mc9s12hz256v2 Freescale Semiconductor, Inc, mc9s12hz256v2 Datasheet - Page 388
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mc9s12hz256v2
Manufacturer Part Number
mc9s12hz256v2
Description
Hcs12 Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC9S12HZ256V2.pdf
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Chapter 13 Serial Communication Interface (SCIV4)
13.1.3
The SCI functions the same in normal, special, and emulation modes. It has two low-power modes, wait
and stop modes.
13.1.3.1
Normal mode of operation.
13.1.3.2
SCI operation in wait mode depends on the state of the SCISWAI bit in the SCI control register 1
(SCICR1).
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Programmable transmitter output parity
Two receiver wakeup methods:
— Idle line wakeup
— Address mark wakeup
Interrupt-driven operation with eight flags:
— Transmitter empty
— Transmission complete
— Receiver full
— Idle receiver input
— Receiver overrun
— Noise error
— Framing error
— Parity error
Receiver framing error detection
Hardware parity checking
1/16 bit-time noise detection
If SCISWAI is clear, the SCI operates normally when the CPU is in wait mode.
If SCISWAI is set, SCI clock generation ceases and the SCI module enters a power-conservation
state when the CPU is in wait mode. Setting SCISWAI does not affect the state of the receiver
enable bit, RE, or the transmitter enable bit, TE.
If SCISWAI is set, any transmission or reception in progress stops at wait mode entry. The
transmission or reception resumes when either an internal or external interrupt brings the CPU out
of wait mode. Exiting wait mode by reset aborts any transmission or reception in progress and
resets the SCI.
Modes of Operation
Run Mode
Wait Mode
MC9S12HZ256 Data Sheet, Rev. 2.05
Freescale Semiconductor
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