LEA-6 / NEO-6 / MAX-6 - Hardware Integration Manual
UBX-14054794 Production Information Hardware description
Page 13 of 85
At start up ensure that the host allows enough time (250 ms) for the receiver to interrogate any external
EEPROM over the bus. The receiver always performs this interrogation within 250 ms of start up, and the
external host must provide the GPS receiver sufficient time to complete it. Only after the interrogation can
the host enter MASTER mode and have full control over the bus.
Following I2C serial EEPROM are supported:
Table 3: Recommend parts list for I2C Serial EEPROM memory
1.6.4 SPI (NEO-6, LEA-6R)
A Serial Peripheral Interface (SPI) is available with u-blox 6 NEO modules. The SPI allows for the connection of
external devices with a serial interface, e.g. FLASH memories or A/D converters, or to interface to a host CPU.
LEA-6R includes a Serial Peripheral Interface (SPI) for connecting external sensors. The interface can be operated
in SPI master mode only. Two chip select signals are available to select external slaves. See section 2.2.3.1.
TX ready indicator (data ready) for LEA-6H (FW 7.0x). See section 1.7.6.
Background information about the SPI interface is available in Appendix C.2.
1.6.4.1 Connecting SPI FLASH memory (NEO-6 modules)
SPI FLASH memory can be connected to the SPI interface to save Assist Now Offline data and/or receiver
configuration. It will automatically be recognized by firmware when connected to SS_N.
Figure 6 shows how external memory can be connected. Minimum SPI FLASH memory size is 1 Mbit.
u-blox GPS Receiver SPI Master
SS_N
MISO
SCS_N
MI
VDD
MOMOSI
SCK SCK
VDD
Figure 6: Connecting external SPI Memory to u-blox GPS receivers
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