AT89C51ED2-RDTUM datasheet(54/137 Pages) ATMEL

tên linh kiện	AT89C51ED2-RDTUM

Giải thích chi tiết về linh kiện	8-bit Flash Microcontroller

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4235K–8051–05/08

AT89C51RD2/ED2

Table 14-5.

Example of Computed Value When X2=1, SMOD1=1, SPD=1

Table 14-6.

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 14-4.), but also for mode 0

for UART, thanks to the bit SRC located in BDRCON register (Table 14-13.)

14.5

UART Registers

Table 14-7.

SADEN Register

SADEN - Slave Address Mask Register for UART (B9h)

Reset Value = 0000 0000b

Table 14-8.

SADDR Register

SADDR - Slave Address Register for UART (A9h)

Reset Value = 0000 0000b

Baud Rates

OSC = 16. 384 MHz

OSC = 24MHz

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

1.23

Baud Rates

OSC = 16. 384 MHz

OSC = 24MHz

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

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