extended Sector Group Protection as extended
function. This function enables protection of the sector group by forcing V
sequence. Unlike conventional procedures, it is not necessary to force V
The only RESET pin requires V
requires V
into the command register. Then the sector group addresses pins (A
A
recommended), and write extended sector group protection command (60h). A sector group is typically protected
in 250 s.
To verify programming of the protection circuitry, the sector group addresses pins (A
A
command write, a logical “1” at device output DQ
output data is logical “0”, write the extended sector group protection command (60h) again. To terminate the
operation, set RESET pin to V
ING WAVEFORMS and “Extended Sector Group Protection Algorithm” in
To verify programming of the protection circuitry, the sector group addresses pins (A
A
command write, a logical “1” at device output DQ
output data is logical “0”, write the extended sector group protection command (60h) again. To terminate the
operation, set RESET pin to V
ING WAVEFORMS and “Extended Sector Group Protection Algorithm” in
The operation is initiated by writing the query command (98h) into the command register. Following the command
write, a read cycle from specific address retrives device information. Refer to "Common Flash Memory Interface
Code" in
in word mode (16 bit) read. To terminate operation, write the Read/Reset command sequence into the register.
The HiddenROM (HiddenROM) feature provides a Flash memory region that the system may access through
a new command sequence. This is primarily intended for customers who wish to use an Electronic Serial Number
(ESN) in the device with the ESN protected against modification. Once the HiddenROM region is protected, any
further modification of that region is impossible. This ensures the security of the ESN once the product is shipped
to the field. This device occupies the address of the 000000h to 00007Fh.
After the system writes the HiddenROM Entry command sequence, it may read the HiddenROM region by using
device addresses A
normally be sent to the address to the HiddenROM region. This mode of operation continues until the system
issues the Exit HiddenROM command sequence, or until power is removed from the device. On power-up, or
following a hardware reset, the device reverts to sending commands to the address.
If you request Fujitsu to program the ESN in the device, please contact a Fujitsu representative for more infor-
mation.
0
13
13
) = (0, 0, 0, 1, 0) should be set to the sector group to be protected (set V
and A
and A
12
12
ID
) and (A
) and (A
DEVICE BUS OPERATION in detail. Please note that output data of upper byte (DQ
on RESET pin. With this condition, the operation is initiated by writing the set-up command (60h)
6
6
6
, A
, A
to A
3
3
, A
, A
0
2
2
(A
, A
, A
IH
IH
20
. (Refer to the “Extended Sector Group Protection Timing Diagram” in
. (Refer to the “Extended Sector Group Protection Timing Diagram” in
1
1
ID
-90/10
, A
, A
to A
for sector group protection in this mode. The extended sector group protection
0
0
) = (0, 0, 0, 1, 0) should be set and write a command (40h). Following the
) = (0, 0, 0, 1, 0) should be set and write a command (40h). Following the
7
are all “0”). That is, the device sends only program command that would
0
0
will produce for protected sector in the read operation. If the
will produce for protected sector in the read operation. If the
21
, A
ID
20
on RESET pin and writes a command
ID
, A
and control timing for control pins.
19
FLOW CHART.)
FLOW CHART.)
IL
, A
for the other addresses pins is
18
, and A
20
20
, A
, A
19
19
17
, A
, A
) and (A
18
18
, A
, A
15
17,
17,
to DQ
6
A
A
, A
16,
16,
SWITCH-
SWITCH-
3
, A
A
A
8
) is “0”
15,
15,
2
, A
A
A
14,
14,
1
,