CAM35C44 datasheet(11/50 Pages) SMSC

11 / 50 page

NAME

TOTAL

PINS

SYMBOL

BUFFER

TYPE

DESCRIPTION

SERIAL PORT INTERFACE (2)

Receive Serial Data 2/

Infrared Rx

RXD/IRRX

This is the receiver input pin for

the UART COM port or an

alternate infrared port receiver

input.

Transmit Serial Data

2/Infrared Tx

1,2

TXD/IRTX

O12PD

This is the transmitter output pin

for the UART COM port or an

alternate infrared port transmitter

output.

Note

TX and MODE pins drive to VIO level.

Note

TX defaults to zero even during POR.

Note

RX pins are voltage tolerant to VIO level.

Note

All GPIOs are VIO tolerant and back drive protected.

Buffer-Type Summary

The characteristics of the buffer types shown in TABLE 1 are summarized in TABLE 2.

TABLE 2 - CAM35C44 BUFFER-TYPE SUMMARY

BUFFER TYPE

DESCRIPTION

IO12

Input/Output. 12mA sink; 6mA source

O12

Output. 12mA sink; 6mA source

OD12

Open Drain. 12mA sink

O12PD

Output. 12mA sink; 6mA source; 30

#A Pulldown @ Tristate

ICLK

Input to Crystal Oscillator Circuit (TTL levels)

OCLK

Output to External Crystal

Input TTL Compatible.

Input TTL Compatible with 30

#A Pullup

Input with Schmitt Trigger.

CAM35C44 Datasheet(PDF) 11 Page - SMSC Corporation

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