MSM9405MB データシートの表示（PDF） - Oki Electric Industry

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MSM9405MB

IrDA Communication Controller

Oki Electric Industry 

¡ Semiconductor

MSM9405

PIN DESCRIPTIONS

Function

Transceiver

Module Interface

Microcontroller

Interface

DMA Controller

Interface

Others

Pin

27

26

25

24

9-2

13-10

14

15

17

18

22

21

23

20

19

28

30

29

1

16

Symbol

IRIN-A

IRIN-B

IROUT

SD

D0-D7

A0-A3

CS

RD

WR

INTR

DREQ

DACK

TC

PWDN

RESET

TEST

XIN

XOUT

VDD

GND

Type

Description

I Receive signal input A. (2.4 kbps to 4 Mbps)*1

I Receive signal input B. (0.576 to 4 Mbps)

When connecting this device to a transceiver module,

tie this pin high or low if the number of the receive signal

output pins that the module has is only one.*1

O Transmit signal output. Active high.

O Transceiver module control signal output.

Becomes active when PWDN is set low.*1

This pin must be left open if connecting this device to a

transceiver module having no shutdown pins.

I/O Data input-output.

I Register address inputs.

I Chip select input. Active low.

When low, read and write signals are enabled.

I Read signal input. Active low.

I Write signal input. Active low.

O Interrupt request signal output. Active low.

O DMA Request signal output. *1

I DMA acknowledge signal input. *1

I DMA transfer end signal input. Active low.

I Power down control. Active low.

When set low, oscillation stops and the device enters power

down (low supply current) mode.

I System reset input. Active low.

When set low, the internal registers are initialized.

O Test. Must be left open.

I Crystal connect.

O Crystal connect.

— Power supply.

— Ground.

*1 Either active high or active low can be selected depending on the register setting.

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