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The Infrared Wireless Expert ACT-IR220VACF
Nov. 12, 2002
Rev. 1.1.1
Pin Assignment and Description
Symbol Pin No. I/O
Type Descriptions
NC 1 & 8
No connect.
RXDO 2 Output
Receiving Data Output. It is active when infrared signals
come from RXDI pin. It depends on RXDO-PCTRL pin to
control active level. It can be connected to the UART
interface of micro controller.
RESET 3 Input
Reset chip signal. Low active. Pulling this pin Low for 200ns,
it will reset the baud rate to 9.6kbps.
MODE 4 Input
Changing mode signal. Low active. Pulling this pin Low for
200ns, it will change the chip baud rate to next speed. There
are 5 baud rates supported by IR220VACF.
TXDI 5 Input
Transmitting Data Input. The data that comes from TXDI pin
will be translated to infrared signals and sent to TXDO pin. It
depends on TXDI-PCTRL pin to control active level. It can
be connected to UART interface of micro controller.
TXDI-PCTRL 6 Input
When TXDI-PCTRL is “LOW”, the TXDI will be HIGH active.
When TXDI-PCTRL is “HIGH”, TXDI will be change to LOW
active.
GND 7 Power
Ground.
XTAL 9 & 10
Crystal input clock, 3.6864 MHz nominal. Input for external
clock.
RXDI 11 Input
Infrared signals input. This pin is connected to the Infrared
signals that comes from receiving pin of transceiver module
RXDO-PCTRL 12 Input
When RXDO-PCTRL is “LOW”, the RXDO will be HIGH
active, when RXDO-PCTRL is “HIGH”, RXDO will be
change to LOW active.
TXDO 13 Output
Infrared signals output.This pin is connected and sends
infrared signals to transmitting pin of transceiver module.
VCC 14
Power supply.
