MX29L3211 Macronix International, MX29L3211 Datasheet - Page 6

• Manufacturer Part Number: MX29L3211
• Description: CMOS SINGLE VOLTAGE PAGEMODE FLASH EEPROM
• Manufacturer: Macronix International

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WRITE OPERATIONS
Commands are written to the COMMAND INTERFACE
REGISTER (CIR) using standard microprocessor write
timings. The CIR serves as the interface between the
microprocessor and the internal chip operation. The
CIR can decipher Read Array, Read Silicon ID, Erase
and Program command. In the event of a read command,
the CIR simply points the read path at either the array or
the silicon ID, depending on the specific read command
given. For a program or erase cycle, the CIR informs the
write state machine that a program or erase has been
requested. During a program cycle, the write state
machine will control the program sequences and the
TABLE 3. COMMAND DEFINITIONS
P/N:PM0641
Command
Sequence
Bus Write
Cycles Req'd
First Bus
Write Cycle
Second Bus
Write Cycle
Third Bus
Write Cycle
Fourth Bus
Read/Write Cycle
Fifth Bus
Write Cycle
Sixth Bus
Write Cycle
Addr
Data
Addr
Data
Addr
Data
Addr
Data
Addr
Data
Addr
Data
Read/
Reset
4
5555H
AAH
55H
5555H
F0H
RA
RD
2AAAH
Silicon
ID Read
4
5555H
AAH
2AAAH
55H
5555H
90H
00H/01H
C2H/F9H
Page/Byte Chip
Program
4
5555H
AAH
2AAAH
55H
5555H
A0H
PA
PD
Erase
6
5555H
AAH
55H
5555H
80H
5555H
AAH
55H
5555H
10H
2AAAH
2AAAH
6
CIR will only respond to status reads. During a sector/
chip erase cycle, the CIR will respond to status reads
and erase suspend. After the write state machine has
completed its task, it will allow the CIR to respond to its
full command set. The CIR stays at read status register
mode until the microprocessor issues another valid
command sequence.
Device operations are selected by writing commands
into the CIR. Table 3 below defines 32 Mbit flash family
command.
Erase
5555H
55H
Sector
6
AAH
2AAAH
5555H
80H
5555H
AAH
2AAAH
55H
SA
30H
Erase
Suspend
3
5555H
AAH
2AAAH
55H
5555H
B0H
MX29L3211
Resume
Erase
3
5555H
AAH
2AAAH
55H
5555H
D0H
Read
Status Reg.
4
5555H
AAH
2AAAH
55H
5555H
70H
X
SRD
REV. 0.3, NOV. 06, 2001
Clear
Status Reg.
3
5555H
2AAAH
55H
50H
AAH
5555H