EVA-M8M - Hardware Integration Manual
2.12
Migration considerations
EVA-M8M series is the successor of the EVA-7M. u-blox is committed to ensuring that products in the same
form factor are backwards compatible over several technology generations. Utmost care has been taken to
ensure there is no negative impact on function or performance and to make u-blox M8 modules as fully
compatible as possible with u-blox 7 versions. No limitations of the standard features have resulted. If using
BeiDou, check the bandwidth of the external RF components and the antenna. For power consumption
information, see the
EVA-M8M Data Sheet
[1].
In contrast to EVA-7M, the EVA-M8M series provides flash firmware update capabilities when connecting an
external SQI flash memory device. In addition, the SQI Flash memory allows for the usage of data logging and
increases AssistNow Offline and Autonomous performances. More information and recommendations for using
an external SQI flash see section 2.2.5. It is highly advisable that customers consider a design review with the u-
blox support team to ensure the compatibility of key functionalities.
For an overall description of the module software operation, see the
u-blox M8 Receiver Description
Including Protocol Specification
[2].
For migration, see the
u-blox 7 to u-blox M8 Software Migration Guide
2.12.1
C88-M8M - Evaluating EVA-M8M on existing NEO-xM sockets
The C88-M8M GNSS application board is designed for easier evaluation and design-in of u-blox EVA-M8M
modules in existing NEO-xM modules based products. The C88-M8M series integrates the EVA-M8M GNSS
modules into a NEO form factor adaptor board (i.e. with the same dimensions and pinout as the NEO-6M,
NEO-7M and NEO-M8M). The C88-M8M application board allows straightforward integration of the u-blox
EVA-M8M modules in customers’ existing end products based on the u-blox NEO GNSS modules. It enables fast
verification of the EVA-M8M functionalities and performances before the design-in.
Schematic of C88-M8M is available upon request.
Pi
n
NEO-6M
C88-M8M
Pin Name
Typical Assignment
Pin Name
Typical Assignment
Remarks for Migration
1
RESERVED
SAFEBOOT_N
(Leave open)
RESERVED
SAFEBOOT_N
(Leave open)
No difference
2
SS_N
SPI Slave Select
D_SEL
Leave open. If
connected to GND
SPI interface
available on Pins
18-21.
Different functions. Only compatible if this
pin is left open!
3
TIMEPULSE
Time pulse (1PPS)
TIMEPULSE
Time pulse (1PPS)
No difference
4
EXTINT0
External interrupt pin
EXTINT0
External interrupt
pin
No difference
5
USB_DM
USB data
USB_DM
USB Data
No difference
6
USB_DP
USB data
USB_DP
USB Data
No difference
7
VDD_USB
USB supply
VDD_USB
USB supply
No difference
8
RESERVED
Pin 8 and 9 must be
connected together.
RESET_N
Reset input
If pin 8 is connected to pin 9 on C88-M8M, the
device always runs. With NEO-6Q, if Reset input
is used, it implements the 3k3 resistor from pin
8 to pin 9. This also works with NEO-7N. If used
with NEO-7N, do not populate the pull-up
resistor.
9
VCC_RF
Can be used for active
antenna or external LNA
supply.
VCC_RF
Can be used for
active antenna or
external LNA
supply.
No difference
10 GND
GND
GND
GND
No difference
UBX-14006179 - R01
Advance Information
Design-in
Page 22 of 45
