AC4490 Hardware Integration Guide
Embedded Wireless Solutions Support Center:
http://ews-support.lairdtech.com
www.lairdtech.com/ramp
11
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Module
Pin
1x1
Pin
Type Signal Name
Function
17
17
I
CMD /Data
When logic Low, the transceiver interprets OEM Host data as
command data. When logic High, the transceiver interprets OEM
Host data as transmit data.
18
15
2
I
AD In
10-bit Analog Data Input
19
20
3
O
DA_Out
10-bit Analog Data Output
20
18
O
In_Range
When logic Low, a client is in range of a server on same Channel
and System ID. Always low on a server radio.
N/A
14
RF
RF Port
RF Interface
N/A
22
I
Reset
Active Low version of UP_RESET. If RESET is used, UP_RESET
should be left floating and if UP_RESET is used, RESET should be
left floating.
1.
Must be tied to VCC or GND if not used. Should never be permitted to float.
2.
If used, requires a shunt 0.1 μF capacitor at pin 15 followed by a series 1 k resistor.
3.
If used, requires a series 1 k resistor at pin 20 followed by a shunt 0.1 μF capacitor.
Notes: All I/O is 3.3 V TTL with exception of 5 V inputs on AC4490-200.
All inputs are weakly pulled High (10 k) and may be left floating during normal operation.
Minimum connections: VCC, VPA, GND, TXD, & RXD.
Signal direction depends on the transceiver.
Leave unused pins disconnected.
