mc68hc908gp20 Freescale Semiconductor, Inc, mc68hc908gp20 Datasheet - Page 248

• Manufacturer Part Number: mc68hc908gp20
• Description: M68hc08 Family Of 8-bit Microcontroller Units Mcus
• Manufacturer: Freescale Semiconductor, Inc

18.2 Introduction
18.3 Features
Advance Information
248
NOTE:
18.9
18.9.1
18.9.2
18.9.3
18.9.4
18.9.5
18.9.6
18.9.7
This section describes the serial communications interface (SCI)
module, which allows high-speed asynchronous communications with
peripheral devices and other MCUs.
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.
Features of the SCI module include:
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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
I/O Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 269
SCI Control Register 1 . . . . . . . . . . . . . . . . . . . . . . . . . . .269
SCI Control Register 2 . . . . . . . . . . . . . . . . . . . . . . . . . . .272
SCI Control Register 3 . . . . . . . . . . . . . . . . . . . . . . . . . . .275
SCI Status Register 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278
SCI Status Register 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 282
SCI Data Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .283
SCI Baud Rate Register . . . . . . . . . . . . . . . . . . . . . . . . . . 284
MC68HC908GP20
Freescale Semiconductor
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Rev 2.1