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5.2 Description A5100-A Signals
Pin Symbol
1
GPIO2
2
VOUT
3
TX0/
SPI DO/
I2C CLK
4
RX0/
SPI DI/
I2C DIO
5
N.C.
6
ON_OFF
7
GND
8
GND
9
VANT
10
ANT_GND
11
ANT_IN
12
N.C.
13
N.C.
14
TM_GPIO5
15
N.C.
16
N.C.
17
GPIO6/
CTS/
SPI CLK
18
GPIO7/
RTS/
SPI CS
19
WAKEUP
20
VCC
V1.0-Mar-14
Function
Description
Input/Output
Leave open
Voltage output
Permanent VCC-0.1 V voltage output for up to 50mA current
max
Output
Serial output 0, NMEA out if configured for UART
SPI data out pin when module works in SPI mode
I2C clock pin when module works in host port I2C mode
Input
Serial input 0, NMEA in if configured for UART
SPI data in pin when module works in SPI mode
I2C data I/O pin when module works in host port I2C mode.
None
Leave open
Input
Connect to push-pull output! This is mandatory!
- Set to LOW by default
- Toggle to HIGH and back to LOW
- Connect it to WAKEUP pin for self-start mode
Power Supply
Ground (power supply)
Power Supply
Ground (power supply)
Antenna Supply
Power supply input for external active antenna – provide ac-
Voltage Input
cording voltage (up to 5.0 VDC) – switched internally
RF GND
Antenna Ground
Antenna Input
Antenna signal / Z=50 Ohm (antenna input) – must not exceed
30dB gain including cable loss
None
Leave open
None
Leave open
Output
Time Mark – 1PPS signal
None
Leave open
None
Leave open
Input
Configuration pin to run in UART mode (10k pull-up to
3.3V, e.g. to pin 3),
Leave open for SPI & host port I2C modes.
SPI clock pin when module works in SPI mode
Input
Configuration pin for communication mode. 10K to GND
for host port I2C mode; leave open for SPI & UART
modes.
SPI chip select pin when module works in SPI mode
Output
- Status of digital section, Push-Pull output
Low = OFF, KA (Keep Alive)-only, Hibernate, or Standby
mode
High = ON, operational mode
- Connect it to ON_OFF pin for self-start mode
Power Supply
3.0 – 3.6 VDC (power supply)
> for first start-up after power on
> to request a fix in SiRFaware
> to go into or wake up out of hibernate mode
User's Manual
TM
or PTF mode
Page 22 of 43
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