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CAT25C08PI-1.8TE13 Datasheet(Hoja de datos) 7 Page - Catalyst Semiconductor

No. de Pieza. CAT25C08PI-1.8TE13
Descripción  1K/2K/4K/8K/16K SPI Serial CMOS E2PROM
Descarga  10 Pages
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Fabricante  CATALYST [Catalyst Semiconductor]
Página de inicio  http://www.catalyst-semiconductor.com
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7
CAT25C01/02/04/08/16
Doc. No. 25067-00 5/00
Advanced Information
Figure 4. Read Instruction Timing
Byte Write
Once the device is in a Write Enable state, the user may
proceed with a write sequence by setting the
CS low,
issuing a write instruction via the SI line, followed by the
16-bit address for 25C08/16. (only 10-bit addresses are
used for 25C08, 11-bit addresses are used for 25C16.
The rest of the bits are don't care bits) and 8-bit address
for 25C01/02/04 (for the 25C04, bit 3 of the read data
instruction contains address A8). Programming will start
after the
CS is brought high. Figure 6 illustrates byte
write sequence.
WRITE Sequence
The CAT25C01/02/04/08/16 powers up in a Write Dis-
able state. Prior to any write instructions, the WREN
instruction must be sent to CAT25C01/02/04/08/16.
The device goes into Write enable state by pulling the
CS low and then clocking the WREN instruction into
CAT25C01/02/04/08/16. The
CS must be brought high
after the WREN instruction to enable writes to the
device. If the write operation is initiated immediately
after the WREN instruction without
CS being brought
high, the data will not be written to the array because the
write enable latch will not have been properly set. Also,
for a successful write operation the address of the
memory location(s) to be programmed must be outside
the protected address field location selected by the
block protection level.
Figure 5. RDSR Instruction Timing
Note: Dashed Line= mode (1, 1) – ––––
Note: Dashed Line= mode (1, 1) – – – –
SK
SI
SO
0000001
1
BYTE ADDRESS*
0123456789
10
20
21
22
23
24
25
26
27
28
29
30
7
6
5
4
3
2
1
0
*Please check the instruction set table for address
CS
OPCODE
DATA OUT
MSB
HIGH IMPEDANCE
0
1
2
345
67
8
10
911
12
13
14
SCK
SI
DATA OUT
MSB
HIGH IMPEDANCE
OPCODE
SO
7
6
5
4
3
2
1
0
CS
00
0
00
1
0
1




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