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| 型號(hào)： | TL16C550CI |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Asynchronous Communications Element With Autoflow Control(帶自動(dòng)數(shù)據(jù)流控制異步通信器件) |
| 中文描述： | 異步通信元件與Autoflow技術(shù)控制（帶自動(dòng)數(shù)據(jù)流控制異步通信器件） |
| 文件頁(yè)數(shù)： | 28/39頁(yè) |
| 文件大小： | 556K |
| 代理商： | TL16C550CI |
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TL16C550C, TL16C550CI
ASYNCHRONOUS COMMUNICATIONS ELEMENT
WITH AUTOFLOW CONTROL
SLLS177F
–
MARCH 1994
–
REVISED MARCH 2001
28
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
interrupt identification register (IIR) (continued)
Table 5. Interrupt Control Functions
INTERRUPT
IDENTIFICATION REGISTER
BIT 3
BIT 2
PRIORITY
LEVEL
INTERRUPT TYPE
INTERRUPT SOURCE
INTERRUPT RESET
METHOD
BIT 1
BIT 0
0
0
0
1
None
None
None
None
0
1
1
0
1
Receiver line status
Overrun error, parity error,
framing error, or break interrupt
Read the line status register
0
1
0
0
2
Received data available
Receiver data available in the
TL16C450 mode or trigger level
reached in the FIFO mode
Read the receiver buffer register
1
1
0
0
2
Character time-out
indication
No
removed from or input to the
receiver FIFO during the last four
character times, and there is at
least one character in it during
this time
characters
have
been
Read the receiver buffer register
0
0
1
0
3
Transmitter holding
register empty
Transmitter
empty
holding
register
Read the interrupt identification
register (if source of interrupt) or
writing into the transmitter
holding register
0
0
0
0
4
Modem status
Clear to send, data set ready,
ring indicator, or data carrier
detect
Read the modem status register
line control register (LCR)
The system programmer controls the format of the asynchronous data communication exchange through the
LCR. In addition, the programmer is able to retrieve, inspect, and modify the contents of the LCR; this eliminates
the need for separate storage of the line characteristics in system memory. The contents of this register are
summarized in Table 3 and described in the following bulleted list.
Bits 0 and 1: These two bits specify the number of bits in each transmitted or received serial character.
These bits are encoded as shown in Table 6.
Table 6. Serial Character Word Length
BIT 1
BIT 0
WORD LENGTH
0
0
5 bits
0
1
6 bits
1
0
7 bits
1
1
8 bits
Bit 2: This bit specifies either one, one and one-half, or two stop bits in each transmitted character. When
bit 2 is cleared, one stop bit is generated in the data. When bit 2 is set, the number of stop bits generated
is dependent on the word length selected with bits 0 and 1. The receiver clocks only the first stop bit
regardless of the number of stop bits selected. The number of stop bits generated in relation to word length
and bit 2 are shown in Table 7.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TL16C550CIFN | 功能描述:UART 接口集成電路 Sngl UART w/16-Byte FIFOs & Aut Flw Ctrl 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 |
| TL16C550CIFNG4 | 功能描述:UART 接口集成電路 Sgl 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 |
| TL16C550CIFNR | 功能描述:UART 接口集成電路 Sgl UART w/ 16-Byte FIFOs 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 |
| TL16C550CIFNRG4 | 功能描述:UART 接口集成電路 Sgl UART w/ 16-Byte FIFOs 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 |
| TL16C550CIN | 制造商:TI 制造商全稱:Texas Instruments 功能描述:ASYNCHRONOUS COMMUNICATIONS ELEMENT WITH AUTOFLOW CONTROL |
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