GENERAL DESCRIPTION

The MSM9405 is a communication controller conforming to IrDA, the international standard for infrared data communication. The device covers the IrDA physical specifications Ver.1.0 and 1.1.

Since the device performs some of the functions concerning communication protocol control, the load on the software (firmware) for protocol control can be reduced. By combining the device with another microcontroller and an infrared transceiver module, a device provided with IrDA-compliant communication function can be configured.

FEATURES

? Data transfer rates

IrDA 1.0 : 2400, 9600 bps; 19.2, 38.4, 57.6, 115.2 kbps

IrDA 1.1 : 0.576, 1.152, 4 Mbps

? Detection/removal for beginning of frame and end of frame (IrDA 1.0, 1.1)

Insertion for beginning of frame and end of frame (IrDA 1.0, 1.1)

? Generation/check for CRC (IrDA 1.0, 1.1)

? Host interface

8-bit data bus : D0-D7

DMA transfer : DREQ, DACK, TC

Interrupt : INTR

Address : A0-A3

Control signal : CS, RD, WR

? Infrared module control signal : SD

? Built-in 32-byte transmit-receive FIFOs

? Power down mode

? Built-in oscillator circuit

? Crystal oscillation frequency : 18.432 MHz (other than 4 Mbps data rate)

: 48 MHz (when 4 Mbps data rate used)

? Operating voltage (VDD) : 2.7 to 3.6 V

? Package:

30-pin plastic SSOP (SSOP30-P-56-0.65-K) (Product name : MSM9405MB)