MBM29F400TC
-55/-70-90
/MBM29F400BC
-55/-70-90
MBM29F400TC/BC Command Definitions
Command
Sequence
Word
Byte
Word
Byte
Word
Byte
Word
Byte
Word
Byte
Word
Byte
Bus
Write
Cycles
Req'd
Second
First Bus
Third Bus Fourth Bus Fifth Bus
Sixth Bus
Bus
Read/Write Write Cycle Write Cycle
Write Cycle Write Cycle Write Cycle
Cycle
Addr Data Addr Data Addr Data Addr Data Addr Data Addr Data
XXXh F0h
555h
AAAh
555h
AAAh
555h
AAAh
555h
AAAh
555h
AAAh
AAh
AAh
AAh
AAh
AAh
—
2AAh
555h
2AAh
555h
2AAh
555h
2AAh
555h
2AAh
555h
—
55h
55h
55h
55h
55h
—
555h
AAAh
555h
AAAh
555h
AAAh
555h
AAAh
555h
AAAh
—
F0h
90h
A0h
80h
80h
—
RA
—
PA
555h
AAAh
555h
AAAh
—
RD
—
PD
AAh
AAh
—
—
—
—
2AAh
555h
2AAh
555h
—
—
—
—
55h
55h
—
—
—
—
555h
AAAh
SA
—
—
—
—
10h
30h
Read/Reset
Read/Reset
Autoselect
Program
Chip Erase
Sector
Erase
1
3
3
4
6
6
Sector Erase Suspend
Sector Erase Resume
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)
Notes:
•
Address bits A
15
to A
11
= X = “H” or “L” for all address commands except or Program Address (PA) and
Sector Address (SA).
•
Bus operations are defined in “MBM29F400TC/BC User Bus Operation (BYTE = V
IH
)” and
“MBM29F400TC/BC User Bus Operation (BYTE = V
IL
)” in
sDEVICE
BUS OPERATION.
•
RA = Address of the memory location to be read.
PA = Address of the memory location to be programmed. Addresses are latched on the falling edge of
the WE pulse.
SA = Address of the sector to be erased. The combination of A
17
, A
16
, A
15
, A
14
, A
13
, and A
12
will
uniquely select any sector.
•
RD = Data read from location RA during read operation.
PD = Data to be programmed at location PA. Data is latched on the rising edge of WE.
•
The system should generate the following address patterns:
Word Mode: 555h or 2AAh to addresses A
10
to A
0
Byte Mode: AAAh or 555h to addresses A
10
to A
-1
•
Both Read/Reset commands are functionally equivalent, resetting the device to the read mode.
•
Command combinations not described in Command Definitions table are illegal.
8
SPANSION [ SPANSION ]
