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AT45DB161B-CI

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33
16
AT45DB161B
2224G–DFLSH–5/03
Write Operations The following block diagram and waveforms illustrate the various write sequences
available.
Main Memory Page Program through Buffers
Buffer Write
Buffer to Main Memory Page Program (Data from Buffer Programmed into Flash Page)
FLASH MEMORY ARRAY
PAGE (528 BYTES)
BUFFER 2 (528 BYTES)BUFFER 1 (528 BYTES)
I/O INTERFACE
SI
BUFFER 1 TO
MAIN MEMORY
PAGE PROGRAM
MAIN MEMORY
PAGE PROGRAM
THROUGH BUFFER 2
BUFFER 2 TO
MAIN MEMORY
PAGE PROGRAM
MAIN MEMORY PAGE
PROGRAM THROUGH
BUFFER 1
BUFFER 1
WRITE
BUFFER 2
WRITE
SI
CMD n n+1 Last Byte
· Completes writing into selected buffer
· Starts self-timed erase/program operation
CS
r r , PA11-6
PA5-0, BFA9-8
BFA7-0
SI
CMD X
X···X, BFA9-8
BFA7-0
n
n+1
Last Byte
· Completes writing into selected buffer
CS
SI
CMD PA5-0, XX X
CS
Starts self-timed erase/program operation
r r , PA11-6
Each transition represents
8 bits and 8 clock c
y
cles
n = 1st byte read
n+1 = 2nd byte read
17
AT45DB161B
2224G–DFLSH–5/03
Read Operations The following block diagram and waveforms illustrate the various read sequences
available.
Main Memory Page Read
Main Memory Page to Buffer Transfer (Data from Flash Page Read into Buffer)
Buffer Read
FLASH MEMORY ARRAY
PAGE (528 BYTES)
BUFFER 2 (528 BYTES)BUFFER 1 (528 BYTES)
I/O INTERFACE
MAIN MEMORY
PAGE TO
BUFFER 1
MAIN MEMORY
PAGE TO
BUFFER 2
MAIN MEMORY
PAGE READ
BUFFER 1
READ
BUFFER 2
READ
SO
SI
CMD
PA5-0, BA9-8
BA7-0 X
XXX
CS
n n+1
SO
r r , PA11-6
SI
CMD
PA5-0, XX X
Starts reading page data into buffer
CS
SO
r r , PA11-6
SI
CMD
X
X···X, BFA9-8
BFA7-0
CS
n n+1
SO
X
Each transition represents
8 bits and 8 clock c
y
cles
n = 1st byte read
n+1 = 2nd byte read
18
AT45DB161B
2224G–DFLSH–5/03
Detailed Bit-level Read Timing – Inactive Clock Polarity Low
Continuous Array Read (Opcode: 68H)
Main Memory Page Read (Opcode: 52H)
SI
0
1XX
CS
SO
SCK
12 63 64 65 66 67 68
HIGH-IMPEDANCE
D
7
D
6
D
5
D
2
D
1
D
0
D
7
D
6
D
5
DATA OUT
BIT 0
OF
PAGE n+1
BIT 4223
OF
PAGE n
LSB MSB
t
SU
t
V
SI
0
1
0
10
XXX
CS
SO
SCK
12345 60 61 62 63 64 65 66 67
XX
HIGH-IMPEDANCE
D
7
D
6
D
5
DATA OUT
COMMAND OPCODE
MSB
t
SU
t
V
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33

AT45DB161B-CI

Mfr. #:
Buy AT45DB161B-CI
Manufacturer:
Microchip Technology / Atmel
Description:
NOR Flash 16M bit
Lifecycle:
New from this manufacturer.
Delivery:
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