参数资料
型号: MC68HC705F8B
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 1.8 MHz, MICROCONTROLLER, PDIP56
封装: PLASTIC, SDIP-56
文件页数: 96/126页
文件大小: 1084K
代理商: MC68HC705F8B
MC68HC05F8
MOTOROLA
8-1
MANCHESTER ENCODER/DECODER
8
MANCHESTER ENCODER/DECODER
The built-in full duplex Manchester Coder (MANCD) performs data format conversion between
parallel NRZ and serial Manchester code. The bit rate is programmable, in four steps between 600
and 4800 baud when a 3.579MHz crystal is used.
Data are encoded to Manchester codes by writing to the Encode register before it is output to the
ENCOOUT pin. The data transfer format is 2 sync bits followed by 8 data bits and a trailing bit. Two
low level bits are used as a pause between byte transfers. Figure 8-3 shows the one byte data
transfer.
Manchester codes enter the MCU, LSB rst, at the DECOIN pin to the Decode register, gets
decoded before processing. The idle state of the DECOIN pin is a logic high. A Schmitt trigger is
built in at the DECOIN input to improve noise immunity.
8.1
Features
Four programmable bit rates
Buffered encode data register and decode data register
Encode data register empty ag and interrupt
Encoding complete ag
Decode data register full ag and interrupt
Decode overrun ag and interrupt
Bit format error detection
Bit rate error detection
Built-in front end Schmitt trigger in decoder
TPG
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For More Information On This Product,
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For More Information On This Product,
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相关代理商/技术参数
参数描述
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MC68HC705J1A 制造商:Freescale Semiconductor 功能描述:
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