at89c5131 ATMEL Corporation, at89c5131 Datasheet - Page 72

• Manufacturer Part Number: at89c5131
• Description: 8-bit Flash Microcontroller With Full Speed Usb Device At89c5131
• Manufacturer: ATMEL Corporation

UART Registers
4136C–USB–04/05
Example of computed value when X2 = 1, SMOD1 = 1, SPD = 1
Example of computed value when X2 = 0, SMOD1 = 0, SPD = 0
The baud rate generator can be used for mode 1 or 3 (refer to Figure 34.), but also for
mode 0 for UART, thanks to the bit SRC located in BDRCON register (Table 60.)
SADEN - Slave Address Mask Register for UART (B9h)
Reset Value = 0000 0000b
SADDR - Slave Address Register for UART (A9h)
Reset Value = 0000 0000b
SBUF - Serial Buffer Register for UART (99h)
Reset Value = XXXX XXXXb
Baud Rates
Baud Rates
7
–
7
–
7
–
115200
57600
38400
28800
19200
9600
4800
4800
2400
1200
600
6
–
6
–
6
–
BRL
BRL
247
238
229
220
203
149
247
238
220
185
43
F
F
5
–
5
–
5
–
OSCA
OSCA
= 16.384 MHz
= 16.384 MHz
4
–
4
–
4
–
Error (%)
Error (%)
1.23
1.23
1.23
1.23
0.63
0.31
1.23
1.23
1.23
1.23
0.16
3
–
3
–
3
–
BRL
BRL
2
–
2
–
2
–
243
230
217
204
178
100
243
230
202
152
-
F
F
OSCA
OSCA
AT89C5131
= 24 MHz
= 24 MHz
1
–
1
–
1
–
Error (%)
Error (%)
0.16
0.16
0.16
0.16
0.16
0.16
0.16
0.16
3.55
0.16
-
0
–
0
–
0
–
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