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| 型號(hào)： | MC68328PV |
| 廠商： | MOTOROLA INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | MICROCONTROLLER, PQFP144 |
| 封裝： | PLASTIC, TQFP-144 |
| 文件頁(yè)數(shù)： | 47/198頁(yè) |
| 文件大小： | 551K |
| 代理商： | MC68328PV |
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Universal Asynchronous Receiver/Transmitter
MOTOROLA
MC68328 USER’S MANUAL 12/9/97
11-13
UART
11
PRELIMINARY
11.4.3 UART Receiver Register
The UART receiver (URX) register contains the status of the receiver. The high byte of this
register resets to 0x00. This register contains random data until the first character is
received. The CHARACTER STATUS field is updated and valid with each data character.
Status and data must be read as a 16-bit word.
FIFO FULL—FIFO Full
This read-only bit indicates that the receiver FIFO is full and may generate an overrun.
0 = Receive FIFO not full (no interrupt posted).
1 = Receive FIFO full (interrupt posted).
FIFO HALF—FIFO Half
This read-only bit indicates that the receiver FIFO is more than half full.
0 = Receive FIFO less than half full (no interrupt posted).
1 = Receive FIFO more than half full (interrupt posted).
DATA READY—Data Ready
This read-only bit indicates that at least one byte is present in the receive FIFO.
0 = No data in receive FIFO.
1 = Data in receive FIFO.
OVRUN—FIFO Overrun
When high, this read-only bit indicates that the receiver overwrote data in the FIFO. The
character with this bit set is valid, but at least one previous character was lost. Under normal
circumstances, this bit should never be set. It indicates that your software is not keeping up
with the incoming data rate. This bit is updated and valid for each received character.
0 = No FIFO overrun.
1 = FIFO overrun detected.
URX
BIT
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
GROUP
FIFO STATUS
—
CHARACTER STATUS
DATA
FIELD
FIFO
FULL
FIFO
HALF
DATA
READY
0
OVRUN
FRAME
ERROR
BREAK
PARITY
ERROR
RX DATA
R/W
RRRRRRRR
R
RESET
0x0xxxx
ADDR
0x(FF)FFF904
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| MC68330FE25 | 32-BIT, 25.16 MHz, MICROPROCESSOR, PQFP132 |
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| MC68332ACFV25 | 32-BIT, 25 MHz, MICROCONTROLLER, PQFP144 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC68328UM | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Integrated Portable System Processor-DragonBall |
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| MC68330CFE8V | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Integrated CPU32 Processor |
| MC68330CFG16 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Integrated CPU32 Processor |
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