9

FN8194.3

October 12, 2006

Wiper Counter Register, (6-Bit), Volatile

One 6-bit wiper counter register for each XDCP. (Four

6-bit registers in total.)

– {D5~D0}: These bits specify the wiper position of the

respective XDCP. The Wiper Counter Register is

loaded on power-up by the value in Data Register 0.

The contents of the WCR can be loaded from any of

the other Data Register or directly. The contents of

the WCR can be saved in a DR.

Instruction Format

Notes: (1) “MACK”/”SACK”: stands for the acknowledge sent by the master/slave.

(2) “A3 ~ A0”: stands for the device addresses sent by the master.

(3) “X”: indicates that it is a “0” for testing purpose but physically it is a “don’t care” condition.

(4) “I”: stands for the increment operation, SDA held high during active SCL phase (high).

(5) “D”: stands for the decrement operation, SDA held low during active SCL phase (high).

Read Wiper Counter Register (WCR)

Write Wiper Counter Register (WCR)

Read Data Register (DR)

Write Data Register (DR)

XFR Data Register (DR) to Wiper Counter Register (WCR)

WP5

WP4

WP3

WP2

WP1

WP0

VVVVVV

(MSB)

(LSB)

S

T

A

R

T

device type

identifier

device

addresses

S

A

C

K

instruction

opcode

WCR

addresses

S

A

C

K

wiper position

(sent by slave on SDA)

M

A

C

K

S

T

O

P

01 01 A

3

A

2

A

1

A

0

100 100 0 P

0

00

W

P

5

W

P

4

W

P

3

W

P

2

W

P

1

W

P

0

S

T

A

R

T

device type

identifier

device

addresses

S

A

C

K

instruction

opcode

WCR

addresses

S

A

C

K

wiper position

(sent by master on SDA)

S

A

C

K

S

T

O

P

01 01 A

3

A

2

A

1

A

0

101 000 0 P

0

00

W

P

5

W

P

4

W

P

3

W

P

2

W

P

1

W

P

0

S

T

A

R

T

device type

identifier

device

addresses

S

A

C

K

instruction

opcode

DR and WCR

addresses

S

A

C

K

wiper position/data

(sent by slave on SDA)

M

A

C

K

S

T

O

P

0101 A

3

A

2

A

1

A

0

1011 R

1

R

0

0

P

0

00

W

P

5

W

P

4

W

P

3

W

P

2

W

P

1

W

P

0

S

T

A

R

T

device type

identifier

device

addresses

S

A

C

K

instruction

opcode

DR and WCR

addresses

S

A

C

K

wiper position/data

(sent by master on SDA)

S

A

C

K

S

T

O

P

HIGH-VOLTAGE

WRITE CYCLE

0101 A

3

A

2

A

1

A

0

1 100 R

1

R

0

0P0

0 0

W

P

5

W

P

4

W

P

3

W

P

2

W

P

1

W

P

0

S

T

A

R

T

device type

identifier

device

addresses

S

A

C

K

instruction

opcode

DR and WCR

addresses

S

A

C

K

S

T

O

P

010 1 A

3

A

2

A

1

A

0

1101 R

1

R

0

0 P

0

X9418