RM024 Hardware Integration Guide
Version 3.1
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8
CONN-HIG_RAMP24
SMT
Pin
Pluggable Pin
Type Signal Name
Functions
on reset if left unconnected. After a stable
power-on reset, a logic Low pulse will reset
the transceiver.
15
11
I
CMD/Data When logic Low, the transceiver interprets
incoming OEM host data as command
data. When logic High, the transceiver
interprets OEM host data as transmit data.
16
15
O
In Range
When logic Low, the client is in range and
synchronized with a server. This will always
be Low on a server.
17
16
I
RTS
Request to Send. Floats high if left
unconnected. When enabled in EEPROM,
the module will not transmit data out the
Serial UART unless the pin is Low.
18
12
O
CTS
Clear to Send - CTS is used for hardware
flow control. CTS will toggle high when the
input buffer reaches the CTS On threshold
until the buffer recedes below CTS Off.
19
18
GIO_8
Generic Input
1
20
13
GIO_5
Reserved for future use. Do not connect.
21
4
GIO_6
Reserved for future use. Do not connect.
22
20
I
GIO_7
Analog to Digital Input
Tips:
All I/O directions are referenced to Vcc.
All inputs are weakly pulled High via a 20k Ohm pull-up resistor and may be left floating
during normal operation
Minimum connections: VCC, VPA, GND, TXD, & RXD
Signal direction is with respect to the transceiver
Unused pins should be left disconnected
Input Characteristics
Table 3: Input Characteristics
Signal Name
High Min.
High Max.
Low Min.
Low Max.
µP_Reset
0.8 v
Vcc
0 v
0.6 v
RTS
2.31 v
Vcc
0 v
.99 v
AD_In
N/A
Vcc
0 v
N/A
All other inputs
70% Vcc
Vcc
0 v
30% Vcc
Output Characteristics
Table 4: Output Characteristics
Signal Name
High Min.
High Max.
Low Min.
Low Max.
Sink Current
