The Infrared Wireless Expert
ACT-IR8250P
Specification
8. Implementation Notice
Following signals lists the description of implementation notes when designed into board.
(1) Power supply
Pin Name
Comments
2
VCC
Digital power. Connect a 0.1uF bypass capacitor at this pin.
4 VSS
Digital ground
(2) Crystal Oscillator
Pin Name
Comments
6
XTIN
Input port for crystal oscillator. Only standard crystals can be connected.
5
XTOUT Output terminal of crystal oscillator
Both of these two pins connect a 20pF capacitor.
(3) Reset
Pin
I/O type
Name
Comments
7 I
nRST
Active low reset. This signal can be generated by the host, a RC
circuit or a RESET chip. It supports Brown-out feature.
(4) IrDA Transceiver
Pin
I/O type
Name
Comments
19
O
Ir_TX
IrDA Transmitter, high active. Connect to TXD pin of IrDA transceiver.
23 I
nIr_RX
IrDA Receiver, active low. Connect to RXD pin of IrDA transceiver.
9
O
IR_SD
Transceiver power control.
Please see the transceiver’s specification to get more detail information about transceiver.
Place IR8250P chip next to transceiver module as close as possible. And keep chip away from high
power consumption components.
© Copyright 2003-2005 ACTiSYS Corp. Page 13 of 25
Jan 28, 2005
Rev. 0.44
