at85c51snd3 ATMEL Corporation, at85c51snd3 Datasheet - Page 217

• Manufacturer Part Number: at85c51snd3
• Description: At85c51snd3 Single-chip Digital Audio Decoder - Encoder With Usb 2.0 Interface
• Manufacturer: ATMEL Corporation

7632D–MP3–01/07
Figure 109. Baud Rate Generator Block Diagram
Table 241. Baud Rate Generator Value (12x oversampling)
Note:
230400 115 53
460800 115 53
921600 115 106 1 0.016 120 83
115200 125 72
19200 125 12
38400 125 24
57600 125 36
Baud
Rate
9600
1.5M
1M
2M
4M
8M
CLOCK
SIO
125 6
1. This high frequency available through the clock generator requires PLL usage. It is
A
1
-
-
-
-
F
SIO
recommended to use it only for high baud rate that can not be achieved using oscilla-
tor frequency.
B
1
-
-
-
-
= 12 MHz
C
5
5
5
5
5
2 0.016 125 108 5
1 0.016 120 83
1
-
-
-
-
Pre-Divider
ε
Integer
0
0
0
0
0
0
-
-
-
-
%
CDIV7:0
SBRG0
110 99 125
125 9
125 18
125 27
125 54
112 84
A
-
-
-
-
F
SIO
B
-
-
-
-
÷
= 16 MHz
C
C
5
5
5
5
2 0.067 112 31
1 0.067 112 62
1
-
-
-
-
ε
0
0
0
0
0
0
0
-
-
-
-
%
124 5
124 10
124 20
124 30
124 60
120 83
115 69
110 99
A
-
-
-
F
SIO
B
Post-Divider
-
-
-
Fractional
ADIV7:0
= 20 MHz
SBRG1
C
7 0.007 125 3
7 0.007 125 6
7 0.007 125 12
7 0.007 125 18
7 0.007 125 36
5 0.067 125 72
1 0.111 115 53
1 0.111 115 53
1
1
-
-
-
ε
0
0
-
-
-
%
110 55
112 84
BDIV7:0
A
1
-
-
SBRG2
F
SIO
A
B
1
-
-
÷
= 24 MHz
B
C
5
5
5
5
5
5
2 0.016 217 10
1 0.016 118 87
1
1
1
-
-
ε
0
0
0
0
0
0
0
0
0
-
-
%
CLOCK
SBRG
124 5
124 10
217 5
110 15 142 0.033
110 49 232 0.004
110 49 116 0.004
120 12
120 18
115 23
115 46
115 92
F
A
SIO
To serial
Receiver &
Transmitter
= 120 MHz
B
C
7 0.007
7 0.007
1 0.007
1
1
1
1
1
1 0.007
8 0.002
ε
217
0
0
0
0
0
(1)
%