mc68hc908jb16 Freescale Semiconductor, Inc, mc68hc908jb16 Datasheet - Page 208

• Manufacturer Part Number: mc68hc908jb16
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Serial Communications Interface
12.2 Introduction
12.3 Features
Technical Data
208
NOTE:
12.8.2
12.9
12.9.1
12.9.2
12.9.3
12.9.4
12.9.5
12.9.6
12.9.7
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 the following:
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Serial Communications Interface Module (SCI)
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
Baud rate clock source is OSCDCLK (2 × OSCXCLK)
I/O Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
RxD (Receive Data) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228
SCI Control Register 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
SCI Control Register 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
SCI Control Register 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . 235
SCI Status Register 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238
SCI Status Register 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242
SCI Data Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
SCI Baud Rate Register . . . . . . . . . . . . . . . . . . . . . . . . . . .244
MC68HC908JB16
Freescale Semiconductor
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Rev. 1.1