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參數(shù)資料
| 型號： | ST16C550IP40 |
| 廠商： | EXAR CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | UART WITH 16-BYTE FIFO’s |
| 中文描述： | 1 CHANNEL(S), 1.5M bps, SERIAL COMM CONTROLLER, PDIP40 |
| 封裝： | DIP-40 |
| 文件頁數(shù)： | 16/35頁 |
| 文件大?。?/td> | 227K |
| 代理商： | ST16C550IP40 |
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ST16C550
16
Rev. 4.30
Interrupt Status Register (ISR)
The ST16C550 provides four levels of prioritized inter-
rupts to minimize external software interaction. The
Interrupt Status Register (ISR) provides the user with six
interrupt status bits. Performing a read cycle on the ISR
will provide the user with the highest pending interrupt
level to be serviced. No other interrupts are acknowl-
edged until the pending interrupt is serviced. Whenever
the interrupt status register is read, the interrupt status
is cleared. However it should be noted that only the
current pending interrupt is cleared by the read. A lower
level interrupt may be seen after rereading the interrupt
status bits. The Interrupt Source Table 5 (below) shows
the data values (bit 0-3) for the four prioritized interrupt
levels and the interrupt sources associated with each of
these interrupt levels:
Table 5, INTERRUPT SOURCE TABLE
Priority
Level
[ISR]
Bit-3 Bit-2 Bit-1 Bit-0
Source of the interrupt
X
1
2
2
3
4
0
0
0
1
0
0
0
1
1
1
0
0
0
1
0
0
1
0
1
0
0
0
0
0
No interrupt pending
LSR (Receiver Line Status Register)
RXRDY (Received Data Ready)
RXRDY (Receive Data time out)
TXRDY ( Transmitter Holding Register Empty)
MSR (Modem Status Register)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| ST16C550IP40-F | 功能描述:UART 接口集成電路 SINGLE UART W/16 BYTE FIFO RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
| ST16C550IQ48 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
| ST16C550IQ48-F | 功能描述:UART 接口集成電路 2.97V-5.5V 16B FIFO temp -45 to 85C;UART RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
| ST16C550IQ48TR-F | 功能描述:UART 接口集成電路 UART RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
| ST16C552 | 制造商:EXAR 制造商全稱:EXAR 功能描述:DUAL UART WITH 16-BYTE FIFO AND PARALLEL PRINTER PORT |
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