6.
Baud Rate Settings
A baud rate is set by software by dividing the clock input (1.8432MHz). The baud rate in terms of
hardware can be set to a maximum of 115,200 bps for SERIAL A, EXT Serial A, B. The baud rates
available in practice depend on the operating environment (cable, software, etc.). The table below lists
typical baud rates and their respective values to be written to the divisor latch register (LSB, MSB).
Table 6.6. Baud Rate Settings
SERIAL A, EXT Serial A, B
Clock input (1.8432MHz)
Baud rate to be set
Value to be set
in the divisor register
(Decimal)
Setting error (%)
50 2304
---
75 1536
---
110 1047
0.026
134.5 857
0.058
150 768
---
300 384
---
600 192
---
1200 96
---
1800 64
---
2000 58
0.69
2400 48
---
3600 32
---
4800 24
---
7200 16
---
9600 12
---
14400 8
---
19200 6
---
28800 4
---
38400 3
---
57600 2
---
76800 ---
---
115200 1 ---
153600 --- ---
230400 --- ---
Example: To set Serial A to 9,600 bps, write “00” to the (MSB) divisor latch register and “12 (decimal)” to the (LSB)
divisor latch register.
98
PT-955LS-AC
User’s
manual
