MBM29F040C-55 FUJITSU [Fujitsu Component Limited.], MBM29F040C-55 Datasheet - Page 11

• Manufacturer Part Number: MBM29F040C-55
• Description: 4M (512K X 8) BIT
• Manufacturer: FUJITSU [Fujitsu Component Limited.]

Notes: 1. Address bits A
Command Definitions
Read/Reset*
Read/Reset*
Autoselect
Byte Program
Chip Erase
Sector Erase
Sector Erase Suspend
Sector Erase Resume
Read/Reset
To verify programming of the protection circuitry, the programming equipment must force V
with CE and OE at V
1, 0) will produce a logical “1” code at device output DQ
00H for unprotected sector. In this mode, the lower order addresses, except for A
Address locations with A
It is also possible to determine if a sector is protected in the system by writing an Autoselect command. Performing
a read operation at the address location XX02H, where the higher order addresses (A
sector address will produce a logical “1” at DQ
*: Either of the two reset commands will reset the device.
Device operations are selected by writing specific address and data sequences into the command register.
Writing incorrect address and data values or writing them in the improper sequence will reset the device to read
mode. Table 5 defines the valid register command sequences. Note that the Erase Suspend (B0H) and Erase
Resume (30H) commands are valid only while the Sector Erase operation is in progress. Moreover, both Read/
Reset Commands are functionally equivalent, resetting the device to the read mode.
Command
Sequence
2. Bus operations are defined in Table 2.
3. RA = Address of the memory location to be read.
4. RD = Data read from location RA during read operation.
Sector Address (SA).
PA = Address of the memory location to be programmed. Addresses are latched on the falling edge of the
SA = Address of the sector to be erased. The combination of A
PD = Data to be programmed at location PA. Data is latched on the falling edge of WE.
WE pulse.
sector.
Cycles
Req'd
Write
Bus
1
4
3
4
6
6
IL
11
and WE at V
to A
Erase can be suspended during sector erase with Addr (“H” or “L”). Data (B0H)
Erase can be resumed after suspend with Addr (“H” or “L”). Data (30H)
XXXH F0H
Write Cycle
Addr Data Addr Data Addr Data Addr Data Addr Data Addr Data
555H AAH 2AAH
555H AAH 2AAH
555H AAH 2AAH
555H AAH 2AAH
555H AAH 2AAH
1
First Bus
= V
18
Table 5
= X = “H” or “L” for all address commands except for Program Address (PA) and
IL
are reserved for Autoselect manufacturer and device codes.
IH
. Scanning the sector addresses (A
Second Bus
Write Cycle
MBM29F040C Command Definitions
—
0
55H
55H
55H
55H
55H
—
for a protected sector. See Table 3 for Autoselect codes.
Write Cycle
555H
555H
555H A0H
555H
555H
Third Bus
—
0
for a protected sector. Otherwise the device will read
F0H
90H
80H
80H
—
MBM29F040C
Fourth Bus
Read/Write
555H AAH 2AAH 55H
555H AAH 2AAH 55H
RA
PA
—
—
18
Cycle
, A
16
, A
17
RD
PD
, and A
17
—
—
and A
0
, A
1
Write Cycle
and A
Fifth Bus
16
—
—
—
—
18
will uniquely select any
) while (A
16
, A
6
ID
are DON’T CARES.
17
—
—
—
—
on address pin A
and A
-55/-70/-90
6
, A
Write Cycle
555H
Sixth Bus
SA
—
—
—
—
18
1
, A
) are the
0
) = (0,
10H
30H
—
—
—
—
9
11