LEA-6 / NEO-6 / MAX-6 - Hardware Integration Manual
UBX-14054794
Production Information
Appendix
Page 72 of 85
B.4
Migration of LEA modules
B.4.1
Migration from LEA-4 to LEA-6
See also the migration Table in the u-blox5 Hardware Integration Manual.
For u-blox6 the Input Voltage thresholds on the pins RXD1 and EXTINT0 have changed.
The Safeboot functionality is inverted compared to Antaris receivers.
VCC_OUT is now VCC and not 1.8 V as on Antaris Modules.
Also check your power supply requirements with the datasheet (for VCC and VBCKP).
Pi
n
LEA-4H/LEA-4P/LEA-4T
LEA-6H/LEA-6T
Remarks for Migration
Pin Name
Typical Assignment
Pin Name
Typical Assignment
1
Reserved
VDDIO level I/O;
not connected
SDA2
NC
2
Reserved
VDDIO level I/O;
not connected
SCL2
NC
3
TXD1
VDDIO level I/O
TxD1
Output
4
RXD1
VDDIO level I/O
RxD1
Input
Leave open if not used.
5
VDDIO
1.65 – 3.60 V
NC
Connect to VCC
Can be left open, but connection to VCC is
recommended for compatibility reason. With LEA-
6H the I/O voltage is always VCC.
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
NC
VCC_OUT
NC
Internally connected to VCC, if you have circuitry
connected to this pin, check if it withstands the
VCC voltage.
9
Reserved
NC
Reserved
NC
10
RESET_N
1.8 V
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 – 0.1 V
No difference
19
V_ANT
3.0 V –5.0 V
V_ANT
2.7 V -5.5 V
wider range
20
AADET_N
NC
AADET_N
NC
check resistor R5 in Active antenna supervisor
Figure 47
21
EXTINT1
NC
NC
NC
22
Reserved
NC
NC
NC
23
Reserved
NC
NC
NC
24
VDDUSB
Connected to GND
or VDD_USB
VDDUSB
Connected to GND
or VDD_USB
Do not leave open. (VDD_USB is 3.3V regulated
power supply from VBUS.)
25
USB_DM
NC
USB_DM
NC
New serial termination resistors recommended: 22
26
USB_DP
NC
USB_DP
NC
27
EXTINT0
NC
EXTINT0
NC
28
TIMEPULSE
VDDIO level I/O
TIMEPULSE
Output
Table 30: Pin-out comparison LEA-4H/LEA-4P/LEA-4T vs. LEA-6H/LEA-6T
