LEA-6 / NEO-6 / MAX-6 - Hardware Integration Manual
UBX-14054794
Production Information
Appendix
Page 73 of 85
Pi
n
LEA-4A/LEA-4S
LEA-6A/LEA-6S
Remarks for Migration
Pin Name
Typical Assignment
Pin Name
Typical Assignment
1
TxD2
3.0 V out
SDA2
NC
2
RxD2
1.8 – 5.0 V
SCL2
NC
3
TxD1
3.0 V out
TxD1
Output
4
RxD1
1.8 – 5.0 V in
RxD1
Input
Leave open if not used. Max. 5 V
5
VDDIO
VCC
NC
Connect to VCC
Leave open for only LEA-6x design. Connect to
VCC for backward compatibility to LEA-5x.
6
VCC
2.70 – 3.30 V
VCC
2.70 – 3.60 V
Extended power supply range, higher peak supply
current.
7
GND
GND
GND
GND
No difference
8
VDD18OUT
1.8 V out
VCC_OUT
NC
Internally connected to VCC, if you have circuitry
connected to this pin, check if it withstands the
VCC voltage.
9
GPSMODE6
NC (GND or
VDD18OUT)
CFG_COM1
NC
10
RESET_N
ACTIVE LOW
RESET_N
NC
Input only, do not drive high. Internal pull up to
VCC.
11
V_BAT
1.50 – 3.6 V
V_BCKP
1.4 – 3.6 V
Wider voltage range but needs more current.
Check your backup supply, regarding the higher
consumption.
12
BOOT_INT
NC
Reserved
NC
Do not drive low.
13
GND
GND
GND
GND
No difference
14
GND
GND
GND
GND
No difference
15
GND
GND
GND
GND
No difference
16
RF_IN
RF_IN
RF_IN
RF_IN
No difference
17
GND
GND
GND
GND
No difference
18
VCC_RF
VCC – 0.1 V
VCC_RF
VCC – 0.1V
No difference
19
V_ANT
3.0 V – 5.0 V
V_ANT
2.7V -5.5V
wider range
20
AADET_N
NC (1.8 to 5.0 V)
AADET_N
NC
check resistor R5 in Active antenna supervisor
Figure 47
21
GPSMODE5
NC (GND or
VDD18OUT)
NC
NC
22
GPSMODE2
GPSMODE2
3
NC (GND or
VDD18OUT)
NC
NC
23
GPSMODE7
NC (1.8 to 5.0 V)
NC
NC
24
VDDUSB
3.0 –3.6V/ GND
VDDUSB
Connected to GND
or VDD_USB
Do not leave open. (VDD_USB is 3.3 V regulated
power supply from VBUS.)
25
USB_DM
VDDUSB I/O
USB_DM
NC
New serial termination resistors recommended: 22
26
USB_DP
VDDUSB I/O
USB_DP
NC
27
EXTINT0
NC (1.8 to 5.0 V)
EXTINT0
NC
Max. 5 V
28
TIMEPULSE
VDDIO level output
TIMEPULSE
Output
Table 31: Pin-out comparison LEA-4A/LEA-4S vs. LEA-6A/LEA-6S
B.4.2
Migration of LEA-4R designs to LEA-6R
LEA-6R module has been designed with backward compatibility in mind, but some incompatibilities were
unavoidable. These minor differences will, however, not be relevant for the majority of ANTARIS 4 designs.
Please check in your design the following points carefully to assure a safe migration:
For u-blox 6 the Input Voltage thresholds on the pins RxD1 and Extint0 have changed.
VCC_OUT is now VCC and not 1.8 V as on Antaris Modules.
Pin5 is now NC instead of VDDIO. All I/O Voltages are referenced to VCC.
Check your power supply requirements with the datasheet (for VCC and VBCKP), u-blox 6 has a higher
peak current and backup current than ANTARIS 4 modules
