RM024 – RAMP Wireless Module

Datasheet

Embedded Wireless Solutions Support Center:

http://ews-support.lairdtech.com

www.lairdtech.com/ramp

8

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SMT Pin

Pluggable Pin

Type

Signal Name

Functions

not be permanently pulled Low during

normal operation.

13

14

I

GIO_4

Generic Input

14

5

I

µP_Reset

Reset – Controlled by the RM024 for power-on

reset if left unconnected. After a stable power-on

reset, a logic low pulse resets 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 is always 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 Serial UART data to the OEM Host unless

this pin is Low.

18

12

O

CTS

Clear to Send – CTS is used for hardware flow

control indication to the OEM Host. CTS toggles

high when the Serial UART RX input buffer reaches

the CTS On threshold and remains high until the

buffer recedes below the CTS Off threshold.

19

18

GIO_8

Generic Input

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 20 k Ohm pull-up resistor and may be left floating during normal

operation.



Minimum connections: VCC, VPA, GND, TXD, and RXD.



Signal direction is with respect to the transceiver.



Leave unused pins disconnected.

1.4 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