User Guide

LARA-R2/R6 migration guide - Application note
UBX-21010015 - R02 Migration between LARA modules Page 10 of 25
C1-Public
No
LARA-R2 series
LARA-R6 series
10
RTS
RTS
Main primary UART HW flow control input
(idle high, active low, with internal active pull-up enabled)
V_INT voltage supply domain (1.8 V)
Internal active pull-up strength: ~7.5 kΩ
Main primary UART HW flow control input
(idle high, active low, with internal active pull-up enabled)
V_INT voltage supply domain (1.8 V)
Internal active pull-up strength: ~100 kΩ
11
CTS
CTS
Main primary UART HW flow control output
(push-pull, idle high, active low).
V_INT voltage supply domain (1.8 V)
Output driver strength: 6 mA
Main primary UART HW flow control output
(push-pull, idle high, active low).
V_INT voltage supply domain (1.8 V)
Output driver strength: 2 mA
12
TXD
TXD
Main primary UART data input
(idle high, active low, with internal active pull-up enabled).
V_INT voltage supply domain (1.8 V)
Internal active pull-up strength: ~7.5 kΩ
Main primary UART data input
(idle high, active low, with internal active pull-up enabled).
V_INT voltage supply domain (1.8 V)
Internal active pull-up strength: ~100 kΩ
13
RXD
RXD
Main primary UART data output
(push-pull, idle high, active low).
V_INT voltage supply domain (1.8 V)
Output driver strength: 6 mA
Main primary UART data output
(push-pull, idle high, active low).
V_INT voltage supply domain (1.8 V)
Output driver strength: 2 mA
14
GND
GND
Ground
Ground
15
PWR_ON
PWR_ON
Power-on/off input
(idle high, active low, with 10 kΩ internal pull-up).
V_BCKP voltage supply domain (1.8 V)
L-level: -0.30 ÷ 0.54 V
L-level pulse time to trigger switch on:
50 µs min
L-level pulse time to trigger graceful switch off:
1.0 s min
No external pull-up to be connected
Test point recommended
Power-on/off input
(idle high, active low, with ~200 kΩ internal pull-up).
Internal voltage supply domain (~0.8 V at the pin in idle)
L-level: -0.30 ÷ 0.35 V
L-level pulse time to trigger switch on:
0.15 s min ÷ 3.2 s max
L-level pulse time to trigger graceful switch off:
1.5 s min
No external pull-up to be connected
Test point recommended
16
GPIO1
GPIO1
GPIO configurable as Input, Output, Network status
indication, external GNSS supply enable.
Default: tri-stated with internal pull-down enabled.
V_INT voltage supply domain (1.8 V)
Push-pull output type.
Output driver strength: 6 mAInternal active pull-up
strength: ~17 kΩ
GPIO configurable as Input, Output, Network status
indication, external GNSS supply enable.
Default: tri-stated with internal pull-down enabled.
V_INT voltage supply domain (1.8 V)
Push-pull output type.
Output driver strength: 2 mA
Internal active pull-up/down strength: ~100 kΩ
17
VUSB_DET
VUSB_DET
5 V sense input to detect USB host and enable the USB.
H-level: 1.5 ÷ 5.25 V
Test point highly recommended
5 V sense input to detect USB host and enable the USB
H-level: 1.5 ÷ 5.25 V
Test point highly recommended
18
RESET_N
RESET_N
Abrupt emergency reset shutdown input
(idle high, active low, with 10 kΩ internal pull-up).
V_BCKP voltage supply domain (1.8 V)
L-level: -0.30 ÷ 0.54 V
L-level time to trigger abrupt PMU and module reboot:
50 ms min
Test point recommended
Abrupt emergency reset shutdown input
(idle high, active low, with ~37 kΩ internal active pull-up).
Internal voltage supply domain (~1.8 V at the pin in idle)
L-level: -0.30 ÷ 0.63 V
L-level time to trigger graceful module reboot:
50 ms min ÷ 6 s max
L-level time to trigger abrupt module switch off:
10 s min
Test point recommended