MC80F0204 Datasheet, PDF (79/126 Pages) List of Unclassifed Manufacturers – 8-BIT SINGLE-CHIP MICROCONTROLLERS

Preliminary
MC80F0104/0204
Baud rate generator control register (BRGCR)
This register sets the serial clock for serial interface.
BRGCR is set by an 8 bit memory manipulation instruc-
tion. The RESET input sets BRGCR to -001_0000B.
Figure 16-5 shows the format of BRGCR.
BRGCR
R/W R/W R/W R/W R/W R/W R/W
7
6
5
4
3
2
1
0
- TPS2 TPS1 TPS0 ^BMTDCLL3 MDL2 MDL1 MDL0
ADDRESS: 0E8_H
INITIAL VALUE: -001 0000_B
UART Input Clock Selection
0000: f_SCK ÷ 16
0001: f_SCK ÷ 17
0010: f_SCK ÷ 18
0011: f_SCK ÷ 19
0100: f_SCK ÷ 20
0101: f_SCK ÷ 21
0110: f_SCK ÷ 22
0111: f_SCK ÷ 23
1000: f_SCK ÷ 24
1001: f_SCK ÷ 25
1010: f_SCK ÷ 26
1011: f_SCK ÷ 27
1100: f_SCK ÷ 28
1101: f_SCK ÷ 29
1110: f_SCK ÷ 30
1111: Setting prohibited
UART Source Clock Selection for 5 bit count
000: ACLK
001: f_XIN ÷ 2
010: f_XIN ÷ 4
011: f_XIN ÷ 8
100: f_XIN ÷ 16
101: f_XIN ÷ 32
110: f_XIN ÷ 64
111: f_XIN ÷ 128
Caution Writing to BRGCR during a communication operation may cause abnormal output from the baud rate generator and
disable further communication operations. Therefore, do not write to BRGCR during a communication operation.
Remarks 1. fSCK : Source clock for 5 bit counter
Figure 16-5 Baud Rate Generator Control Register (BRGCR) Format
Mar. 2005 Ver 0.2
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