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參數(shù)資料
| 型號： | C508 |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8-Bit CMOS Microcontroller |
| 中文描述： | 8位CMOS微控制器 |
| 文件頁數(shù)： | 43/93頁 |
| 文件大?。?/td> | 1204K |
| 代理商： | C508 |
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C508
Data Sheet
39
2000-08
Serial Interface
The serial port of the C508 is full duplex, meaning it can transmit and receive
simultaneously. It is also receive-buffered, meaning it can commence reception of a
second byte before a previously received byte has been read from the receive register
(however, if the first byte still hasn’t been read by the time reception of the second byte
is complete, one of the bytes will be lost). The serial port receive and transmit registers
are both accessed at special function register SBUF. Writing to SBUF loads the transmit
register, and reading SBUF accesses a physically separate receive register. The four
modes of USART is illustrated in
Table 8
.
Table 8
SM0
0
USART Operating Modes
Selected Operating Mode
Serial mode 0:
Serial data enters and exits through RxD; TxD outputs the shift clock
Serial mode 1:
8-bit USART, variable baud rate
10 bits are transmitted (through TxD) or received (at RxD)
Serial mode 2:
9-bit USART, fixed baud rate (
f
OSC
/8 or
f
OSC
/16)
11 bits are transmitted (through TxD) or received (at RxD)
Serial mode 3:
9-bit USART, variable baud rate
11 bits are transmitted (through TxD) or received (at RxD)
SM1
0
Shift register, fixed baud rate (
f
OSC
/3)
0
1
1
0
1
1
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|---|---|
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