u-blox LEA-5 Series Hardware Manual page 62

LEA-4H/LEA-4P/LEA-4T
Pin Name Typical Assignment
6 VCC
2.70 – 3.30V
7 GND GND
8 VDD18OUT NC
9 Reserved
NC
10 RESET_N 1.8V
11 V_BAT 1.50 – 3.6V
12 BOOT_INT
NC
13 GND GND
14 GND GND
15 GND GND
16 RF_IN RF_IN
17 GND GND
18 VCC_RF
VCC - –.1V
19 V_ANT
3.0V –5.0V
20 AADET_N
NC
21 EXTINT1 NC
22 Reserved NC
23 Reserved NC
Connected to GND
24 VDDUSB
or VDD_USB
25 USB_DM NC
26 USB_DP NC
27 EXTINT0 NC
28 TIMEPULSE VDDIO level I/O
: Pins to be checked carefully; NC: Not connected
Table 16: Pin-out comparison LEA-4H/LEA-4P/LEA-4T vs. LEA-5H/LEA-5T
LEA-4A/LEA-4S
Pin Name Typical Assignment
1 TxD2
3.0V out
2 RxD2 1.8 - –.0V
3 TxD1 3.0V out
4 RxD1 1.8 - –.0V in
5 VDDIO VCC
6 VCC 2.70 – 3.30V
7 GND GND
8 VDD18OUT 1.8V out
NC (GND or
9 GPSMODE6
VDD18OUT)
10 RESET_N ACTIVE LOW
11 V_BAT 1.50 – 3.6V
GPS.G5-MS5-09027-A2
LEA-5, NEO-5, TIM-5H - Hardware Integration Manual
LEA-5H/LEA-5T
Pin Name Typical Assignment
VCC
2.70 – 3.60V
GND GND
VCC_OUT NC
Reserved
NC
RESET_N NC
V_BCKP 1.4 – 3.6V
Reserved
NC
GND GND
GND GND
GND GND
RF_IN RF_IN
GND GND
VCC_RF
VCC - –.1V
V_ANT
2.7V -5.5V
AADET_N
NC
NC NC
NC NC
NC NC
Connected to GND
VDDUSB
or VDD_USB
USB_DM NC
USB_DP NC
EXTINT0 NC
TIMEPULSE Output
LEA-5A/LEA-5S
Pin Name Typical Assignment
SDA2
NC
SCL2 NC
TxD1 Output
RxD1 Input
NC Connect to VCC
VCC 2.70 – 3.60V
GND GND
VCC_OUT NC
CFG_COM1 NC
RESET_N NC
V_BCKP 1.4 – 3.6V
Released
Remarks for Migration
Extended power supply range, higher peak supply
current.
No difference
Internally connected to VCC, if you have circuitry
connected to this pin, check if it withstands the
VCC voltage.
Input only, do not drive high. Internal pull up to
VCC.
Wider voltage range but needs more current.
Check your backup supply, regarding the higher
consumption.
do not drive low.
No difference
No difference
No difference
No difference
No difference
No difference
No difference
Do not leave open. (VDD_USB is 3.3V regulated
power supply from VBUS.)
No difference
No difference
Remarks for Migration
Leave open if not used.
Can be left open, but connection to VCC is
recommended for compatibility reason (e.g LEA-
5Q).
Extended power supply range, higher peak supply
current.
No difference
Internally connected to VCC, if you have circuitry
connected to this pin, check if it withstands the
VCC voltage.
Input only, do not drive high. Internal pull up to
VCC.
Wider voltage range but needs more current.
Check your backup supply, regarding the higher
consumption.
Appendix
Page 62 of 68