Motorola MC68HC908AB32 User Manual

Serial Communications Interface
Technical Data MC68HC908AB32 — Rev. 1.0
240 Serial Communications Interface Module (SCI) MOTOROLA
15.8.2 PTE1/RxD (Receive Data) . . . . . . . . . . . . . . . . . . . . . . . . .260
15.9 I/O Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .261
15.9.1 SCI Control Register 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . .261
15.9.2 SCI Control Register 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . .264
15.9.3 SCI Control Register 3 . . . . . . . . . . . . . . . . . . . . . . . . . . .267
15.9.4 SCI Status Register 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .269
15.9.5 SCI Status Register 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .273
15.9.6 SCI Data Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .274
15.9.7 SCI Baud Rate Register. . . . . . . . . . . . . . . . . . . . . . . . . . .275
15.2 Introduction
This section describes the serial communications interface (SCI)
module, which allows high-speed asynchronous communications with
peripheral devices and other MCUs.
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.
15.3 Features
Features of the SCI module include the following:
• Full-duplex operation
• Standard mark/space non-return-to-zero (NRZ) format
• 32 programmable baud rates
• Programmable 8-bit or 9-bit character length
• Separately enabled transmitter and receiver
• Separate receiver and transmitter CPU interrupt requests
• Programmable transmitter output polarity

Motorola MC68HC908AB32 Specifications

General

Brand	Motorola
Model	MC68HC908AB32
Category	Controller
Language	English