UBX-G7020 - Hardware Integration Manual
Design-in
GPS.G7-HW-10003
Objective Specification
Page 16 of 74
2.2
PIOs
There are 17 PIOs, PIO0 to PIO16, available on the UBX-G7020. All the PIOs are supplied by VDD_IO, thus all the
voltage levels of the PIO pins are related to VDD_IO supply voltage. All the inputs have internal pull-up resistors
in normal operation. Thus PIOs can be left open if not used.
The PIOs functions comprise the communication interfaces, antenna supervision, some configuration, the time
pulse and interrupt signals.
PIO
#
Default
Function
I/O
Remarks
Alternative
Functions
0
SQI_D0 or
CFG_FFU2
I/O
I
Data line 0 to external SQI FLASH or reserved configuration pin
In case PIO5 is GND (no SQI flash used) it acts as a reserved configuration pin
1
SQI_D1 or
CFG_DCDC
I/O
I
Data line 1 to external SQI FLASH or configuration pin
In case PIO5 is GND (no SQI flash used) it acts as a configuration pin to enable DCDC
converter
2
SQI_D2 or
CFG_OSC3
I/O
I
Data line 2 to external SQI FLASH or configuration pin
In case PIO5 is GND (no SQI flash used) it acts as an oscillator configuration pin
3
SQI_D3 or
CFG_OSC2
I/O
I
Data line 3 to external SQI FLASH or configuration pin
In case PIO5 is GND (no SQI flash used) it acts as an oscillator configuration pin
4
SQI_CLK or
CFG_OSC1
O
I
Clock for external SQI FLASH or configuration pin
In case PIO5 is GND (no SQI flash used) it acts as an oscillator configuration pin
5
SQI_CS or
CONFIG_SEL
I/O
I
Chip select for external SQI FLASH or configuration enable pin
If low at startup (no SQI flash used) PIO0 to PIO4 become configuration pins
6
TX or
MISO
O
O
UART TX or SPI MISO
Depends on PIO10 (D_SEL) status
TX-ready
7
RX or
MOSI
I
I
UART RX or SPI MOSI
Depends on PIO10 (D_SEL) status
8
SCL or
SCK
O
O
DDC clock or SPI clock
Depends on PIO10 (D_SEL) status
9
SDA or
CS_N
I/O
O
DDC data or SPI chip select
Depends on PIO10 (D_SEL) status
10
D_SEL
I
Communication interface selection pin
Selects the communication interface available on PIO6 to PIO9
11
TIMEPULSE1
O
Time pulse 1 output, 1pps
12
SAFEBOOT_N
I
If low at startup the receiver will start in Safe Boot Mode. Used in production for
setting the Low Level Configuration, programming the SQI flash and testing purposes.
TIMEPULSE2
13
-
I
No function by default, leave open
EXTINT0,
TX-ready
14
-
I
No function by default, leave open
EXTINT1,
ANT_DET,
TX-ready
15
ANT_OK
I
Antenna status of antenna supervisor
ANT_SHORT_N,
UART_TX,
TX-ready
16
ANT_OFF
O
Antenna power control of antenna supervisor
UART_RX,
TX-ready
Table 1: PIO overview
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