Datasheet

Infrared Serial Communications Interface Module (IRSCI)
MC68HC908LJ12 — Rev. 2.1 Technical Data
Freescale Semiconductor Infrared Serial Communications Interface Module (IRSCI) 231
13.4 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 13-1 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.
13.5 IRSCI Module Overview
The IRSCI consists of a serial communications interface (SCI) and a
infrared interface sub-module as shown in Figure 13-2.
Figure 13-2. 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 13-1. Pin Name Conventions
Generic Pin Names: RxD TxD
Full Pin Names:
PTB1/RxD
PTB0/TxD
TxD
INFRARED
SUB-MODULE
SCI_TxD
SCI_R32XCLK
SCI_R16XCLK
SERIAL
CGMXCLK
BUS CLOCK
INTERNAL BUS
COMMUNICATIONS
INTERFACE MODULE
(SCI)
RxD
SCI_RxD