CIRCC datasheet(5/70 Pages) SMSC

5 / 70 page

INTERFACE DESCRIPTION

The Interface Description lists the signals that

are required to place the CIrCC in a larger chip-

level context.

There are four groups of signals in this section:

PORT signals, HOST BUS controls, SYSTEM

controls, and CHIP-LEVEL CONFIGURATION

controls.

Ports

The three Ports (IR, COM, and AUX) provide

external access for serial data and controls. The

active CIrCC encoder is routed through the

Output Multiplexer to the IR, COM, or AUX port.

Table 1 - IR Port Signals

NAME

SIZE (BITS)

TYPE

DESCRIPTION

IRRx

Input

Infrared Receive Data

IRTx

Output

Infrared Transmit Data

Table 2 - COM Port Signals

NAME

SIZE (BITS)

TYPE

DESCRIPTION

CRx

Input

COM Receive Data

CTx

Output

COM Transmit Data

nRTS

Output

Request to Send

nDTR

Output

Data Terminal Ready

nCTS

Input

Clear To Send

nDSR

Input

Data Set Ready

nDCD

Input

Data Carrier Detect

nRI

Input

Ring Indicator

Table 3 - AUX Port Signals

(e.g., can be used for high-current drivers for Consumer IR)

NAME

SIZE (BITS)

TYPE

DESCRIPTION

ARx

Input

Aux. Receive Data

ATx

Output

Aux. Transmit Data

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