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FM25V40-DCG Fiches technique(PDF) 10 Page - Cypress Semiconductor

No de pièce FM25V40-DCG
Description  4-Mbit (512 K 횞 8) Serial (SPI) F-RAM
Download  23 Pages
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Fabricant  CYPRESS [Cypress Semiconductor]
Site Internet  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

FM25V40-DCG Fiches technique(HTML) 10 Page - Cypress Semiconductor

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PRELIMINARY
FM25V40
Document Number: 001-87288 Rev. *A
Page 10 of 23
HOLD Pin Operation
The HOLD pin can be used to interrupt a serial operation without
aborting it. If the bus master pulls the HOLD pin LOW while SCK
is LOW, the current operation will pause. Taking the HOLD pin
HIGH while SCK is LOW will resume an operation. The
transitions of HOLD must occur while SCK is LOW, but the SCK
and CS pin can toggle during a hold state.
Figure 13. Fast Read Operation
CS
SCK
SO
0123
4
5
6
7
0
7
6
5
4
3
2
1
20212223 24 25 26 27 28 29 30 31
Data
SI
Opcode
0
0
0
0
101
XX
X
X
A17
1
A18
A16
A3
A1
A2
A0
19-bit Address
MSB
LSB
MSB
LSB
D0
D1
D2
D3
D4
D5
D6
D7
0123
45
67
X
X
X
X
X
X
X
X
Dummy Byte
HI-Z
X
Figure 14. HOLD Operation[2]
CS
SCK
HOLD
SO
SI
VALID IN
VALID IN
Note
2. Figure shows HOLD operation for input mode and output mode.


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