NEC 78K0 Series User Manual page 344

(3) Example of setting baud rate
Baud f = 2.0 MHz
PRS
Rate
k
TPS01, Calculated
[bps]
TPS00 Value
4800 2 26 4808
9600 2 13 9615
10400 2 12 10417
19200 1 26 19231
24000 1 21 23810
31250 1 16 31250
33660 1 15 33333
38400 1 13 38462
56000 1 9 55556
62500 1 8 62500
− − −
76800
− − −
115200
− − −
153600
Remark TPS01, TPS00: Bits 7 and 6 of baud rate generator control register 0 (BRGC0) (setting of base clock
k:
f :
PRS
ERR:
344
CHAPTER 14 SERIAL INTERFACE UART0
Table 14-5. Set Data of Baud Rate Generator
f = 5.0 MHz
PRS
ERR k
TPS01, Calculated
[%]
TPS00 Value
0.16 3 16 4883
0.16 3 8 9766
0.16 2 30 10417
0.16 2 16 19531
−0.79
2 13 24038
0 2 10 31250
−0.79
2 9 34722
0.16 2 8 39063
−0.79
1 22 56818
0 1 20 62500
−
1 16 78125
− 113636 −1.36
1 11
−
1 8 156250
(f ))
XCLK0
Value set by the MDL04 to MDL00 bits of BRGC0 (k = 8, 9, 10, ..., 31)
Peripheral hardware clock frequency
Baud rate error
Preliminary User's Manual U17260EJ3V1UD
f = 10.0 MHz
PRS
ERR k
TPS01, Calculated
[%]
TPS00 Value
− − −
1.73
1.73 3 16 9766
0.16 3 15 10417
1.73 3 8 19531
0.16 2 26 24038
0 2 20 31250
3.34 2 18 34722
1.73 2 16 39063
1.46 2 11 56818
0 2 10 62500
1.73 2 8 78125
113636 −1.36
1 22
1.73 1 16 156250
f = 20.0 MHz
PRS
ERR k
TPS01, Calculated
[%]
TPS00 Value
− − − −
− − −
1.73
0.16 3 30 10417
1.73 3 16 19531
0.16 3 13 24038
0 3 10 31250
3.34 3 9 34722
1.73 3 8 39063
1.46 2 22 56818
0 2 20 62500
1.73 2 16 78125
113636 −1.36
2 11
1.73 2 8 156250
ERR
[%]
−
−
0.16
1.73
0.16
0
3.34
1.73
1.46
0
1.73
1.73