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參數(shù)資料
| 型號： | MQ80C154-16P883 |
| 廠商： | TEMIC SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, 16 MHz, MICROCONTROLLER, CQFP44 |
| 文件頁數(shù)： | 60/142頁 |
| 文件大?。?/td> | 61013K |
| 代理商： | MQ80C154-16P883 |
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152
ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET]
8285E–AVR–02/2013
Figure 20-1. USART block diagram
(1).
Note:
1. Refer to Figure 1-1 on page 2 and Figure 14-5 on page 66 for USART pin placement.
The dashed boxes in the block diagram separate the three main parts of the USART (listed from the top): Clock
Generator, Transmitter and Receiver. Control Registers are shared by all units. The Clock Generation logic con-
sists of synchronization logic for external clock input used by synchronous slave operation, and the baud rate
generator. The XCK (Transfer Clock) pin is only used by synchronous transfer mode. The Transmitter consists of a
single write buffer, a serial Shift Register, Parity Generator and Control logic for handling different serial frame for-
mats. The write buffer allows a continuous transfer of data without any delay between frames. The Receiver is the
most complex part of the USART module due to its clock and data recovery units. The recovery units are used for
asynchronous data reception. In addition to the recovery units, the Receiver includes a Parity Checker, Control
logic, a Shift Register and a two level receive buffer (UDRn). The Receiver supports the same frame formats as the
Transmitter, and can detect Frame Error, Data OverRun and Parity Errors.
20.2.1
AVR USART vs. AVR UART – Compatibility
The USART is fully compatible with the AVR UART regarding:
Bit locations inside all USART Registers
Baud Rate Generation
Transmitter Operation
Transmit Buffer Functionality
Receiver Operation
PARITY
GENERATOR
UBRR[H:L]
UDR (Transmit)
UCSRA
UCSRB
UCSRC
BAUD RATE GENERATOR
TRANSMIT SHIFT REGISTER
RECEIVE SHIFT REGISTER
RxD
TxD
PIN
CONTROL
UDR (Receive)
PIN
CONTROL
XCK
DATA
RECOVERY
CLOCK
RECOVERY
PIN
CONTROL
TX
CONTROL
RX
CONTROL
PARITY
CHECKER
DATA
BUS
OSC
SYNC LOGIC
Clock Generator
Transmitter
Receiver
相關PDF資料 |
PDF描述 |
|---|---|
| MQ83C154XXX-L16/883D | 8-BIT, MROM, 16 MHz, MICROCONTROLLER, CQFP44 |
| MQ83C154CXXX-25/883R | 8-BIT, MROM, 25 MHz, MICROCONTROLLER, CQFP44 |
| MR80C154-L16/883R | 8-BIT, 16 MHz, MICROCONTROLLER, CQCC44 |
| MQ83C154CXXX-L16P883R | 8-BIT, MROM, 16 MHz, MICROCONTROLLER, CQFP44 |
| MR83C154CXXX-20P883R | 8-BIT, MROM, 20 MHz, MICROCONTROLLER, CQCC44 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MQ80C154-20 | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:CMOS 0 to 36 MHz Single Chip 8-bit Microcontroller |
| MQ80C154-25 | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:CMOS 0 to 36 MHz Single Chip 8-bit Microcontroller |
| MQ80C154-30 | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:CMOS 0 to 36 MHz Single Chip 8-bit Microcontroller |
| MQ80C154-36 | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:CMOS 0 to 36 MHz Single Chip 8-bit Microcontroller |
| MQ80C154-L16 | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:CMOS 0 to 36 MHz Single Chip 8-bit Microcontroller |
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