Hardware Migration Lea-6T -> Lea-M8T; Software Migration - u-blox LEA-M8S Hardware Integration Manual

3.3 Hardware migration LEA-6T -> LEA-M8T
LEA-6T
Pin
Pin Name Typical Assignment
1 SDA DDC Data
2 SCL DDC Clock
3 TxD Serial Port
4 RxD Serial Port
5
NC Not Connected
6
VCC Supply voltage
7
GND Ground (digital)
8 VCC_OUT Output voltage
9 nd
TIMEPULSE2 2
10 RESET_N External Reset
11 V_BCKP Backup voltage supply
12 Safeboot_N Safeboot_N
13 GND Ground
14 GND Ground
15 GND Ground
16 RF_IN GNSS signal input
17 GND Ground
18
VCC_RF Output Voltage RF section
19 V_ANT Antenna Bias voltage
20
AADET_N Active Antenna Detect
21 Reserved Not Connected
22 Reserved Not Connected
23 Reserved Not Connected
24
VDD_USB USB Supply
25
USB_DM USB Data
26
USB_DP USB Data
27
EXTINT0 External Interrupt Pin
28 TIMEPULSE1 Timepulse (1PPS)
Table 6: Pin-out comparison LEA-6T vs. LEA-M8T

3.4 Software migration

For overall description of the module software operation, see the u-blox M8 Receiver Description
Including Protocol Specification [3].
All features requiring a flash on LEA-6N are not supported on LEA-M8S. (AssistNow offline / save config)
UBX-13003140 - R07
Pin Name
SDA
SCL
TxD
RxD
D_SEL
VCC
GND
VCC_OUT
Not Connected
Timepulse
RESET_N
V_BCKP
Safeboot_N/
TIMEPULSE2
GND
GND
GND
RF_IN
GND
VCC_RF
V_ANT
EXTINT1/AADET_N
Reserved
Reserved
Reserved
VDD_USB
USB_DM
USB_DP
EXTINT0
TIMEPULSE1
LEA-M8T
Typical Assignment
DDC Data
DDC Clock
Serial Port
Serial Port
D_SEL =1(or open)
Supply voltage
Ground (digital)
Output voltage
Reserved
External Reset
Backup voltage supply
Safeboot_N /Timepulse 2
Ground
Ground
Ground
GNSS signal input
Ground
Output Voltage RF
section
Antenna Bias voltage
External Interrupt Pin/
Active Antenna Detect
Not Connected
Not Connected
Not Connected
USB Supply
USB Data
USB Data
External Interrupt Pin
Timepulse (1PPS)
Production Information
LEA-M8S / LEA-M8T - Hardware Integration Manual
Remarks for Migration
No difference
No difference
No difference
No difference
Do not drive low
No difference
No difference
No difference
Time Pulse 2 is now
available on pin 12
(Safeboot_N / Time Pulse 2)
No difference
If this was connected to GND
on u-blox 6 module, OK to do
the same on u-blox M8.
Must not be held LO during
start-up.
No difference
No difference
No difference
No difference
No difference
No difference
No difference
No difference
No difference
No difference
No difference
No difference
No difference
No difference
No difference
Migration to u-blox M8 modules
Page 19 of 31