CD2481 Datasheet, PDF (63/222 Pages) Intel Corporation – Programmable Four-Channel Communications Controller

Programmable Four-Channel Communications Controller — CD2481
Table 4. Clock Source Select (Sheet 2 of 2)
ClkSel2
1
1
1
ClkSel1
1
1
1
ClkSel0
0
1
1
Select
External clock
Reserved
Receive clock
Note: All divisors are in hexadecimal.
Table 5. Bit Rate Constants, CLK = 25 MHz
Bit Rate
50
110
150
300
600
1200
2481
3600
4800
7200
9600
19200
38400
56000
64000
76800
Divisor
f3
6e
50
a2
50
a2
50
d8
a2
6c
50
a2
50
37
30
28
Clock
clk4
clk4
clk4
clk3
clk3
clk2
clk2
clk1
clk1
clk1
clk1
clk0
clk0
clk0
clk0
clk0
Error
0.06%
0.02%
0.47%
0.15%
0.47%
0.15%
0.47%
0.01%
0.15%
0.45%
0.47%
0.15%
0.47%
0.35%
0.35%
0.76%
Note: All divisors are in hexadecimal.
Table 6. Bit Rate Constants, CLK = 30 MHz (Sheet 1 of 2)
Bit Rate
Divisor
Clock
Error
110
84
150
61
300
c2
600
61
1200
c2
2481
61
3600
40
4800
c2
7200
81
9600
61
clk4
0.13%
clk4
0.35%
clk3
0.16%
clk3
0.35%
clk2
0.16%
clk2
0.35%
clk2
0.16%
clk1
0.16%
clk1
0.16%
clk1
0.35%
(RCOR)
(TCOR)
Datasheet
63