MC9S12G FREESCALE [Freescale Semiconductor, Inc], MC9S12G Datasheet - Page 570

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

Serial Communication Interface (S12SCIV5)
18.3.2.2
Read: Anytime, if AMAP = 0.
Write: Anytime, if AMAP = 0.
570
Module Base + 0x0002
SBR[12:0]
TNP[1:0]
Reset
IREN
Field
This document is valid for the S12G96 and the S12G128 device. All information related to other devices is preliminary.
6:5
4:0
7:0
7
W
R
LOOPS
Infrared Enable Bit — This bit enables/disables the infrared modulation/demodulation submodule.
0 IR disabled
1 IR enabled
Transmitter Narrow Pulse Bits — These bits enable whether the SCI transmits a 1/16, 3/16, 1/32 or 1/4 narrow
pulse. See
SCI Baud Rate Bits — The baud rate for the SCI is determined by the bits in this register. The baud rate is
calculated two different ways depending on the state of the IREN bit.
The formulas for calculating the baud rate are:
Note: The baud rate generator is disabled after reset and not started until the TE bit or the RE bit is set for the
Note: Writing to SCIBDH has no effect without writing to SCIBDL, because writing to SCIBDH puts the data in
SCI Control Register 1 (SCICR1)
0
7
When IREN = 0 then,
When IREN = 1 then,
This register is only visible in the memory map if AMAP = 0 (reset
condition).
SCI baud rate = SCI bus clock / (16 x SBR[12:0])
SCI baud rate = SCI bus clock / (32 x SBR[12:1])
first time. The baud rate generator is disabled when (SBR[12:0] = 0 and IREN = 0) or (SBR[12:1] = 0 and
IREN = 1).
a temporary location until SCIBDL is written to.
Table
SCISWAI
0
6
18-3.
Table 18-2. SCIBDH and SCIBDL Field Descriptions
TNP[1:0]
Figure 18-5. SCI Control Register 1 (SCICR1)
11
10
01
00
MC9S12G Family Reference Manual,
Table 18-3. IRSCI Transmit Pulse Width
RSRC
5
0
NOTE
M
0
4
Narrow Pulse Width
Description
WAKE
1/32
1/16
3/16
1/4
0
3
Rev.1.01
ILT
2
0
Freescale Semiconductor
PE
0
1
PT
0
0