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參數(shù)資料
| 型號： | XR17C154IV |
| 廠商： | EXAR CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | Tools, Heatgun; Leaded Process Compatible:No; Peak Reflow Compatible (260 C):No RoHS Compliant: No |
| 中文描述： | 4 CHANNEL(S), 6.25M bps, SERIAL COMM CONTROLLER, PQFP144 |
| 封裝： | 20 X 20 MM, 1.40 MM HEIGHT, TQFP-144 |
| 文件頁數(shù)： | 30/62頁 |
| 文件大?。?/td> | 721K |
| 代理商： | XR17C154IV |
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XR17C154
5V PCI BUS QUAD UART
á
REV. 1.3.0
30
4.5
Each UART in the 154 includes the infrared encoder and decoder compatible to the IrDA (Infrared Data
Association) version 1.0. The input pin ENIR conveniently activates all 8 UART channels to start up in the
infrared mode. The ENIR pin is sampled when the RST# input is de-asserted. This global control pin enables
the MCR bit-6 function in every UART channel register. After power up or a reset, the software can overwrite
MCR bit-6 if so desired. ENIR and MCR bit-6 also disable its receiver while the transmitter is sending data.
This prevents the echoed data from going to the receiver. The global activation ENIR pin prevents the infrared
emitter from turning on and drawing large amount of current while the system is starting up. When the infrared
feature is enabled, the transmit data outputs, TX[3:0], would idle LOW. Likewise, the RX [3:0] inputs assume
an idling condition when it is LOW.
The infrared encoder sends out a 3/16 of a bit wide pulse for each “0” bit in the transmit data stream. This
signal encoding reduces the on-time of the infrared LED, hence reduces the power consumption. See
Figure 15
below.
The infrared decoder receives the input pulse from the infrared sensing diode on RX pin. Each time the
decoder senses a light pulse, it returns a logic zero to the data bit stream. The RX input signal may be inverted
prior delivered to the input of the decoder via internal register setting. This option supports active low instead of
normal active high pulse from some infrared modules on the market.
Infrared Mode
F
IGURE
15. I
NFRARED
T
RANSMIT
D
ATA
E
NCODING
AND
R
ECEIVE
D
ATA
D
ECODING
Character
Data Bits
S
S
0
0
0
0
0
1
1
1
1
1
Bit Time
1/16 Clock Delay
IRdecoder-1
RX Data
Receive
IR Pulse
(RX pin)
Character
Data Bits
S
S
0
0
0
0
0
1
1
1
1
1
TX Data
Transmit
IR Pulse
(TX Pin)
Bit Time
1/2 Bit Time
3/16 Bit Time
IrEncoder-1
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XR17C154IV-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 |
| XR17C154IVTR-F | 制造商:Exar Corporation 功能描述:UART 4-CH 64Byte FIFO 5V 144-Pin LQFP T/R 制造商:Exar Corporation 功能描述:XR17C154IVTR-F |
| XR17C158 | 制造商:EXAR 制造商全稱:EXAR 功能描述:5V PCI BUS OCTAL UART |
| XR17C158CV | 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 |
| XR17C158CV-0A-EVB | 功能描述:UART 接口集成電路 Supports C158 144 ld TQFP, PCI Interface 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 |
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