
16.8 Transfer Baud Rate
The transfer baud rate of UART is set by UART0CR1<BRG>, UART0DR and UART0CR2<RTSEL>.
Table16-6 and
Table 16-7 show the settings of UART0DR and UART0CR2<RTSEL> for general baud rates and operating
frequencies.
Table 16-6 Set Values of UART0DR and UART0CR2<RTSEL> for Transfer Baud Rates (fcgck=10 to 1 MHz,
UART0CR2<RXDNC>=0y00)
Basic
baud rate
[baud]
Register
Operating frequency
10MHz
8MHz
7.3728
MHz
6.144
MHz
6MHz
5MHz
4.9152
MHz
4.19MHz
4MHz
2MHz
1MHz
128000
UART0DR
0x04
0x03
-
0x02
-
0x01
0x00
-
RTSEL
0y011
-
0y000
0y011
-
0y001
0y011
-
Error
(+0.81%)
-
(0%)
(+0.81%)
-
(-0.80%)
(+0.81%)
-
115200
UART0DR
0x04
0x03
-
0x02
-
0x01
0x00
-
RTSEL
0y100
0y000
-
0y100
-
0y100
-
Error
(+2.12%)
(0%)
-
(+2.12%)
-
(+2.12%)
-
76800
UART0DR
0x07
0x06
0x05
0x04
0x03
-
0x02
-
RTSEL
0y001
0y010
0y000
0y011
0y001
0y000
-
0y100
-
Error
(-1.36%)
(-0.79%)
(0%)
(+0.81%)
(-1.36%)
(0%)
-
(+2.12%)
-
62500
UART0DR
0x09
0x07
0x06
0x05
0x04
0x03
0x01
0x00
RTSEL
0y000
0y100
0y001
0y000
0y011
0y100
0y000
Error
(0%)
(-0.87%)
(-0.70%)
(0%)
(+1.48%)
(-1.41%)
(0%)
57600
UART0DR
0x0A
0x08
0x07
0x06
0x04
-
0x03
0x01
0x00
RTSEL
0y000
0y011
0y000
0y010
0y100
-
0y100
Error
(-1.36%)
(-0.44%)
(0%)
(+1.59%)
(-0.79%)
(+2.12%)
(+0.39%)
-
(+2.12%)
38400
UART0DR
0x10
0x0C
0x0B
0x09
0x07
0x06
0x02
-
RTSEL
0y011
0y000
0y011
0y001
0y000
0y011
0y010
0y100
-
Error
(-1.17%)
(+0.16%)
(0%)
(+0.81%)
(-1.36%)
(0%)
(+0.57%)
(-0.79%)
(+2.12%)
-
19200
UART0DR
0x22
0x19
0x17
0x13
0x12
0x10
0x0F
0x0D
0x0C
0x06
0x02
RTSEL
0y010
0y000
0y001
0y011
0y000
0y011
0y000
0y010
0y100
Error
(-0.79%)
(+0.16%)
(0%)
(-0.32%)
(-1.17%)
(0%)
(+0.57%)
(+0.16%)
(-0.79%)
(+2.12%)
9600
UART0DR
0x40
0x30
0x2F
0x27
0x26
0x22
0x1F
0x1C
0x19
0x0C
0x06
RTSEL
0y000
0y100
0y000
0y010
0y000
0y010
0y000
0y010
Error
(+0.16%)
(+0.04%)
(0%)
(+0.16%)
(-0.79%)
(0%)
(+0.34%)
(+0.16%)
(-0.79%)
4800
UART0DR
0x8A
0x64
0x5F
0x4F
0x4D
0x40
0x3F
0x34
0x30
0x19
0x0C
RTSEL
0y010
0y001
0y000
0y001
0y100
0y000
Error
(-0.08%)
(+0.01%)
(0%)
(+0.16%)
(0%)
(-0.18%)
(+0.04%)
(+0.16%)
2400
UART0DR
0xF4
0xC9
0xBF
0x9F
0x92
0x8A
0x7F
0x6C
0x64
0x30
0x19
RTSEL
0y100
0y001
0y000
0y100
0y010
0y000
0y001
0y100
0y000
Error
(+0.04%)
(+0.01%)
(0%)
(+0.04%)
(-0.08%)
(0%)
(+0.11%)
(+0.01%)
(+0.04%)
(+0.16%)
1200
UART0DR
-
0xF4
0xFF
0xE8
0xC9
0x64
0x30
RTSEL
-
0y100
0y000
0y010
0y001
0y100
Error
-
(+0.04%)
(+0%)
(-0.10%)
(+0.01%)
(+0.04%)
TMP89FH42
Page 231
RA001