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MC68HC08AZ32A Datasheet, PDF (209/456 Pages) Motorola, Inc – HCMOS Microcontroller Unit | |||
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Freescale Semiconductor, Inc.
Serial Communications Interface (SCI)
I/O Registers
15.8.1 PTE0/TxD (Transmit Data)
The PTE0/TxD pin is the serial data output from the SCI transmitter. The
SCI shares the PTE0/TxD pin with port E. When the SCI is enabled, the
PTE0/TxD pin is an output regardless of the state of the DDRE2 bit in
data direction register E (DDRE).
15.8.2 PTE1/RxD (Receive Data)
The PTE1/RxD pin is the serial data input to the SCI receiver. The SCI
shares the PTE1/RxD pin with port E. When the SCI is enabled, the
PTE1/RxD pin is an input regardless of the state of the DDRE1 bit in data
direction register E (DDRE).
15.9 I/O Registers
The following I/O registers control and monitor SCI operation:
⢠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)
15.9.1 SCI Control Register 1
SCI control register 1:
⢠Enables loop mode operation
⢠Enables the SCI
⢠Controls output polarity
⢠Controls character length
⢠Controls SCI wakeup method
MC68HC08AZ32A â Rev 1.0
MOTOROLA
Serial Communications Interface (SCI)
For More Information On This Product,
Go to: www.freescale.com
Technical Data
209
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