USGlobalsat EB-5635RE - Manual (Page 3)

2012/7/30 - 3 -
Product Pin Description
PIN Number(s) Name Type Description Note
1,2,7,8,14,15,16,
17
NC
Reverse PIN, just NC
3 TIMEMARK O One pulse per second output.(1PPS)
4 GPIO I/O
User can use this I/O pin for special
functions. (For example, control LED)
1
5 WAKE_UP O System power on, 1.8V output. 3
6 ON_OFF I
ON_OFF pin is used to command the
EB-5365RE to turn on or off
2
9 VCC_RF P Supply Antenna Bias voltage (V=VCC)
10,12,13,24 GND P Ground.
11 RF IN RF GPS antenna input
18 DR_I2C_DIO I/O
DR I2C Interface.
Support MEMS Sensor , 1.8V Level
4
19 DR_I2C_CLK I/O
20 TXD O
This is the main transmits channel for
outputting navigation and measurement
data to user’s navigation software or user
written software. Output TTL level.
21 RXD I
This is the main receive channel for
receiving software commands to the engine
board from SiRFDemo software or from user
written software.
1
22 VBAT P
This is the battery backup power input for
the SRAM and RTC when main power is
removed.
23 VCC P
This is the main power supply to the engine
board. (3.1Vdc to 3.5Vdc)