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參數(shù)資料
| 型號： | XR17D152 |
| 廠商： | Exar Corporation |
| 英文描述： | UNIVERSAL (3.3V AND 5V) PCI BUS DUAL UART |
| 中文描述： | 通用（3.3V和5V）PCI總線的雙UART |
| 文件頁數(shù)： | 32/68頁 |
| 文件大?。?/td> | 772K |
| 代理商： | XR17D152 |
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XR17D152
UNIVERSAL (3.3V AND 5V) PCI BUS DUAL UART
á
REV. 1.2.0
32
5.5
Each UART in the D152 includes the infrared encoder and decoder compatible to the IrDA (Infrared Data
Association) version 1.0. The input pin ENIR conveniently activates both UART channels to start up in the
infrared mode. 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[1:0], would
idle at logic zero level. Likewise, the RX[1:0] inputs assume an idle level of logic zero.
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 17
below.
The infrared decoder receives the input pulse from the infrared sensing diode on RX pin. Each time it 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
17. 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
TX Data
Transmit
IR Pulse
(TX Pin)
Bit Time
1/2 Bit Time
3/16 Bit Time
IrEncoder-1
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)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| XR17D152CM | UNIVERSAL (3.3V AND 5V) PCI BUS DUAL UART |
| XR17D152IM | UNIVERSAL (3.3V AND 5V) PCI BUS DUAL UART |
| XR17D158IV | UNIVERSAL (3.3V AND 5V) PCI BUS OCTAL UART |
| XR17D158 | UNIVERSAL (3.3V AND 5V) PCI BUS OCTAL UART |
| XR17D158CV | UNIVERSAL (3.3V AND 5V) PCI BUS OCTAL UART |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XR17D152CM | 制造商:EXAR 制造商全稱:EXAR 功能描述:UNIVERSAL (3.3V AND 5V) PCI BUS DUAL UART |
| XR17D152CM-0A-EVB | 功能描述:界面開發(fā)工具 Supports D152 100 ld TQFP, PCI Interface RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
| XR17D152CM-F | 功能描述:UART 接口集成電路 3.3V-5V 64B FIFO temp 0C to 70C; 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 |
| XR17D152CMTR-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 |
| XR17D152IM | 制造商:EXAR 制造商全稱:EXAR 功能描述:UNIVERSAL (3.3V AND 5V) PCI BUS DUAL UART |
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