NEC UPD703116 User Manual page 473

<4> Baud rate setting example
In an actual system, the output of a prescaler module, etc. is connected to input clock. Table 10-8
shows the baud rate generator setting data at this time.
Table 10-8. Baud Rate Generator Setting Data (BRG = f
Target Baud Rate
Synchronous Asynchronous
Mode Mode
4800 300
9600 600
19200 1200
38400 2400
76800 4800
153600 9600
166400 10400
307200 19200
614400 38400
Setting prohibited 76800
Setting prohibited 153600
Target Baud Rate
Synchronous Asynchronous
Mode Mode
4800 300
9600 600
19200 1200
38400 2400
76800 4800
153600 9600
166400 10400
307200 19200
614400 38400
Setting prohibited 76800
Setting prohibited 153600
CHAPTER 10 SERIAL INTERFACE FUNCTION
(a) When f = 32 MHz
XX
Actual Baud Rate
Synchronous Asynchronous
Mode Mode
4807.692 300.4808
9615.385 600.9615
19230.77 1201.923
38461.54 2403.846
76923.08 4807.692
153846.2 9615.385
166666.7 10416.67
307692.3 19230.77
615384.6 38461.54
−
71428.57
−
166666.7
(b) When f = 40 MHz
XX
Actual Baud Rate
Synchronous Asynchronous
Mode Mode
4882.813 305.1758
9615.385 600.9615
19230.77 1201.923
38461.54 2403.846
76923.08 4807.692
153846.2 9615.385
166666.7 10416.67
303030.3 18939.39
625000 39062.5
−
78125
−
156250
User's Manual U14492EJ5V0UD
/2) (1/2)
XX
BGCSm Bit PRSCMn
(m = 0, 1) Register Setting
Value (n = 1, 2)
3 208
3 104
3 52
3 26
3 13
2 13
1 24
1 13
0 13
0 7
0 3
BGCSm Bit PRSCMn
(m = 0, 1) Register Setting
Value (n = 1, 2)
3 256
3 130
3 65
2 65
1 65
0 65
0 60
0 33
0 16
0 8
0 4
Error
0.16
0.16
0.16
0.16
0.16
0.16
0.16
0.16
0.16
−6.99
8.51
Error
1.73
0.16
0.16
0.16
0.16
0.16
0.16
−1.36
1.73
1.73
1.73
473