WMS7204 Datasheet, PDF (13/32 Pages) Winbond – 256-TAP QUAD-CHANNEL NON-VOLATILE DIGITAL POTENTIOMETER

WMS7204
Inst
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
Instruction Byte
C3 C2 C1 C0 A3 A2 A1 A0
0000xxxx
TABLE 5 – INSTRUCTION SET
Data Byte 1
Data Byte 2
D15 D14 D13 D12 D11 D10 D9 D8
D7 D6 D5 D4 D3 D2 D1 D0
xxxxxxxx
xxxxxxxx
1 1 0 0 x x A1
A0
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xxxxxxxx
0 1 0 0 x x A1
A0
xxxxxxxx
D7 D6 D5 D4 D3 D2 D1 D0
1 0 1 0 A3 A2 A1 A0 x x x x x x x x
xxxxxxxx
0 0 1 0 A3 A2 A1 A0 x x x x x x x
D8
D7 D6 D5 D4 D3 D2 D1 D0
1 0 1 1 A3 A2 A1 A0 x x x x x x x x
xxxxxxxx
0 0 1 1 A3 A2 A1 A0 x x x x x x x x
xxxxxxxx
0 1 1 1 x x A1
A0
xxxxxxxx
1 1 1 1 x x A1
A0
xxxxxxxx
1000xxxx xxxxxxxx
xxxxxxxx
xxxxxxxx
xxxxxxxx
0001xxxx xxxxxxxx
xxxxxxxx
1 1 0 1 A3 A2 A1 A0 x x x x x x x x
xxxxxxxx
1001xxxx xxxxxxxx
xxxxxxxx
Operation
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
Note: C3-C0 are the command op-code; A3, A2 are the NVMEM address; A1, A0 are the channel address.
7.8. BASIC OPERATION
This chapter describes the sequences of commands to send to the WMS7204 and how to use the
different features.
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Publication Release Date: January 2003
Revision 1.0