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CAT25C256U14A-1.8TE13 датащи(PDF) 9 Page - Catalyst Semiconductor

номер детали CAT25C256U14A-1.8TE13
подробное описание детали  128K/256K-Bit SPI Serial CMOS E2PROM
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производитель  CATALYST [Catalyst Semiconductor]
домашняя страница  http://www.catalyst-semiconductor.com
Logo CATALYST - Catalyst Semiconductor

CAT25C256U14A-1.8TE13 датащи(HTML) 9 Page - Catalyst Semiconductor

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CAT25C128/256
Doc. No. 25088-00 1/01
Figure 7. WRSR Timing
address will remain constant.The only restriction is that
the 64 bytes must reside on the same page. If the
address counter reaches the end of the page and clock
continues, the counter will “roll over” to the first address
of the page and overwrite any data that may have been
written. The CAT25C128/256 is automatically returned
to the write disable state at the completion of the write
cycle. Figure 8 illustrates the page write sequence.
To write to the status register, the WRSR instruction
should be sent. Only Bit 2, Bit 3 and Bit 7 of the status
register can be written using the WRSR instruction.
Figure 7 illustrates the sequence of writing to status
register.
During an internal write cycle, all commands will be
ignored except the RDSR (Read Status Register) in-
struction.
The Status Register can be read to determine if the write
cycle is still in progress. If Bit 0 of the Status Register is
set at 1, write cycle is in progress. If Bit 0 is set at 0, the
device is ready for the next instruction
Page Write
The CAT25C128/256 features page write capability.
After the initial byte the host may continue to write up to
64 bytes of data to the CAT25C128/256. After each byte
of data is received, six lower order address bits are
internally incremented by one; the high order bits of
Figure 6. Write Instruction Timing
Figure 8. Page Write Instruction Timing
SK
SI
SO
0
0
0
0
0
0
1
0
ADDRESS
D7
D6
D5
D4
D3
D2
D1
D0
012345678
21
22
23
24
25
26
27
28
29
30
31
CS
OPCODE
DATA IN
HIGH IMPEDANCE
0
1
2
345
67
8
10
911
12
13
14
SCK
SI
MSB
HIGH IMPEDANCE
DATA IN
15
SO
CS
7
6
5
4
3
2
10
00
0
00
0
0
1
OPCODE
SK
SI
SO
0
0
0
0
0
0
1
0
ADDRESS
Data
Byte 1
012345678
21
22
23 24-31
32-39
Data
Byte 2
Data
Byte 3
Data Byte N
CS
OPCODE
7..1
0
24+(N-1)x8-1..24+(N-1)x8 24+Nx8-1
DATA IN
HIGH IMPEDANCE
Note: Dashed Line= mode (1, 1) — — — —
Note: Dashed Line= mode (1, 1) — — — —
Note: Dashed Line= mode (1, 1) — — — —


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