MC9S08AW60 FREESCALE [Freescale Semiconductor, Inc], MC9S08AW60 Datasheet - Page 192

• Manufacturer Part Number: MC9S08AW60
• Description: Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Chapter 11 Serial Communications Interface (S08SCIV2)
1
11.2.7
This register is actually two separate registers. Reads return the contents of the read-only receive data
buffer and writes go to the write-only transmit data buffer. Reads and writes of this register are also
involved in the automatic flag clearing mechanisms for the SCI status flags.
11.3
The SCI allows full-duplex, asynchronous, NRZ serial communication among the MCU and remote
devices, including other MCUs. The SCI comprises a baud rate generator, transmitter, and receiver block.
The transmitter and receiver operate independently, although they use the same baud rate generator. During
normal operation, the MCU monitors the status of the SCI, writes the data to be transmitted, and processes
received data. The following describes each of the blocks of the SCI.
192
Setting TXINV inverts the TxD output for all cases: data bits, start and stop bits, break, and idle.
Reset
TXINV
TXDIR
Field
ORIE
NEIE
FEIE
PEIE
5
4
3
2
1
0
W
R
1
Functional Description
SCI Data Register (SCIxD)
TxD Pin Direction in Single-Wire Mode — When the SCI is configured for single-wire half-duplex operation
(LOOPS = RSRC = 1), this bit determines the direction of data at the TxD pin.
0 TxD pin is an input in single-wire mode.
1 TxD pin is an output in single-wire mode.
Transmit Data Inversion — Setting this bit reverses the polarity of the transmitted data output.
0 Transmit data not inverted
1 Transmit data inverted
Overrun Interrupt Enable — This bit enables the overrun flag (OR) to generate hardware interrupt requests.
0 OR interrupts disabled (use polling).
1 Hardware interrupt requested when OR = 1.
Noise Error Interrupt Enable — This bit enables the noise flag (NF) to generate hardware interrupt requests.
0 NF interrupts disabled (use polling).
1 Hardware interrupt requested when NF = 1.
Framing Error Interrupt Enable — This bit enables the framing error flag (FE) to generate hardware interrupt
requests.
0 FE interrupts disabled (use polling).
1 Hardware interrupt requested when FE = 1.
Parity Error Interrupt Enable — This bit enables the parity error flag (PF) to generate hardware interrupt
requests.
0 PF interrupts disabled (use polling).
1 Hardware interrupt requested when PF = 1.
R7
T7
0
7
Table 11-7. SCIxC3 Register Field Descriptions (continued)
R6
T6
0
6
Figure 11-11. SCI Data Register (SCIxD)
R5
T5
0
5
MC9S08AW60 Data Sheet, Rev 2
R4
T4
0
4
Description
R3
T3
3
0
R2
T2
0
2
Freescale Semiconductor
R1
T1
0
1
R0
T0
0
0