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Module Pin out definition
Pin
Pin Name
Type
1
PWR Ground
GND
2
RFIN
3
GND
PWR Ground
4
GND
PWR Ground
5
NRESET
6
LED_ONOFF
7
PWR Backup battery input (2.5–3.3V)
BATTERY
8
NSLEEP
9
VCC_IN
PWR 3.3 ~ 5.5 VDC supply input
10
GND
PWR Ground
11
RXDB
12
TXDA
13
RXDA
14
BOOT_SEL
15
GND
PWR Ground
16 TIMER_SYNC
17
AMP_INTR
18 FREQ_XFER
19
TIMEMARK
20
PWR Ground
GND
Ordering Information
Model No.
GR-86-A
GR-86-B
I
RF signal input
I
Reset, active low. Keep floating if not used.
O
1 HZ High/Low pulse output in tracking mode
I
Power down module, low active
I
Serial Data input B
O
Serial Data Output A
I
Serial Data Input A
I
Pull high for firmware download mode. Keep NC if not used.
I
Reserve for feature
I
Reserve for feature
I
Reserve for feature
1 µsec pulse per second when tracking
O
Chipset
GSC3f
GSC3f
Function description
RF interface output voltage (V)
RF antenna power 2.8 VDC from GR-86
RF antenna power supply from VCC_IN
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