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參數(shù)資料
| 型號(hào)： | XR16C854IQTR-F |
| 廠商： | Exar Corporation |
| 文件頁(yè)數(shù)： | 13/53頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC UART FIFO 128B QUAD 100QFP |
| 標(biāo)準(zhǔn)包裝： | 500 |
| 特點(diǎn)： | * |
| 通道數(shù)： | 4，QUART |
| FIFO's： | 128 字節(jié) |
| 規(guī)程： | RS232，RS485 |
| 電源電壓： | 2.97 V ~ 5.5 V |
| 帶自動(dòng)流量控制功能： | 是 |
| 帶IrDA 編碼器/解碼器： | 是 |
| 帶故障啟動(dòng)位檢測(cè)功能： | 是 |
| 帶調(diào)制解調(diào)器控制功能： | 是 |
| 帶CMOS： | 是 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 100-BQFP |
| 供應(yīng)商設(shè)備封裝： | 100-QFP（14x20） |
| 包裝： | 帶卷 (TR) |
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XR16C854/854D
20
2.97V TO 5.5V QUAD UART WITH 128-BYTE FIFO
REV. 3.1.0
The infrared encoder and decoder are enabled by setting MCR register bit-6 to a ‘1’. When the infrared feature
is enabled, the transmit data output, TX, idles at logic zero level. Likewise, the RX input assumes an idle level
of logic zero from a reset and power up, see Figure 12.
Typically, the wireless infrared decoder receives the input pulse from the infrared sensing diode on the RX pin.
Each time it senses a light pulse, it returns a logic 1 to the data bit stream. However, this is not true with some
infrared modules on the market which indicate a logic 0 by a light pulse. So the 854 has a provision to invert
the input polarity to accomodate this. In this case user can enable FCTR bit-2 to invert the input signal.
2.19
Sleep Mode with Auto Wake-Up
The 854 supports low voltage system designs, hence, a sleep mode is included to reduce its power
consumption when the chip is not actively used.
All of these conditions must be satisfied for the 854 to enter sleep mode:
s
no interrupts pending for all four channels of the 854 (ISR bit-0 = 1)
s
sleep mode of all four channels are enabled (IER bit-4 = 1)
s
modem inputs are not toggling (MSR bits 0-3 = 0)
s
RX input pins are idling at a logic 1
The 854 stops its crystal oscillator to conserve power in the sleep mode. User can check the XTAL2 pin for no
clock output as an indication that the device has entered the sleep mode.
FIGURE 12. INFRARED TRANSMIT DATA ENCODING AND RECEIVE DATA DECODING
Character
Data Bits
S
ta
rt
S
to
p
0
1
Bit Time
1/16 Clock Delay
IRdecoder-1
RX Data
Receive
IR Pulse
(RX pin)
C h a ra cte r
D a ta B its
S
ta
rt
S
to
p
0
1
T X D a ta
T ra n sm it
IR P u lse
(T X P in )
B it T im e
1 /2 B it T im e
3 /1 6 B it T im e
IrE n co d e r-1
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XR16C854IV | 制造商:Exar Corporation 功能描述: |
| XR16C854IV-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 |
| XR16C854IV-F | 制造商:Exar Corporation 功能描述:IC QUAD UART 2MBPS 5.5V 64-LQFP |
| XR16C854IVTR-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 |
| XR16C864 | 制造商:EXAR 制造商全稱:EXAR 功能描述:2.97V TO 5.5V QUAD UART WITH 128-BYTE FIFO |
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