Telit Wireless Solutions SE873 Series, Product User Manual

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SE873 Family Product User Guide Electrical Interface
1VV0301216
Rev.4
Page 31 of 69 2018-08-24
Table 8-1 SE873 Pin-out Function Table
Pin Name Type Function
Power
3, 19 V18 P Connect all pins to 1.8 V supply. See section 8.2 Power Supply.
Ground
2, 10,
20
GND G Connect all pins to ground.
RF Input
1 RF_IN I
Control Input
6 ON-OFF I On/Off. See section 8.3.1 ON-OFF (input) and SYSTEM-ON (output)
8 NRESET I
Reset (active low). See section 8.3.2 nReset.
This signal is not necessary for normal operation and may be brought
out to a test point or left unconnected.
9
BOOT-
SEL
I
Low during normal operation. BOOT-SEL may be pulled high to force
the module into the programmable state. BOOT-SEL is read prior to the
port select lines (GPIO 6 & 7). This pin should be left floating or brought
out to a test point.
Max: 1.8 V.
See section 7 Flash Upgradability.
13 GPIO6 I
GPIOs 6 & 7 are read to configure the primary serial port. only at power-
up and reset
After configuration, they may be used for UART or SPI signal lines
depending on the firmware options enabled.
See section
8.5 Serial I/O Ports - Configuration and Operation 12 GPIO7 I
Output
7
SYSTEM-
ON
O
Indicates the power state of the module. Also called Wakeup .
See 8.3.1 ON-OFF (input) and SYSTEM-ON (output)
5 GPIO8 O
External LNA control. High when the receiver is operating, and low
when in a low-power state. Also called
GNSS_ON .
See section 4.12
Internal LNA
11 TM O 1PPS time mark. See section 8.4.3
1PPS
Primary Port I/O See section 8.5 Serial I/O Ports - Configuration and Operation
15 TX O
Primary Serial Port Output. UART: TX, I
2
C: CLK, or SPI: Data Out
(MISO).
14 RX I
Primary Serial Port Input. UART: RX, I
2
C: DIO, or SPI: Data In
(MOSI).
13 GPIO6 I/O After configuration, may be used for UART: CTS or SPI: CLK.
12 GPIO7 I/O After configuration, may be used for UART: RTS or SPI: nCS.
Secondary Port I/O See section 8.5 Serial I/O Ports - Configuration and Operation
17 GPIO1 I/O Secondary Serial Port I/O. UART: Receive (RX1), I
2
C: Clock (SCL)
18 GPIO0 I/O Secondary Serial Port I/O. UART: Transmit(TX1), I
2
C: Data (SDA)
Reserved
4 Reserved R Reserved - Do not connect to any external circuit.
16 Reserved R Reserved - Do not connect to any external circuit.