AT83C5111 datasheet(29/86 Pages) ATMEL

部件名	AT83C5111

功能描述	Low Pin Count 8-bit Microcontroller with A/D Converter

PDF	86 Pages

Scroll/Zoom	100%

制造商	ATMEL [ATMEL Corporation]

网页	http://www.atmel.com

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29 / 86 page

AT8xC5111

4190A–8051–11/02

for UART:

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 (See Figure 10), but also for mode

0 for both UARTs, thanks to the bit SRC located in BDRCON register (see Table 27).

Baud Rates

XTAL = 16.384 MHz

XTAL = 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

1.23

Baud Rates

FOSC = 16.384 MHz

FOSC = 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

Baud_Rate =

2SMOD1 x 2X2 x F

XTAL

2 x 2 x 6(1-SPD) x 16 x [256 - (BRL)]

(BRL) = 256 -

SMOD1 x 2X2 x F

XTAL

2 x 2 x 6

(1-SPD) x 16 x Baud_Rate

AT83C5111 数据表(PDF) 29 Page - ATMEL Corporation

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