mc9s12e256 Freescale Semiconductor, Inc, mc9s12e256 Datasheet - Page 249

• Manufacturer Part Number: mc9s12e256
• Description: Hcs12 Microcontrollers 16-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Read: anytime
Write: anytime
The SCI baud rate register is used to determine the baud rate of the SCI and to control the infrared
modulation/demodulation submodule.
8.3.2.2
Read: anytime
Write: anytime
Freescale Semiconductor
Reset
W
R
LOOPS
SCI Control Register 1 (SCICR1)
0
7
If only SCIBDH is written to, a read will not return the correct data until
SCIBDL is written to as well, following a write to SCIBDH.
The baud rate generator is disabled after reset and not started until the TE
bit or the RE bit is set for the first time. The baud rate generator is disabled
when (SBR[12:0] = 0 and IREN = 0) or (SBR[12:1] = 0 and IREN = 1).
Writing to SCIBDH has no effect without writing to SCIBDL, because
writing to SCIBDH puts the data in a temporary location until SCIBDL is
written to.
SCISWAI
0
6
Figure 8-5. SCI Control Register 1 (SCICR1)
TNP[1:0]
Table 8-3. IRSCI Transmit Pulse Width
11
10
01
00
RSRC
MC9S12E256 Data Sheet, Rev. 1.08
0
5
NOTE
NOTE
M
0
4
Narrow Pulse Width
1/32
1/16
3/16
1/4
WAKE
3
0
Chapter 8 Serial Communication Interface (SCIV4)
ILT
0
2
PE
0
1
PT
0
0
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