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