WMS7201050M WINBOND [Winbond], WMS7201050M Datasheet - Page 13

• Manufacturer Part Number: WMS7201050M
• Description: 256-TAP QUAD-CHANNEL NON-VOLATILE DIGITAL POTENTIOMETER
• Manufacturer: WINBOND [Winbond]

Note: C3-C0 are the command op-code; A3, A2 are the NVMEM address; A1, A0 are the channel address.
This chapter describes the sequences of commands to send to the WMS7204 and how to use the
different features.
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Inst
No.
7.8. B
A0
A0
A0
A0
0
1
0
1
0
1
0
0
1
1
0
1
1
C3 C2 C1 C0 A3 A2 A1 A0
ASIC
0
1
1
0
0
0
0
1
1
0
0
1
0
Instruction Byte
0
0
0
1
1
1
1
1
1
0
0
0
0
O
PERATION
0
0
0
0 A3 A2 A1 A0
0 A3 A2 A1 A0
1 A3 A2 A1 A0
1 A3 A2 A1 A0
1
1
0
1
1 A3 A2 A1 A0
1
x
x
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x
x
x
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x
x A1
x A1
x A1
x A1
x
x
x
x
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x
D15 D14 D13 D12 D11 D10 D9 D8
D8
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x
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x
TABLE 5 – INSTRUCTION SET
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Data Byte 1
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x
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x
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x
D7 D6 D5 D4 D3 D2 D1 D0
x
D7 D6 D5 D4 D3 D2 D1 D0
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x
D7 D6 D5 D4 D3 D2 D1 D0
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x
Publication Release Date: January 2003
x
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Data Byte 2
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WMS7204
No Operation
(NOP). Do nothing
Read Tap Register
and output selection
MUX register
Write to Tap
Register with D7-
D0
Read NVMEM
pointed to by A3-A0
Program NVMEM
pointed to by A3-A0
with D8-D0
Load Tap Register
and output selection
MUX register with
the contents of
NVMEM pointed to
by A3-A0
Program NVMEM
pointed to by A3-A0
with the contents of
Tap Register and
output selection
MUX register
Up: Increment
setting of TR by one
tap
Down: Decrement
setting of TR by one
tap
Sleep: Discontinue
clock supply to the
logic and memories
Wake Up: Clock
supply to the logic
and memories
Byte-erase
NVMEM pointed to
by A3-A0
Power On Reset:
Software reset the
part to the power up
state
Revision 1.0
Operation