Ublox MAX-7C-0, Manual

Page: 37 / 52

MAX-7 / NEO-7 - Hardware Integration Manual
UBX-13003704 - R09 Production Information Migration
to u-blox-7 modules
Page 37 of 52
6.2.3 Hardware migration MAX-6 -> MAX-7
Pin
MAX-6 MAX-7 Remarks for Migration
Pin Name Typical Assignment Pin Name Typical Assignment
1 GND GND GND GND No difference
2 TxD Serial Port TxD Serial Port No difference
3 RxD Serial Port RxD Serial Port No difference
4 TIMEPULSE Time pulse (1PPS) TIMEPULSE Time pulse (1PPS) No difference
5 EXTINT0
External Interrupt
pin
EXTINT0
External Interrupt
pin
No difference
6 V_BCKP
Backup supply
voltage
V_BCKP
Backup supply
voltage
If on u-blox 6 module this was connected to GND,
no problem to do the same in u-blox 7.
(MAX-7C: Higher backup current, see 2.5.3.1
Single Crystal)
7 VCC_IO
IO supply voltage
Input must be
always supplied.
Usually connect to
VCC pin 8
VCC_IO
IO supply voltage
Input must be
always supplied.
Usually connect to
VCC pin 8
No difference
8 VCC
Power supply of
module
MAX-6G 1.75 –
2.0V
MAX-6Q/C: 2.7 –
3.6V
VCC
Power supply of
module
MAX-7C: 1.65 –
3.6V
MAX-7Q: 2.7 –
3.6V
9 VRESET connect to pin 8 RESET_N Reset input
With MAX-6, if Reset input is used, it implements
the 3k3 resistor from pin 9 to pin 8. This also
works with MAX-7. If used with MAX-7, do not
populate the pull-up resistor.
10 GND GND GND GND No difference
11 RF_IN
Matched RF-Input,
DC block inside.
RF_IN
Matched RF-Input,
DC block inside.
No difference
12 GND GND GND GND No difference
13 ANT_ON
Active antenna or
ext. LNA control
pin in power save
mode.
ANT_ON pin
voltage level: MAX-
6 -> VCC_RF (pull-
up)
ANT_ON
Active antenna or
ext. LNA control
pin in power save
mode.
ANT_ON pin
voltage level: MAX-
7 -> VCC_IO (push-
pull)
On MAX-6, ANT_ON pin voltage level is with
respect to VCC_RF, on MAX-7 to VCC_IO
(only relevant when VCC_IO does not share the
same supply with VCC)
14 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
15 RESERVED Leave open.
RESERVED
(MAX-7W:
V_ANT )
Leave open. No difference
16 SDA DDC Data SDA DDC Data No difference
17 SCL DDC Clock SCL DDC Clock No difference
18 RESERVED Leave open. RESERVED Leave open. No difference
Table 14: Pin-out comparison MAX-6 vs. MAX-7