Hardware+Design V1.07

Smart Machine Smart Decision
Table 19: GPIO configuration
Keypad interface GPIO No.
KEYPAD_4 GPIO6
KEYPAD_3 GPIO7
KEYPAD_2 GPIO8
KEYPAD_1 GPIO9
KEYPAD_0 GPIO10
KEYSENSE_N4 GPIO11
KEYSENSE_N 3 GPIO12
KEYSENSE_N 2 GPIO13
KEYSENSE_N 1 GPIO14
KEYSENSE_N 0 GPIO15
Note: Refer to document [23] for detailed information of Keypad Application Note.
3.8 USB Interface
SIM5320 module contains a USB interface. This interface is compliant with the USB2.0 specification. The
USB2.0 specification requires hosts such as the computer to support all three USB speeds, namely
low-speed (1.5Mbps), full-speed (12Mbps) and high-speed (480Mbps). USB charging and USB-OTG is
not supported.
Table 20: Electronic characteristic
Input voltage scope( V )
Pin name Pin No.
Min Typ Max
USB_VBUS 11 4.4 5.0 5.25
USB_DP 13
USB_DM 12
They are compliant with the USB 2.0 specification.
3.8.1 Application Guide
Currently SIM5320 supports the USB suspend and resume mechanism which can help to save power. If
no transaction is on USB bus, SIM5320 will enter suspend mode. When some events such as voice call or
receiving SMS happen, SIM5320 will resume normal mode automatically.
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