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AT83SND2CMP3B Datasheet(PDF) 174 Page - ATMEL Corporation

Part # AT83SND2CMP3B
Description  Single-Chip Flash Microcontroller with MP3 Decoder with Full Audio Interface
PDF  241 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT83SND2CMP3B Datasheet(HTML) 174 Page - ATMEL Corporation

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174
4341F–MP3–03/06
AT8xC51SND2C/MP3B
Notes:
1. These frequencies are achieved in X1 mode, F
PER = FOSC ÷ 2.
2. These frequencies are achieved in X2 mode, FPER = FOSC.
20.4.5
Baud Rate Selection (Mode 2)
In mode 2, the baud rate can only be programmed to 2 fixed values: 1/16 or 1/32 of the periph-
eral clock frequency.
As shown in Figure 20-14 the selection is done using SMOD1 bit in PCON register.
Figure 20-15 gives the baud rate calculation formula depending on the selection.
Figure 20-14. Baud Rate Generator Selection (Mode 2)
Table 20-2.
Internal Baud Rate Generator Value
Baud
Rate
F
PER = 6 MHz
(1)
F
PER = 8 MHz
(1)
F
PER = 10 MHz
(1)
SPD
SMOD
1
BRL
Error
%SPD
SMOD
1
BRL
Error
%SPD
SMOD
1
BRL
Error
%
115200
-
----
---
----
57600
-
-
-
-
1
1
247
3.55
1
1
245
1.36
38400
1
1
246
2.34
1
1
243
0.16
1
1
240
1.73
19200
1
1
236
2.34
1
1
230
0.16
1
1
223
1.36
9600
1
1
217
0.16
1
1
204
0.16
1
1
191
0.16
4800
1
1
178
0.16
1
1
152
0.16
1
1
126
0.16
Baud
Rate
FPER = 12 MHz
(2)
FPER = 16 MHz
(2)
FPER = 20 MHz
(2)
SPD
SMOD
1
BRL
Error
%SPD
SMOD
1
BRL
Error
%SPD
SMOD
1
BRL
Error
%
115200
-
-
-
-
1
1
247
3.55
1
1
245
1.36
57600
1
1
243
0.16
1
1
239
2.12
1
1
234
1.36
38400
1
1
236
2.34
1
1
230
0.16
1
1
223
1.36
19200
1
1
217
0.16
1
1
204
0.16
1
1
191
0.16
9600
1
1
178
0.16
1
1
152
0.16
1
1
126
0.16
4800
1
1
100
0.16
1
1
48
0.16
1
0
126
0.16
0
1
SMOD1
PCON.7
PER
CLOCK
÷ 2
÷ 16
To Serial Port



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