mc68hc908mr24 Freescale Semiconductor, Inc, mc68hc908mr24 Datasheet - Page 303

• Manufacturer Part Number: mc68hc908mr24
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

14.7 I/O Signals
14.7.1 PTE2/TxD (Transmit Data)
14.7.2 PTE1/RxD (Receive Data)
14.8 I/O Registers
MC68HC908MR24 — Rev. 4.1
Freescale Semiconductor
Port F shares two of its pins with the SCI module. The two SCI
input/output (I/O) pins are:
The PTE2/TxD pin is the serial data output from the SCI transmitter. The
SCI shares the PTE2/TxD pin with port F. When the SCI is enabled, the
PTE2/TxD pin is an output regardless of the state of the DDRF5 bit in
data direction register F (DDRF).
The PTE1/RxD pin is the serial data input to the SCI receiver. The SCI
shares the PTE1/RxD pin with port F. When the SCI is enabled, the
PTE1/RxD pin is an input regardless of the state of the DDRF4 bit in data
direction register F (DDRF).
These I/O registers control and monitor SCI operation:
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Serial Communications Interface Module (SCI)
PTE2/TxD — Transmit data
PTE1/RxD — Receive data
SCI control register 1, SCC1
SCI control register 2, SCC2
SCI control register 3, SCC3
SCI status register 1, SCS1
SCI status register 2, SCS2
SCI data register, SCDR
SCI baud rate register, SCBR
Serial Communications Interface Module (SCI)
Advance Information
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