XECOM
(5)
XE900S-500
XE900S-500 PIN CONFIGURATION
GND
1
VCC
2
/TXD
3
/RXD
4
/CTS
5
/RTS
6
DIO3
7
DIO2
8
DIO1
9
DIO0
10
ADC1
11
ADC0
12
SIGNAL
PINS
DESCRIPTION
Ground
1
Common voltage reference for the XE900S-500.
VCC
2
3.3 Volt power for the XE900S-500.
/TXD
3
Transmit Data is the data input to the XE900S-500
/RXD
4
Received Data is the data output from the XE900S-500.
/CTS
5
Clear to Send provides hardware flow control from the XE900S-500. The XE900S-500
drives /CTS high to signal the host to temporarily stop the flow of data on the /TXD.
/RTS
6
Request to Send provides hardware flow control from the host system. The host system
drives /RTS high to signal the XE900S-500 to temporarily stop the flow of data on /RXD.
DIO3
7
DIO3 may be programmed as either a digital input or digital output. It connects directly to
the communications controller in the XE900S-500.
DIO2
8
DIO2 may be programmed as either a digital input or digital output. It connects directly to
the communications controller in the XE900S-500.
DIO1
9
DIO1 may be programmed as either a digital input or digital output. It connects directly to
the communications controller in the XE900S-500.
DIO0
10
DIO0 may be programmed as either a digital input or digital output. It connects directly to
the communications controller in the XE900S-500.
ADC1
11
Analog Input 1 to the XE900S-500 communications controller. ADC1 connects to an
internal 12-bit Analog to Digital Convertor. ADC0 may also be configured as a digital
input if no analog inputs are required.
ADC0
12
Analog Input 0 to the XE900S-500 communications controller. ADC0 connects to an
internal 12-bit Analog to Digital Convertor. ADC0 may also be configured as a digital
input if no analog inputs are required.
XE900S-500
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