MB88141A

11

(4) Channel Selection (8 bits)

( ): When using D/A converter 8 channel, I/O expander 4 bit operation.

× : Don’t Care

(5) D/A Data (8 bits)

Same as “1 (5) D/A Data (8 bits)”.

(6) I/O Expander Continuous Operation

→ parallel data output

C7

C6

C5

C4

C3

C2

C1

C0

Channel select

×

×

×

×

0

0

0

0

I/O expander operation

×

×

×

×

0

0

0

1

AO1 selected

×

×

×

×

0

1

0

0

AO4 selected

×

×

×

×

0

1

0

1

Don’t care (AO5 selected)

×

×

×

×

1

0

0

0

Don’t care (AO8 selected)

×

×

×

×

1001

Don’t Care

×

×

×

×

1110

Don’t Care

×

×

×

×

1

1

1

1

I/O expander continuous operation

Note: In continuous operation, operation continues until start and stop conditions are acknowledged.

Parallel data input

S

Slave

address

0A

X X X X1 1 1 1

A

Digital data

A

Digital data

A

P

S

Slave

address

1

A

Digital data

A

Digital data

A

Digital data

A

P

: Sent from master device

: Sent from MB88141A (slave device)

S

: “Start” condition

P

: “Stop” condition

A

: “Acknowledge” output