X9268 datasheet(9/22 Pages) RENESAS

9 / 22 page

X9268

FN8172 Rev.4.00

Page 9 of 22

August 29, 2006

Table 1. Identification Byte Format

Table 2. Instruction Byte Format

Table 3. Instruction Set

Note: 1/0 = data is one or zero

Instruction

Instruction Set

Operation

RB RA

Read Wiper Counter

1001

1/0 Read the contents of the Wiper Counter

Write Wiper Counter Register

1010

1/0 Write new value to the Wiper Counter

Read Data Register

1011

1/0 1/0

1/0 Read the contents of the Data Register

pointed to by P0 and RB - RA

Write Data Register

1100

1/0 1/0

1/0 Write new value to the Data Register

pointed to by P0 and RB - RA

XFR Data Register to Wiper

Counter Register

1101

1/0 1/0

1/0 Transfer the contents of the Data Register

pointed to by P0 and RB - RA to its

associated Wiper Counter Register

XFR Wiper Counter Register

to Data Register

1110

1/0 1/0

1/0 Transfer the contents of the Wiper Counter

Global XFR Data Registers to

Wiper Counter Registers

0001

1/0 1/0

Transfer the contents of the Data Registers

pointed to by RB - RA of all four pots to their

respective Wiper Counter Registers

Global XFR Wiper Counter

Registers to Data Register

1000

1/0 1/0

Transfer the contents of both Wiper Counter

Registers to their respective data Registers

pointed to by RB - RA of all four pots

Increment/Decrement Wiper

Counter Register

0010

1/0 Enable Increment/decrement of the Control

Latch pointed to by P0

ID3

ID2

ID1

ID0

101

(MSB)

(LSB)

Device Type

Identifier

Slave Address

(MSB)

(LSB)

Instruction

Pot Selection

Opcode

Selection

(WCR Selection)

Data

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