NEC 78K0/KD1 Series User Manual page 307

(3) Example of setting baud rate
Baud Rate f = 10.0 MHz
X
[bps]
TPS63 to k
TPS60
600 6H 130
1200 5H 130
2400 4H 130
4800 3H 130
9600 2H 130
10400 2H 120
19200 1H 130
31250 1H 80
38400 0H 130
76800 0H 65
115200 0H 43
153600 0H 33
230400 0H 22
Caution The maximum permissible frequency of the base clock (f
Remark TPS63 to TPS60: Bits 3 to 0 of clock selection register 6 (CKSR6) (setting of base clock (f
k:
f :
X
ERR:
CHAPTER 14 SERIAL INTERFACE UART6
Table 14-4. Set Data of Baud Rate Generator
Calculated ERR[%] TPS63 to
Value TPS60
601 0.16 6H
1202 0.16 5H
2404 0.16 4H
4808 0.16 3H
9615 0.16 2H
10417 0.16 2H
19231 0.16 1H
31250 0.00 0H
38462 0.16 0H
76923 0.16 0H
116279 0.94 0H
−1.36
151515 0H
−1.36
227272 0H
Value set by MDL67 to MDL60 bits of baud rate generator control register 6
(BRGC6) (k = 8, 9, 10, ..., 255)
X1 input clock oscillation frequency
Baud rate error
Preliminary User's Manual U16315EJ1V0UD
f = 8.38 MHz
X
k Calculated ERR[%] TPS63 to
Value TPS60
109 601 0.11
109 1201 0.11
109 2403 0.11
109 4805 0.11
109 9610 0.11
101 10371 0.28
109 19200 0.11
134 31268 0.06
109 38440 0.11
−0.80
55 76182
36 116388 1.03
27 155185 1.03
18 232777 1.03
) is 25 MHz.
XCLK
f = 4.19 MHz
X
k Calculated ERR[%]
Value
5H 109 601 0.11
4H 109 1201 0.11
3H 109 2403 0.11
2H 109 4805 0.11
1H 109 9610 0.11
−0.28
1H 101 10475
0H 109 19220 0.11
0H 67 31268 0.06
−0.80
0H 55 38090
0H 27 77593 1.03
0H 18 116389 1.03
−2.58
0H 14 149643
0H 9 232778 1.03
))
XCLK
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