WMS7204

Publication Release Date: January 2003

- 13 -

Revision 1.0

TABLE 5 – INSTRUCTION SET

Inst

No.

Instruction Byte

C3 C2 C1 C0 A3 A2 A1 A0

Data Byte 1

D15 D14 D13 D12 D11 D10 D9 D8

Data Byte 2

D7 D6 D5 D4 D3 D2 D1 D0

Operation

1

0

0

0

0

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

No Operation

(NOP). Do nothing

2

1

1

0

0

x

x A1

A0

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Read Tap Register

and output selection

MUX register

3

0

1

0

0

x

x A1

A0

x

x

x

x

x

x

x

x

D7 D6 D5 D4 D3 D2 D1 D0

Write to Tap

Register with D7-

D0

4

1

0

1

0 A3 A2 A1 A0

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Read NVMEM

pointed to by A3-A0

5

0

0

1

0 A3 A2 A1 A0

x

x

x

x

x

x

x

D8

D7 D6 D5 D4 D3 D2 D1 D0

Program NVMEM

pointed to by A3-A0

with D8-D0

6

1

0

1

1 A3 A2 A1 A0

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Load Tap Register

and output selection

MUX register with

the contents of

NVMEM pointed to

by A3-A0

7

0

0

1

1 A3 A2 A1 A0

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Program NVMEM

pointed to by A3-A0

with the contents of

Tap Register and

output selection

MUX register

8

0

1

1

1

x

x A1

A0

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Up: Increment

setting of TR by one

tap

9

1

1

1

1

x

x A1

A0

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Down: Decrement

setting of TR by one

tap

10

1

0

0

0

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Sleep: Discontinue

clock supply to the

logic and memories

11

0

0

0

1

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Wake Up: Clock

supply to the logic

and memories

12

1

1

0

1 A3 A2 A1 A0

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Byte-erase

NVMEM pointed to

by A3-A0

13

1

0

0

1

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

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.

This chapter describes the sequences of commands to send to the WMS7204 and how to use the

different features.