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AT45DB011B-XI
P1-P3
P4-P6
P7-P9
P10-P12
P13-P15
P16-P18
P19-P21
P22-P24
P25-P27
P28-P30
P31-P32
16
AT45DB011B
1984J–DFLASH–06/0
6
Write
Operations
The following block diagram and
waveforms illustra
te the various write
sequences available.
Main Memor
y P
age
Program thr
oug
h Buffer
Buffer Write
Buffer to Main Memory P
age Program
(Dat
a from Buffer Pr
ogra
mmed into Flash Pa
g
e)
FLASH MEMORY ARRAY
PAGE (264 BYTES)
BUFFER (264 BYTES)
I/O INTERFACE
SI
BUFFER TO
MAIN MEMORY
PAGE PROGRAM
MAIN MEMORY PAGE
PROGRAM THROUGH
BUFFER
BUFFER
WRITE
SI
CMD
n
n+1
Last Byte
· Completes writing into buffer
· Starts self-timed erase/program operation
CS
r
···r
, PA8-7
PA6-0, BFA8
BFA7-0
SI
CMD
X
X···X, BFA8
BFA7-0
n
n+1
Last Byte
· Completes writing into buffer
CS
SI
CMD
PA6-0, X
X
CS
Starts self-timed erase/program operation
r
···r
, PA8-7
Each transition represents
8 bits and 8 clock c
y
cles
n = 1st byte written
n+1 = 2nd byte written
17
AT45DB011B
1984J–DFLASH–06/06
Read
Operations
The following block diagram and
waveforms illustra
te the various read
sequences available.
Main Memor
y P
age
Read
Main Memory Pa
g
e to Buff
er T
ransfer (Data fr
om Fl
ash Pa
g
e Read into Buffer)
Buffer Read
FLASH MEMORY ARRAY
PAGE (264 BYTES)
BUFFER (264 BYTES)
I/O INTERFACE
MAIN MEMORY
PAGE TO
BUFFER
MAIN MEMORY
PAGE READ
BUFFER
READ
SO
SI
CMD
PA6-0, BA8
BA7-0
X
XXX
CS
n
n+1
SO
r
···r
, PA8-7
SI
CMD
PA6-0, X
X
Starts reading page data into buffer
CS
SO
r
···r
, PA8-7
SI
CMD
X
X···X, BFA8
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
AT45DB011B
1984J–DFLASH–06/0
6
Detailed Bit-level Read Timing – Inacti
ve Cloc
k P
olarity Low
Continuous Arra
y Read (Opcode: 68H)
Main Memory P
age
Read (Opcode: 52H)
SI
0
1X
X
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 2111
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-P3
P4-P6
P7-P9
P10-P12
P13-P15
P16-P18
P19-P21
P22-P24
P25-P27
P28-P30
P31-P32
AT45DB011B-XI
Mfr. #:
Buy AT45DB011B-XI
Manufacturer:
Microchip Technology / Atmel
Description:
NOR Flash DATAFLASH 1M SERIAL 2.7V TSSOP IND TEMP
Lifecycle:
New from this manufacturer.
Delivery:
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AT45DB011B-XC