Integration Manual

Table Of Contents
LISA-U2 series - System Integration Manual
UBX-13001118 - R25 Appendix Page 172 of 182
LISA-U1 series
LISA-U2 series
22
RESET_N
External reset input
RESET_N
External reset input
RESET_N hardware reset or switch-on low
pulse time:
LISA-U1 series:
L-level pulse time = 50 ms min
LISA-U2 series:
L-level pulse time = 50 ms min
RESET_N operating voltage difference:
LISA-U1 series:
L-level input = -0.30 V min / 0.65 V max
H-level input = 1.69 V min / 2.48 V max
Internal 10kΩ pull-up to V_BCKP (2.3 V
typ.)
LISA-U2 series:
L-level input = -0.30 V min / 0.51 V max
H-level input = 1.32 V min / 2.01 V max
Internal 10 kΩ pull-up to V_BCKP (1.8 V
typ.)
23
GPIO3
GPIO
GPIO3
GPIO
Configurable GPIO, 1.8 V typ.
LISA-U1 series:
Output driver strength = 4 mA
LISA-U2 series:
Output driver strength = 6 mA
Functions on all LISA-U series:
Pad disabled
Input / Output
Network Status Indication
GNSS Supply Enable
GNSS Data Ready (default)
24
GPIO4
GPIO
GPIO4
GPIO
Configurable GPIO, 1.8 V typ.
LISA-U1 series:
Output driver strength = 4 mA
LISA-U2 series:
Output driver strength = 6 mA
Functions on all LISA-U series:
Pad disabled
Input / Output
Network Status Indication
GNSS Supply Enable
GNSS RTC Sharing (default)
25
GND
Ground
GND
Ground
26
USB_D-
USB Data Line D-
input/output
USB_D-
USB Data Line D-
input/output
No difference
27
USB_D+
USB Data Line D+
input/output
USB_D+
USB Data Line D+
input/output
No difference
28...38
GND
Ground
GND
Ground
39
MIC_N
LISA-U120,
LISA-U130:
Differential analog
audio input (neg.)
LISA-U100,
LISA-U110:
RESERVED pin
I2S1_RXD /
GPIO6
LISA-U2 series,
2
nd
I
2
S Rx data input /
GPIO
LISA-U120, LISA-U130:
Differential analog audio input (neg.)
LISA-U2 series:
I2S1_RXD and configurable GPIO, 1.8 V
typ.
Output driver strength = 1 mA
Internal active pull-down = 150 µ A
Functions:
I2S1_RXD (default)
Pad disabled
Input / Output