MC68HC908AP16CFB datasheet(252/440 Pages) MOTOROLA

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Infrared Serial Communications

Data Sheet

MC68HC908AP Family — Rev. 2.5

252

MOTOROLA

14.3 Pin Name Conventions

The generic names of the IRSCI I/O pins are:

•

RxD (receive data)

•

TxD (transmit data)

IRSCI I/O (input/output) lines are implemented by sharing parallel I/O

port pins. The full name of an IRSCI input or output reflects the name of

the shared port pin. Table 14-1 shows the full names and the generic

names of the IRSCI I/O pins. The generic pin names appear in the text

of this section.

NOTE:

When the IRSCI is enabled, the SCTxD pin is an open-drain output and

requires a pullup resistor to be connected for proper SCI operation.\

14.4 IRSCI Module Overview

The IRSCI consists of a serial communications interface (SCI) and a

infrared interface sub-module as shown in Figure 14-2.

Figure 14-2. IRSCI Block Diagram

The SCI module provides serial data transmission and reception, with a

programmable baud rate clock based on the bus clock or the CGMXCLK.

Table 14-1. Pin Name Conventions

Generic Pin Names:

RxD

TxD

Full Pin Names:

PTC7/SCRxD

PTC6/SCTxD

SCTxD

INFRARED

SUB-MODULE

SCI_TxD

SCI_R32XCLK

SCI_R16XCLK

SERIAL

CGMXCLK

BUS CLOCK

INTERNAL BUS

COMMUNICATIONS

INTERFACE MODULE

(SCI)

SCRxD

SCI_RxD

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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