MAX-M10S-Integration manual
Appendix
A Migration
u-blox is committed to ensuring that products in the same form factor are backwards compatible
over several technology generations. This section describes important differences to consider when
migrating from MAX-M8 modules to MAX-M10S module. A design review with u-blox support team
is recommended to verify proper use of the product features. Table 32 presents the key hardware-
related changes between MAX-M10S and MAX-M8 modules.
Feature Change Action needed / Remarks
VCC, V_IO
The V_IO voltage range is selected with
the VIO_SEL pin.
V_IO supply voltage cannot be higher
than VCC + 0.3 V
For designs with 1.8 V supply at V_IO, switch off V_IO supply
100 ms before VCC when transitioning to hardware backup
mode. Alternatively, put the receiver in software standby mode
by sending the UBX-RXM-PMREQ message before switching off
V_IO and VCC.
Check the minimum and maximum VCC and V_IO ramp
requirements in the MAX-M10S data sheet [1].
VCC and V_IO
supply range
MAX-M10S: 1.76 V - 1.98 V, 2.7 V - 3.6 V
MAX-M8C: 1.65 V - 3.6 V
HW change is required when migrating from a MAX-M8C
design that uses less than 2.7 V VCC and V_IO supply because
VIO_SEL (pin 15) needs to be connected to GND in MAX-M10S
and the voltage range for 1.8 V designs is different.
V_BCKP supply
range
MAX-M10S: 1.65 V - 3.6 V
MAX-M8Q/C/W: 1.4 V - 3.6 V
HW change is required when migrating from a MAX-M8 design
that uses less than 1.65 V V_BCKP supply.
Backup current
The hardware and software backup
current in MAX-M10S is higher than in
MAX-M8Q/W modules.
The backup current in MAX-M10S is
significantly lower than in MAX-M8C.
Check the backup battery capacity if it is still suitable for the
target design requirements.
Pin-out 1:1 pin-out mapping with MAX-M8Q/C
modules, but not with MAX-M8W.
HW change is required for MAX-M8W designs that use V_ANT
(pin 13) to supply an active antenna.
LNA-SAW
RF front-end
MAX-M10S includes a Band 13 notch
filter, LNA and an SAW filter on the RF
path which allows the use of passive
antenna and offers improved out-of-
band immunity.
External BOM savings are possible if the same components have
been added externally on the RF path of the MAX-M8 design.
Use the internal LNA of the receiver in bypass mode when an
active antenna is used.
3
An external SAW filter can be added in front of the RF_IN pin in
MAX-M10S, which allows an SAW-LNA-SAW RF front-end circuit
for improving out-of-band immunity against RF interference
from other sources. This is especially useful when MAX-M10S is
used in cellular applications.
Absolute max.
RF input power
MAX-M10S: 0 dBm
MAX-M8 modules: +15 dBm
HW change: add external SAW filter in front of MAX-M10S for
cellular applications.
SAFEBOOT_N,
TIMEPULSE
The SAFEBOOT_N pin is internally
connected to TIMEPULSE pin through
a 1 kΩ series resistor.
Do not drive the TIMEPULSE pin low at startup because it will
put the receiver in safeboot mode.
RESET_N Resetting the receiver clears the BBR
contents.
MAX-M8: time information cleared
MAX-M10S: time information and
GNSS orbit data cleared
TTFF after resetting MAX-M10S with the RESET_N pin is
similar to performing a cold start.
3
The internal LNA mode of the receiver can be configured to low gain and bypass modes because the MAX-M10S module
has an LNA on the RF path. This allows flexible optimization of the receiver performance and power consumption with
respect to the selected RF front-end/antenna. The default internal LNA mode on MAX-M10S is set to low gain.
UBX-20053088 - R03
Appendix Page 79 of 89
C1-Public
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