USGlobalsat EB-5631RE - Manual (Page 3)

2012/7/30 - 3 -
Product Pin Description
PIN Number(s) Name Type Description Note
1 RF IN RF GPS antenna input
2,3,4,6,8,9,10,12
14,15,17,19,21,
22,23,24,26,28,
29,33,35,36
GND P Ground.
5 VBAT P
This is the battery backup power input for
the SRAM and RTC when main power is
removed.
7,32,34,16 NC NC
11 VCC P
This is the main power supply to the engine
board. (3.1Vdc to 3.5Vdc)
13 RESET I This input is low active.
18 GPIO I/O
User can use this I/O pin for special
functions. (For example, control LED)
1
20 TIMEMARK O One pulse per second output.(1PPS)
25 ON_OFF I
ON_OFF pin is used to command the
EB-5631RE to turn on or off
2
27 WAKE_UP O System power on, 1.8V output . 3
30 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.
31 RXD I
This is the main receive channel for
receiving software commands to the engine
board from SiRFDemo software or from user
written software.