MC68HC08AS32 Datasheet, PDF (236/394 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs)

Serial Communications Interface (SCI)
17.9 I/O Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .257
17.9.1 SCI Control Register 1 . . . . . . . . . . . . . . . . . . . . . . . . . . .257
17.9.2 SCI Control Register 2 . . . . . . . . . . . . . . . . . . . . . . . . . . .261
17.9.3 SCI Control Register 3 . . . . . . . . . . . . . . . . . . . . . . . . . . .263
17.9.4 SCI Status Register 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . .265
17.9.5 SCI Status Register 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . .269
17.9.6 SCI Data Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .270
17.9.7 SCI Baud Rate Register . . . . . . . . . . . . . . . . . . . . . . . . . .271
17.2 Introduction
This section describes the serial communications interface module (SCI,
Version D), which allows high-speed asynchronous communications
with peripheral devices and other MCUs.
17.3 Features
Features of the SCI module include:
• 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
• Two receiver wakeup methods:
– Idle line wakeup
– Address mark wakeup
Advance Information
236
Serial Communications Interface (SCI)
MC68HC08AS32 — Rev. 3.0
MOTOROLA