Datasheet

75
4337K–USB–04/08
AT89C5130A/31A-M
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 15-4.), but also for mode 0
for UART, thanks to the bit SRC located in BDRCON register (Table 15-4.)
15.4 UART Registers
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
F
OSC
= 16.384 MHz F
OSC
= 24 MHz
BRL Error (%) BRL Error (%)
115200 247 1.23 243 0.16
57600 238 1.23 230 0.16
38400 229 1.23 217 0.16
28800 220 1.23 204 0.16
19200 203 0.63 178 0.16
9600 149 0.31 100 0.16
4800 43 1.23 - -
Baud Rates
F
OSC
= 16.384 MHz F
OSC
= 24 MHz
BRL Error (%) BRL Error (%)
4800 247 1.23 243 0.16
2400 238 1.23 230 0.16
1200 220 1.23 202 3.55
600 185 0.16 152 0.16
7 6 5 4 3 2 1 0
– – – – – – – –
7 6 5 4 3 2 1 0
– – – – – – – –
7 6 5 4 3 2 1 0
– – – – – – – –