Datasheet

Infrared Serial Communications
Technical Data MC68HC908LJ12 — Rev. 2.1
228 Infrared Serial Communications Interface Module (IRSCI) Freescale Semiconductor
13.9 SCI During Break Module Interrupts. . . . . . . . . . . . . . . . . . . .249
13.10 I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .249
13.10.1 PTB0/TxD (Transmit Data). . . . . . . . . . . . . . . . . . . . . . . . .249
13.10.2 PTB1/RxD (Receive Data) . . . . . . . . . . . . . . . . . . . . . . . . .249
13.11 I/O Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .250
13.11.1 SCI Control Register 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . .251
13.11.2 SCI Control Register 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . .253
13.11.3 SCI Control Register 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . .256
13.11.4 SCI Status Register 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .258
13.11.5 SCI Status Register 2 (SCS2) . . . . . . . . . . . . . . . . . . . . . .262
13.11.6 SCI Data Register (SCDR). . . . . . . . . . . . . . . . . . . . . . . . .263
13.11.7 SCI Baud Rate Register (SCBR) . . . . . . . . . . . . . . . . . . . .264
13.11.8 SCI Infrared Control Register. . . . . . . . . . . . . . . . . . . . . . .267
13.2 Introduction
This section describes the infrared serial communications interface
(IRSCI) module which allows high-speed asynchronous
communications with peripheral devices and other MCUs. This IRSCI
consists of an SCI module for conventional SCI functions and a software
programmable infrared encoder/decoder sub-module for
encoding/decoding the serial data for connection to infrared LEDs in
remote control applications.
NOTE: References to DMA (direct-memory access) and associated functions
are only valid if the MCU has a DMA module. This MCU does not have
the DMA function. Any DMA-related register bits should be left in their
reset state for normal MCU operation.