LA79200V

No.A0258-6/8

BUS Control Register Bit Allocation

IC Address (WRITE) : 011111A0

BUS Control Register Bit Allocation Map

2002.12.27

Control Register Bit Allocations

Sub Address

MSB

DATA BITS

LSB

DA0

DA1

DA2

DA3

DA4

DA5

DA6

DA7

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

0000 0000

PEX7

PEX6

PEX5

PEX4

PEX3

PEX2

PEX1

PEX0

0

0

0

0

0

0

0

0

0000 0001

DA Output 0

∗

DA Output 0

∗

0

0

∗

0

0

∗

(Bits are transmitted in this order.)

BUS Control Register Bit Allocation Map

IC Address (READ) : 011111A1

Status Register Bit Allocations

MSB

DATA BITS

LSB

DA0

DA1

DA2

DA3

DA4

DA5

DA6

DA7

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

Status 1

PEX7

PEX6

PEX5

PEX4

PEX3

PEX2

PEX1

PEX0

∗

∗

∗

∗

∗

∗

∗

∗

Status 2

(PEX7)

(PEX6)

(PEX5)

(PEX4)

(PEX3)

(PEX2)

(PEX1)

(PEX0)

∗

∗

∗

∗

∗

∗

∗

∗

Note

(1) “A” in the IC address is set by PIN14, Address.

(2) For the Read Status, the first 1 byte of two bytes that have been read is used.

(Attempt to read only the first 1 byte may cause failure of occurrence of the STOP condition.).

Bus Control Register Truth Table

Control Register Truth Table

Register Name

0 HEX

1 HEX

2 HEX

3 HEX

PEX 0

Low

High

PEX 1

Low

High

PEX 2

Low

High

PEX 3

Low

High

PEX 4

Low

High

PEX 5

Low

High

PEX 6

Low

High

PEX 7

Low

High

DA OUTPUT_1

High

Mid 2

Mid 1

Low

DA OUTPUT_2

High

Mid 2

Mid 1

Low

Bus Control Register Truth Table

Status Byte Truth Table

Register Name

0 HEX

1 HEX

2 HEX

3 HEX

PEX 0

Low

High

PEX 1

Low

High

PEX 2

Low

High

PEX 3

Low

High

PEX 4

Low

High

PEX 5

Low

High

PEX 6

Low

High

PEX 7

Low

High