u-blox LEON-G100 ECALL, Руководство по системной интеграции

Страница: 77 / 125

LEON-G100 / LEON-G200 - System Integration Manual
GSM.G1-HW-09002-G3 Preliminary System description
Page 77 of 125
No Module Name Description Remarks
24 LEON-Gx00-04S
LEON-Gx00-05S Reserved Reserved Pad disabled
LEON-G100-06x
LEON-G200-06S
or subsequent GPIO4 GPIO By default, the pin is configured to provide the GPS RTC sharing function.
Can be alternatively configured by the AT+UGPIOC command as

Output function

Input function

Network Status Indication function

GPS Supply Enable function

Pad disabled function
18 LEON-Gx00-04S
LEON-Gx00-05S HS_DET Headset
detection The pin is configured to provide the Headset detection function.
LEON-G100-06x
LEON-G200-06S
or subsequent HS_DET GPIO By default, the pin is configured to provide the Headset detection function.
Can be alternatively configured by the AT+UGPIOC command as

Output function

Input function

Network Status Indication function

GPS Supply Enable function

Pad disabled function
Table 28: GPIO pins
The GPIO pins ESD sensitivity rating is 1 kV (HBM JESD22-A114F). A higher protection level could be
required if the lines are externally accessible on the application board. A higher protection level can be
achieved mounting an ESD protection (e.g. EPCOS CA05P4S14THSG varistor array) on the lines
connected to these pins.
Figure 43 describes an application circuit for a typical GPIO usage (GPS supply enable, GPS RTC sharing, GPS
data ready, Headset detection, Network indication).
Use transistors with at least an integrated resistor in the base pin or otherwise put a 10 k Ω resistor on
the board in series to the GPIO.