Rikaline, 2 pin definition, 3 operating modes – Rikaline GPS-24/24A User Manual
Page 6
GPS Receiver Board
GPS-24 / 24A Operating Manual
Rikaline
Specifications subject to change without prior notice
Rikaline
International Corp.
14F, 171, ChengGong Rd, Sanchong CityTaipei 241, Taiwan
Tel: ++886 2 8973 1899 Fax: ++886 2 8973 1896 E-Mail:
Web: www.rikaline.com.tw
3.2 Pin Definition
PIN NAME
TYPE
DESCRIPTION
Remarks
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 (WAKE UP)
NU
Reserved, keep float
6
Reset
I
Low Active, keep float if not use *1
Will not effect hot, or cold start
7
VBAT
I
Backup Battery Input (1.2~2V)
8 GND
PWR
Ground
9
VCC
PWR +3.0~3.6V DC Power Input
10
GPIO(0)
I \ O
SW dependent functions
A1
RF GND
ANT
Antenna ground
A2 RF
IN
ANT Antenna
+
A3
RF GND
ANT
Antenna ground
D1
DSUMUX
I
Serial / DSU select
D2 DSUEN
I DSU
enable
D3
DSUBRE
I
DSU break enable
D4 DSUTX
O DSU
transmitter
D5 DSURX
I DSU
receiver
D6 DSUACT
O DSU
active
3.3 Operating Modes
3.3.1 GPIO(1) & (4)
It design as spare I\O. You may leave it disconnect of desire.
3.3.2 Reset:
It always requires reset when power-up. Max voltage is 2.0VDC
And will not effect cold start or hot start.
3.3.3 Debug Pins
All pins from D1 to D6 are for development purposes, not for end users except downloading new
software.
3.3.4 Developing Kit
Available at part no. GPS-24-SDK
3.4 Other Electrical Specification
Table 3-1 Absolute Maximum Ratings
Parameter Symbol
Min
Max
Units
Power Supply Voltage
VDD
-0.3
3.6
V
Input Pin Voltage
VIN
-0.3
3.3
V
Output Pin Voltage
VOUT
-0.3
3
V
Reset Pin Voltage
Vreset
-0.3
2.0
V
Storage Temperature
TSTG
-40
100
°C
Back-up Voltage
BAT
2.2
V
Table 3-2 Operating Conditions
Parameter Symbol
Min
Typ
Max
Units
Power Supply Voltage
VCC
3
3.3
3.6
V
Input Pin Voltage
VIN
2.7
3
3.3
V
Operating Temperature
TOPR
-40
85
°C
Operating Current ZX4120
ICC
27
mA