Holtek HT48R10A-1 - System Clock Configurations

The following tables show actual values of baud rate and error values for the two values of BRGH.
Baud
Rate
Kbps
Baud Rates for BRGH = 0
f
SYS
= 8MHz f
SYS
= 7.159MHz f
SYS
= 4MHz f
SYS
= 3.579545MHz
BRG Kbaud Error BRG Kbaud Error BRG Kbaud Error BRG Kbaud Error
0.3
¾¾¾¾¾¾
207 0.300 0.00 185 0.300 0.00
1.2 103 1.202 0.16 92 1.203 0.23 51 1.202 0.16 46 1.19 -0.83
2.4 51 2.404 0.16 46 2.38 -0.83 25 2.404 0.16 22 2.432 1.32
4.8 25 4.807 0.16 22 4.863 1.32 12 4.808 0.16 11 4.661 -2.9
9.6 12 9.615 0.16 11 9.322 -2.9 6 8.929 -6.99 5 9.321 -2.9
19.2 6 17.857 -6.99 5 16.64 -2.9 2 20.83 8.51 2 18.643 -2.9
38.4 2 41.667 8.51 2 37.29 -2.9 1
¾¾
1
¾¾
57.6 1 62.5 8.51 1 55.93 -2.9 0 62.5 8.51 0 55.93 -2.9
115.2 0 125 8.51 0 111.86 -2.9
¾¾¾¾¾¾
Baud Rates and Error Values for BRGH = 0
Baud
Rate
Kbps
Baud Rates for BRGH = 1
f
SYS
= 8MHz f
SYS
= 7.159MHz f
SYS
= 4MHz f
SYS
= 3.579545MHz
BRG Kbaud Error BRG Kbaud Error BRG Kbaud Error BRG Kbaud Error
0.3
¾¾¾¾¾¾¾¾¾¾¾¾
1.2
¾¾¾¾¾¾
207 1.202 0.16 185 1.203 0.23
2.4 207 2.404 0.16 185 2.405 0.23 103 2.404 0.16 92 2.406 0.23
4.8 103 4.808 0.16 92 4.811 0.23 51 4.808 0.16 46 4.76 -0.83
9.6 51 9.615 0.16 46 9.520 -0.832 25 9.615 0.16 22 9.727 1.32
19.2 25 19.231 0.16 22 19.454 1.32 12 19.231 0.16 11 18.643 -2.9
38.4 12 38.462 0.16 11 37.287 -2.9 6 35.714 -6.99 5 37.286 -2.9
57.6 8 55.556 -3.55 7 55.93 -2.9 3 62.5 8.51 3 55.930 -2.9
115.2 3 125 8.51 3 111.86 -2.9 1 125 8.51
1
111.86 -2.9
250 1 250 0
¾¾¾
0 250 0
¾¾¾
Baud Rates and Error Values for BRGH = 1
74
I/O Type MCU