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參數(shù)資料
| 型號(hào)： | LZ85202 |
| 廠商： | Sharp Corporation |
| 英文描述： | IrDA Control Host Controller with USB Interface(帶USB接口的IrDA控制主控制器) |
| 中文描述： | 紅外線控制主機(jī)控制器與USB接口（帶的USB接口的紅外線控制主控制器） |
| 文件頁數(shù)： | 16/48頁 |
| 文件大?。?/td> | 219K |
| 代理商： | LZ85202 |
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LZ85202
10
IrDA Control Host Controller with USB Interface User
’
s Guide
Interface with Infrared Transceiver (Front-end, FE)
The HC and the infrared transceiver (Sharp P/N: GP2W2001YK) must be interfaced as
described in Figure 9. Signal lines: FERESET, FECNT, I RRx1, and IRTx.
IRTx is a signal line for data transmission, IRRx1 for data receipt. FERESET is provided
to reset the infrared transceiver
’
s receiver sensitivity so that the transceiver can receive a
very weak optical signal even after receiving a strong optical signal. FECNT is a control
pinout to shut down the transceiver, so that the power consumption of the overall sub-
system can be minimized while not in use. For the transmission signal line, (IRTx -TXD),
a 1.5 k
resistor is recommended for the current level adjustment, and a 330 pF capaci-
tance in parallel as a speed up capacitor. Note that a 56
resistor is required on the AV
CC
pinout of the transceiver for the current level adjustment.
Please also refer to the transceiver data sheets as well as its appendix document
for further instructions. These documents are available from Sharp web site at
http://www.sharp.co.jp/ecg/irda/irda-e.html. For the detailed interface information, please
refer to the circuit diagram in the
‘
Appendix
’
section. When DC BIAS mode is NOT sup-
ported, see Figure 21, if the DC BIAS mode is supported, see Figure 22.
Figure 9. Interface Between HC and Infrared Transceiver
RESET
SD
V
O
TXD
FERESET
FECNT
IRRx1
IRTx
LZ85202-9
GP2W2001YK
LZ85202
HC
INFRARED
TRANSCEIVER
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