MC9S12G FREESCALE [Freescale Semiconductor, Inc], MC9S12G Datasheet - Page 578

• Manufacturer Part Number: MC9S12G
• Description: Ignores external trigger. Performs one conversion sequence and stops.
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Serial Communication Interface (S12SCIV5)
18.3.2.9
Read: Anytime; reading accesses SCI receive data register
Write: Anytime; writing accesses SCI transmit data register; writing to R8 has no effect
578
Module Base + 0x0006
Module Base + 0x0007
RXPOL
BRK13
TXDIR
Reset
Reset
Field
This document is valid for the S12G96 and the S12G128 device. All information related to other devices is preliminary.
RAF
3
2
1
0
W
W
R
R
Receive Polarity — This bit control the polarity of the received data. In NRZ format, a one is represented by a
mark and a zero is represented by a space for normal polarity, and the opposite for inverted polarity. In IrDA
format, a zero is represented by short high pulse in the middle of a bit time remaining idle low for a one for normal
polarity, and a zero is represented by short low pulse in the middle of a bit time remaining idle high for a one for
inverted polarity.
0 Normal polarity
1 Inverted polarity
Break Transmit Character Length — This bit determines whether the transmit break character is 10 or 11 bit
respectively 13 or 14 bits long. The detection of a framing error is not affected by this bit.
0 Break character is 10 or 11 bit long
1 Break character is 13 or 14 bit long
Transmitter Pin Data Direction in Single-Wire Mode — This bit determines whether the TXD pin is going to
be used as an input or output, in the single-wire mode of operation. This bit is only relevant in the single-wire
mode of operation.
0 TXD pin to be used as an input in single-wire mode
1 TXD pin to be used as an output in single-wire mode
Receiver Active Flag — RAF is set when the receiver detects a logic 0 during the RT1 time period of the start
bit search. RAF is cleared when the receiver detects an idle character.
0 No reception in progress
1 Reception in progress
R8
R7
T7
SCI Data Registers (SCIDRH, SCIDRL)
0
0
7
7
T8
R6
T6
= Unimplemented or Reserved
0
0
6
6
Table 18-12. SCISR2 Field Descriptions (continued)
Figure 18-12. SCI Data Registers (SCIDRH)
Figure 18-13. SCI Data Registers (SCIDRL)
MC9S12G Family Reference Manual,
R5
T5
5
0
0
5
0
R4
T4
0
0
0
4
4
Description
R3
T3
0
0
0
3
3
Rev.1.01
R2
T2
2
0
0
2
0
Freescale Semiconductor
R1
T1
0
0
0
1
1
R0
T0
0
0
0
0
0