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參數(shù)資料
| 型號： | MC68HC05C9ECP |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP40 |
| 封裝： | PLASTIC, DIP-40 |
| 文件頁數(shù)： | 51/106頁 |
| 文件大?。?/td> | 659K |
| 代理商： | MC68HC05C9ECP |
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MC68HC05C9E Advance Information Data Sheet, Rev. 0.1
Freescale Semiconductor
49
Chapter 9
Serial Communications Interface (SCI)
9.1 Introduction
This section describes the on-chip asynchronous serial communications interface (SCI). The SCI allows
full-duplex, asynchronous, RS232 or RS422 serial communication between the microcontroller unit
(MCU) and remote devices, including other MCUs. The transmitter and receiver of the SCI operate
independently, although they use the same baud rate generator.
9.2 Features
Features of the SCI include:
Standard mark/space non-return-to-zero format
Full-duplex operation
32 programmable baud rates
Programmable 8-bit or 9-bit character length
Separately enabled transmitter and receiver
Two receiver wakeup methods:
–
Idle line wakeup
–
Address mark wakeup
Interrupt-driven operation capability with five interrupt flags:
–
Transmitter data register empty
–
Transmission complete
–
Transmission data register full
–
Receiver overrun
–
Idle receiver input
Receiver framing error detection
1/16 bit-time noise detection
NOTE
The serial communications data register (SCI SCDR) is controlled by the
internal R/W signal. It is the transmit data register when written to and the
receive data register when read.
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