
PN6280_Hardware Design
Copyright © JSC NIIMA PROGRESS and NAVIA LLC
16
3.1.4
Hardware reset
Module third pin is the hardware reset input. The module will power off when it receives a 20ms low
level signal. The system has an internal pull up, the typical value is 1.8V, and do not need to pull up
externally.
Figure 3-3 System Reset
3.2 USIM
Interface
3.2.1 Pin description
PN6280 supports and be able to automatically detect 3.0V and 1.8V USIM card. USIM card interface
signal as shown in table 3-1.
Table 3-1 (U)SIM Pin Description
Pin NO.
Pin Name
Signal definition
Function Description
8
USIM_DATA
USIM card data pin
USIM card DATA signal, I/O signal
9
USIM_RST
USIM card reset pin
USIM card reset signal, output by the
module
10
USIM_CLK
USIM card clock pin
USIM card clock signal, output by the
module
11
USIM_VDD
USIM output voltage
USIM card power supply, output by
the module