MC68HC708XL36 FREESCALE [Freescale Semiconductor, Inc], MC68HC708XL36 Datasheet - Page 263

• Manufacturer Part Number: MC68HC708XL36
• Description: HCMOS Microcontroller Unit
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

I/O Signals
TxD
(Transmit Data)
RxD
(Receive Data)
I/O Registers
29-sci_d
MOTOROLA
Port E shares two of its pins with the SCI module. The two SCI I/O pins
are:
The TxD pin is the serial data output from the SCI transmitter. The SCI
shares the TxD pin with port E. When the SCI is enabled, the TxD pin is
an output regardless of the state of the DDRE2 bit in data direction
register E (DDRE).
The RxD pin is the serial data input to the SCI receiver. The SCI shares
the RxD pin with port E. When the SCI is enabled, the RxD pin is an input
regardless of the state of the DDRE1 bit in data direction register E
(DDRE).
The following I/O registers control and monitor SCI operation:
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Freescale Semiconductor, Inc.
For More Information On This Product,
TxD — Transmit data
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)
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SCI
MC68HC708XL36
I/O Signals
SCI
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