NEO-8Q / NEO-M8 - Hardware integration manual
UBX-15029985 - Production information
Migration to u-blox 8 / M8 modules
Page 18 of 19
C1-Public
Pi
n
NEO-6
NEO-8Q and NEO-M8 series
Remarks for migration
Pin name
Typical
assignment
Pin name
Typical
assignment
11 RF_IN
GNSS signal
input
RF_IN
GNSS signal input No difference
12 GND
GND
GND
GND
No difference
13 GND
GND
GND
GND
No difference
14 MOSI/
CFG_COM0
SPI MOSI /
configuration
pin.
Leave open if
not used.
LNA_EN
Used to turn an
optional external
LNA on and off
LNA_EN (Active Antenna Control) can be used to
turn an optional external LNA on and off.
-> Different functions, no SPI MOSI and
configuration pins with NEO-8Q / NEO-M8. If not
used as default configuration, it must be set
using software command!
It is not possible to migrate from NEO-6 to NEO-
8Q / NEO-M8 if NEO-6 pin 14 is connected to
GND. In this case, migrate to NEO-M8M!
15 MISO/
CFG_COM1
SPI MISO /
configuration
pin. Leave
open if not
used.
RESERVED
Leave open
16 CFG_GPS0/
SCK
Power mode
configuration
pin / SPI
clock. Leave
open if not
used.
RESERVED
Leave open
17 RESERVED
Leave open
RESERVED
Leave open
No difference
18 SDA
DDC data
SDA
DDC data / SPI
CS_N
No difference for DDC. If pin 2 low = SPI chip
select
19 SCL
DDC clock
SCL
DDC clock / SPI
SCK
No difference for DDC. If pin 2 low = SPI clock
20 TxD
Serial port
TXD
UART_TX / SPI
MISO
No difference for UART. If pin 2 low = SPI MISO
21 RxD
Serial port
RXD
UART_RX / SPI
MOSI
No difference for UART. If pin 2 low = SPI MOSI
22 V_BCKP
Backup
supply
voltage
V_BCKP
Backup supply
voltage
Check current in Data sheet.
If in u-blox 6 module this was connected to GND,
you can do the same in u-blox M8/8.
23 VCC
Supply
voltage
NEO-6Q /
M/P/V/T:
2.7 – 3.6 V
NEO-6G:
1.75 – 1.95 V
VCC
Supply voltage
NEO-8Q /
NEO-M8N/Q/J:
2.7 – 3.6 V
NEO-M8M:
1.65 – 3.6 V
No difference for NEO-8Q / NEO-M8J/N/Q
Extended supply voltage range for NEO-M8M
24 GND
GND
GND
GND
No difference
Table 4: Pin-out comparison NEO-6 vs. NEO-8Q and NEO-M8 series
Make sure that the RF path (antenna and filtering) matches that of the GNSS constellations used.
3.3
Software migration
☞
For an overall description of the module software operation, see the u-blox 8 / u-blox M8 Receiver
Description including Protocol Specification [4].
☞
For migration, see the u-blox M8 FW SPG3.01 Migration Guide [9].
