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(ii) Generation of baud rate transmit/receive clock by means of external clock from ASCK pin
The transmit/receive clock is generated by scaling the clock input from the ASCK pin. The baud rate
generated from the clock input from the ASCK pin is obtained with the following expression.
[Baud rate] =
f
:
Frequency of clock input to ASCK pin
ASCK
k
:
Value set in MDL0 to MDL3 (0
Table 19-6. Relationship Between ASCK Pin Input Frequency and Baud Rate (When BRGC Is Set to 00H)
454
CHAPTER 19 SERIAL INTERFACE CHANNEL 2
f
ASCK
[Hz]
2
(k+16)
Baud Rate (bps)
ASCK Pin Input Frequency
75
110
150
300
600
1200
2400
4800
9600
19200
31250
38400
k
14)
2.4 kHz
3.52 kHz
4.8 kHz
9.6 kHz
19.2 kHz
38.4 kHz
76.8 kHz
153.6 kHz
307.2 kHz
614.4 kHz
1000.0 kHz
1228.8 kHz
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