mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 480

• Manufacturer Part Number: mc9s12xd256
• Description: Hcs12x Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 11 Serial Communication Interface (S12SCIV5)
11.2
The SCI module has a total of two external pins.
11.2.1
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.
11.2.2
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.
11.3
This section provides a detailed description of all the SCI registers.
11.3.1
The memory map for the SCI module is given below in
the address offset. The total address for each register is the sum of the base address for the SCI module and
the address offset for each register.
480
External Signal Description
Memory Map and Register Definition
TXD — Transmit Pin
RXD — Receive Pin
Module Memory Map and Register Definition
MC9S12XDP512 Data Sheet, Rev. 2.17
Figure
11-2. The address listed for each register is
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