u-blox NEO-7M-0 - Hardware Migration Issues

MAX-7 / NEO-7 / LEA-7 - Hardware Integration Manual
GPS.G7-HW-11006-1 Migration to u-blox-7 modules
Page 38 of 55
4.2 Hardware migration
4.2.1 Hardware compatibility:
Table 13 provides a summary of important hardware migration issues to note.
NEO-7 MAX-7 LEA-7
Fully compatible VCC, RF_IN, GND, USB pins, TxD, RxD,
VCC_RF, SDA and SCL
VCC, RF_IN, GND, TxD, RxD, VCC_RF,
SDA and SCL
VCC, RF_IN, GND, USB pins, TxD, RxD,
VCC_RF, SDA and SCL
Changes SPI implementation has changed:
With u-blox 6, SPI uses pins 2, 14, 15,
16. With u-blox 7, SPI is available on
pins 18, 19, 20, 21 when pin 2 set
low.
 See Table 14
Not supported SPI Flash On-board RTC clock not available on
MAX-7C, use the
“Single Crystal”
Feature instead.
Limitations SPI:
UART/ DDC and SPI share the same
pins and are mutually exclusive
No Configuration pins:
use of e-fuse possible (See Data Sheet
for more information)
ANT_ON voltage level (VCC_IO) No Configuration pins:
use of e-fuse possible
Table 13: Summary of important hardware migration issues