Panasonic JS-170FR Series Service Manual page 49

The I/O levels of the UART1,2 signals of the IT8673F1 are maintained at the TTL level. The ADM211 is used outside the UART2
for use as the driver or receiver of the RS-232-C interface. The ADM211 is an IC of 4 outputs and 5 inputs, and works only with a
single power supply of +5V. Both COM1 and COM2 are used as the general-purpose serial ports toward the outside.
Baud rate
50
75
110
150
300
600
1200
1800
2000
2400
3600
4800
7200
9600
19200
38400
56000
The Baud rate used is based on 1.8462MHz (13-frequency-divided from 24MHz).
Register frequency division
Hexadecimal Decimal
900H 2304D
600 1536
417 1047
300 768
180 384
C0 192
60 96
40 64
3A 58
30 48
20 32
18 24
10 16
C 12
6
3
2
2-19
Error rate (%)
0.160
0.160
0.186
0.160
0.160
0.160
0.160
0.160
0.530
0.160
0.160
0.160
0.160
0.160
6 0.160
3 0.060
2 3.022