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9XTend? ? OEM ? RF ? Module ?‐? Product ? Manual ? v2.x4x ? [2007.01.04]
1.3. Pin Signals
Figure ? 1 ‐ 01. XTend ? OEM ? RF ? Module ? Pin ? Numbers ??
Chapter ? 1 ?‐? 9XTend ? OEM ? RF ? Module
Table ? 1 ‐ 03.
Pin ? Signal ? Descriptions
(Low ‐ asserted ? signals ? distinguished ? with ? a ? horizontal ? line ? over ? signal ? name.)
Pin
Number
1
2
3
4
5
6
7
Mnemonic
GND
VCC
GPO2 /
RX LED
TX_PWR
DI
DO
SHDN
I/O
-
I
O
O
I
O
I
High Impedance
during Shutdown
-
-
yes
yes
yes
yes
no
Must
Connect
yes
yes
-
-
yes
-
yes
Function
Ground
Power: 2.8 - 5.5 VDC
General Purpose Output 2: <Default (CD=2)> Pin is driven low. Refer to the CD
Command [p24] for other configuration options.
RX LED: Pin is driven high during RF data reception; otherwise, the pin is driven
low. Refer to the CD Command [p24] to enable.
Transmit_Power: Pin pulses low during RF transmission; otherwise, the pin is
driven high to indicate power is on and the module is not in Sleep or Shutdown
Mode.
Data In: Serial data entering the module (from the UART host). Refer to the Serial
Communications [p9] section for more information.
Data Out: Serial Data exiting the module (to the UART host). Refer to the Serial
Communications [p9] section for more information.
Shutdown: Pin is driven high during operation and low during Shutdown.
Shutdown enables the lowest power mode (~5 μA) available to the module. Refer
to the Shutdown Mode [p14] section for more information.
General Purpose Input 2: reserved for future use
8
GPI2 / SLEEP
I
yes
-
SLEEP: By default, SLEEP is not used. To configure this pin to enable Sleep
Modes, refer to the Sleep Mode [p15], SM Command [p37] & PW Command [p32]
sections.
General Purpose Output 1: reserved for future use
9
GPO1 / CTS /
RS-485 TX_EN
O
yes
-
CTS (Clear-to-Send): <Default (CS=0)> When pin is driven low, the UART host
is permitted to send serial data to the module. Refer to the Serial Communications
[p9] & CS Command [p25] sections for more information.
RS-485 Transmit Enable: To configure this pin to enable RS-485 half and full-
duplex communications. Refer to the Serial Communications [p9] & CS Command
[p25] sections.
General Purpose Input 1: reserved for future use
10
11
GPI1 / RTS /
CMD
CONFIG /
RSSI
I
I*
O*
yes
no
no
-
-
-
RTS (Request-to-Send): By default, is not used. To configure this pin to
regulate the flow of serial data exiting the module, refer to the Serial
Communications [p9] & RT Command [p36] sections.
CMD (Command): By default, CMD is not used. To configure this pin to enable
binary command programming, refer to the Binary Commands [p18] & RT
Command [p36] sections.
Configuration: Pin can be used as a backup method for entering Command
Mode during power-up. Refer to the Command Mode [p17] section for more
information.
Receive Signal Strength Indicator: By default, pin is used as an RSSI PWM
output after at the conclusion of the power-up sequence. Refer to the RP
Command [p35] for more information.
12-20
reserved / do not connect
* ?? RF ? module ? has ? 10K ? Ω ? internal ? pull ‐ up ? resistor
Note: When integrating the module with a Host PC board, all lines not used should be left disconnected (floating).
? ? 2007 ? MaxStream, ? Inc.
????? 6
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