MC68711E20CFNE3 Datasheet, PDF (114/242 Pages) –

Serial Communications Interface (SCI)
Table 7-1. Baud Rate Values
Crystal Frequency (MHz)
Prescaler Selects
Prescale
Divide
Baud
Set
Divide
4.00
4.9152 8.00 10.00 12.00
Bus Frequency (MHz)
SCP2 SCP1 SCP0 SCR2 SCR1 SCR0
1.00 1.23 2.00 2.50 3.00
16.00
4.00
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
1
0
0
0
0
0
1
1
0
0
0
1
0
0
0
0
0
1
0
1
0
0
0
1
1
0
0
0
0
1
1
1
1
1 62500 76800 125000 156250 187500 250000
1
2 31250 38400 62500 78125 93750 125000
1
4 15625 19200 31250 39063 46875 62500
1
8 7813 9600 15625 19531 23438 31250
1
16 3906 4800 7813 9766 11719 15625
1
32 1953 2400 3906 4883 5859 7813
1
64 977 1200 1953 2441 2930 3906
1
128 488 600 977 1221 1465 1953
0
0
1
0
0
0
0
0
1
0
0
1
0
0
1
0
1
0
0
0
1
0
1
1
0
0
1
1
0
0
0
0
1
1
0
1
0
0
1
1
1
0
0
0
1
1
1
1
3
1 20833 25600 41667 52083 62500 83333
3
2 10417 12800 20833 26042 31250 41667
3
4 5208 6400 10417 13021 15625 20833
3
8 2604 3200 5208 6510 7813 10417
3
16 1302 1600 2604 3255 3906 5208
3
32 651 800 1302 1628 1953 2604
3
64 326 400 651
814
977
1302
3
128 163 200 326
407
488
651
0
1
0
0
0
0
0
1
0
0
0
1
0
1
0
0
1
0
0
1
0
0
1
1
0
1
0
1
0
0
0
1
0
1
0
1
0
1
0
1
1
0
0
1
0
1
1
1
4
1 15625 19200 31250 39063 46875 62500
4
2 7813 9600 15625 19531 23438 31250
4
4 3906 4800 7813 9766 11719 15625
4
8 1953 2400 3906 4883 5859 7813
4
16 977 1200 1953 2441 2930 3906
4
32 488 600 977 1221 1465 1953
4
64 244 300 488
610
732
977
4
128 122 150 244
305
366
488
0
1
1
0
0
0
0
1
1
0
0
1
0
1
1
0
1
0
0
1
1
0
1
1
0
1
1
1
0
0
0
1
1
1
0
1
0
1
1
1
1
0
0
1
1
1
1
1
13
1 4808 5908 9615 12019 14423 19231
13
2 2404 2954 4808 6010 7212 9615
13
4 1202 1477 2404 3005 3606 4808
13
8
601 738 1202 1502 1803 2404
13
16 300 369 601
751
901
1202
13
32 150 185 300
376
451
601
13
64
75
92
150
188
225
300
13
128 38
46
75
94
113
150
1
0
0
0
0
0
1
0
0
0
0
1
1
0
0
0
1
0
1
0
0
0
1
1
1
0
0
1
0
0
1
0
0
1
0
1
1
0
0
1
1
0
1
0
0
1
1
1
39
1 1603 1969 3205 4006 4808 6410
39
2
801 985 1603 2003 2404 3205
39
4
401 492 801 1002 1202 1603
39
8
200 246 401
501
601
801
39
16 100 123 200
250
300
401
39
32
50
62
100
125
150
200
39
64
25
31
50
63
75
100
39
128 13
15
25
31
38
50
Shaded areas reflect standard baud rates.
On MC68HC(7)11E20 do not set SCP1 or SCP0 when SCP2 is 1.
M68HC11E Family Data Sheet, Rev. 5.1
114
Freescale Semiconductor