UPD78F9418A NEC, UPD78F9418A Datasheet - Page 182

• Manufacturer Part Number: UPD78F9418A
• Description: (UPD7894xxA) 8-Bit Single Chip Microcontrollers
• Manufacturer: NEC

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182
(b)
Generation of baud rate transmit/receive clock from external clock of ASCK pin
The transmit/receive clock is generated by dividing the clock input from the ASCK pin. The baud rate
generated from the clock input from the ASCK pin is estimated by using the following expression.
f
ASCK
[Baud rate] =
: Frequency of clock input to the ASCK pin
Table 13-4. Relationship Between ASCK Pin Input Frequency
Baud Rate (bps)
19200
31250
38400
1200
2400
4800
9600
150
300
600
75
and Baud Rate (When BRGC00 Is Set to 80H)
CHAPTER 13 SERIAL INTERFACE 00
f
ASCK
16
User’s Manual U13952EJ3V0UD
[Hz]
ASCK Pin Input Frequency (kHz)
153.6
307.2
500.0
614.4
19.2
38.4
76.8
1.2
2.4
4.8
9.6