ZE51/61-2.4 RF module User Guide
1VV0300868
Rev.4 – 23/06/201
1
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 24 of 54
Pin
Pin name
Pin type
Signal level
Function
J30
GND
Gnd
RF Ground connection for external antenna
J29
Ext_Antenna
RF
RF I/O connection to external antenna
J28
GND
Gnd
RF Ground connection for external antenna
J27 GND
Gnd
Ground
J26 GND
Gnd
Ground
J25
VDD
Power
Digital and Radio part power supply pin
J24 CTS
I
TTL
Clear
To
Send
J23
RESET
I
TTL
µC reset ( Active low with internal pull-up )
J22 RTS
O
TTL
Request
To
Send
J21
RXD
I
TTL
RxD UART – Serial Data Reception
J20 GND
Gnd
Ground
J19
TXD
O
TTL
TxD UART – Serial Data Transmission
J18
STAND_BY
I
TTL
Standby ( Active high with internal pull-down )
J17 GND
Gnd
Ground
J16 PROG
I
TTL
Signal for serial µC flashing ( Active high with internal
pull-down )
J15 GND
Gnd
Ground
J14 DEBUG_D
I/O
TTL
Debug
data.
J13 GND
Gnd
Ground
J12 GND
Gnd
Ground
J11 GND
Gnd
Ground
J10 DEBUG_C
I/O
TTL
Debug
clock
J9 RESERVED
-
-
-
J8 RESERVED
-
-
-
J7 IO7_A
I/O
analog
ADC -
Analog Input N°7 (Digital I/O capability)
J6 IO6_A
I/O
analog
ADC -
Analog Input N°6 (Digital I/O capability)
J5 IO5_A
I/O
analog
ADC -
Analog Input N°5 (Digital I/O capability)
J4 IO4_A
I/O
analog
ADC -
Analog Input N°4 (Digital I/O capability)
J3 IO3_A
I/O
analog
ADC -
Analog Input N°3 (Digital I/O capability)
J2
IO2_P
I/O
TTL
Digital I/O N°2 with 20mA sink/source capability
J1
IO1_P
I/O
TTL
Digital I/O N°1 with 20mA sink/source capability
NOTE: reserved pins must not be connected