NEC uPD78056Y - Manual (Page 451)

451
CHAPTER 19 SERIAL INTERFACE CHANNEL 2
(b) 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] = [Hz]
f
ASCK
: Frequency of clock input to ASCK pin
k : Value set in MDL0 to MDL3 (0
≤
k
≤
14)
Table 19-4. Relation between ASCK Pin Input Frequency and Baud Rate (When BRGC is set to 00H)
Baud Rate (bps) ASCK Pin Input Frequency
75 2.4 kHz
110 3.52 kHz
150 4.8 kHz
300 9.6 kHz
600 19.2 kHz
1200 38.4 kHz
2400 76.8 kHz
4800 153.6 kHz
9600 307.2 kHz
19200 614.4 kHz
31250 1000.0 kHz
38400 1228.8 kHz
f
ASCK
2
×
(k+16)