MC9S12G FREESCALE [Freescale Semiconductor, Inc], MC9S12G Datasheet - Page 567

• Manufacturer Part Number: MC9S12G
• Description: Ignores external trigger. Performs one conversion sequence and stops.
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

18.1.4
Figure 18-1
blocks.
18.2
The SCI module has a total of two external pins.
18.2.1
The TXD pin transmits SCI (standard or infrared) data. It will idle high in either mode and is high
impedance anytime the transmitter is disabled.
18.2.2
The RXD pin receives SCI (standard or infrared) data. An idle line is detected as a line high. This input is
ignored when the receiver is disabled and should be terminated to a known voltage.
18.3
This section provides a detailed description of all the SCI registers.
Freescale Semiconductor
RXD Data In
Bus Clock
This document is valid for the S12G96 and the S12G128 device. All information related to other devices is preliminary.
External Signal Description
Memory Map and Register Definition
Block Diagram
TXD — Transmit Pin
RXD — Receive Pin
is a high level block diagram of the SCI module, showing the interaction of various function
Baud Rate
Generator
Decoder
Infrared
1/16
MC9S12G Family Reference Manual, Rev.1.01
Transmit Shift Register
Receive Shift Register
Data Format Control
Figure 18-1. SCI Block Diagram
Receive & Wakeup
SCI Data Register
SCI Data Register
Transmit Control
Control
Generation
Generation
Interrupt
Transmit
Interrupt
Encoder
Receive
Infrared
RXEDG
Serial Communication Interface (S12SCIV5)
IDLE
RDRF/OR
BRKD
BERR
TDRE
TC
Data Out TXD
Interrupt
Request
SCI
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