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MC80F0224 Datasheet, PDF (84/128 Pages) List of Unclassifed Manufacturers – 8-BIT SINGLE-CHIP MICROCONTROLLERS
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MC80F0208/16/24
Preliminary
Baud rate generator control register (BRGCR)
This register sets the serial clock for serial interface. BRGCR is
set by an 8 bit memory manipulation instruction. The RESET in-
put sets BRGCR to -001_0000B.
Figure 17-6 shows the format of BRGCR.
.
BRGCR0
R
R
R
7
6
5
4
3
2
1
0
- TPS02 TPS01 TPS00 MBTDCLL03MDL02MDL01MDL00
ADDRESS: 0E8H
INITIAL VALUE: -001 0000B
UART0 Input Clock Selection
0000: fSCK / 16
0001: fSCK / 17
0010: fSCK / 18
0011: fSCK / 19
0100: fSCK / 20
0101: fSCK / 21
0110: fSCK / 22
0111: fSCK / 23
1000: fSCK / 24
1001: fSCK / 25
1010: fSCK / 26
1011: fSCK / 27
1100: fSCK / 28
1101: fSCK / 29
1110: fSCK / 30
1111: Setting prohibited
UART0 Source Clock Selection for 5 bit count
000: ACLK/R45
001: fXIN / 2
010: fXIN / 4
011: fXIN / 8
100: fXIN / 16
101: fXIN / 32
110: fXIN / 64
111: fXIN / 128
Caution Writing to BRGCR0 during a communication operation may cause abnormal output from the baud rate generator and
disable further communication operations. Therefore, do not write to BRGCR0 during a communication operation.
Remarks 1. fSCK : Source clock for 5 bit counter
2. n : Value set via TPS0 to TPS2 ( 0 ≤ n ≤ 7 )
3. k : Source clock for 5 bit counter ( 0 ≤ k ≤ 14 )
Figure 17-6 Baud Rate Generator Control Register0(BRGCR) Format
80
MAR. 2005 Ver 0.2
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