EB-N700 User’s Manual
EverMore Technology Inc.
2F, No.7, R&D Road 1, Science-Based Industrial Park, Hsinchu, Taiwan, 300, R.O.C.
http://www.emt.com.tw
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3.3 EB-N700 Serial Interface
Communication to the EB-N700 is provided via a serial interface. A 10-pin 1.27mm whole connector is
used. The pin out is shown in Table 6.
Pin 6 (Reset) is the active-low reset input. The EB-N700 always requires a reset at power-up, or it will
not start properly. An optional onboard reset circuit can be provided. A reset forces the EB-N700
processor to reboot, but will not influence other parameters such as hot or cold start.
Pin 1 (GPIO [4]) and pin 10 (GPIO [0]) are spare pins that can be used e.g. to control power modes, to
indicate EB-N700 status, or to force a cold start. They can be left unconnected if desired.
I/O voltage level is set to 2.7V.
Table 6 Pin list of the serial Interface
Pin Name Type
Description
1
GPIO [4]
I/O
GPS Status
2
NC (MODE)
NU
Reserved, keep float
3
NMEA TX
I/O
NMEA Serial Data Output
4
NMEA RX
I/O
NMEA Serial Data Input
5
NC (WAKEUP)
NU
Reserved, keep float
6
Reset
I
Low Active, keep float if not use *1
7
VBAT
I
Backup Battery Input (1.2~2V)
8 GND PWR
Ground
9
VDD
PWR
+3.0~3.6V DC Power Input
10
GPIO [0]
I/O
SW dependent functions
*1: Max voltage is DC 2V.
In the case of NMEA(TX & RX), the rate at which data is transmitted is 9600 Baud using printable 8-bit
ASCII characters. Transmission begins with a start bit (logical zero), followed by eight data bits and a
stop bit (logical one) added at the end. No parity bits are used.
LVTTL
Level
