Specifications

M80 Hardware Design
M80_HD_V1.0 - 63 -
SIM_CLK
C3
SIM Card Clock
SIM_PRESENCE
C4
SIM Card Presence Detection
GND
C5
Ground
VPP
C6
Not Connect
SIM_DATA
C7
SIM Card Data I/O
SIM_DETECT
C8
Pulled down GND with external circuit. When the tray is
present, C4 is connected to C8.
3.12. Camera interface
Not supported at present.
3.13. SD card interface
Not supported at present.
3.14. PCM interface
Not supported at present.
3.15. USB interface
M80 provides USB interface which complies with USB 1.1 FS/LS specification. It supports
12Mbps in full speed mode. It cannot act as a host device.
Table 18: USB interface characteristics
USB interface only supports downloading software and should cooperate with DOWNLOAD pin.
Name
Pin
Function
USB_DM
22
USB data negative
USB_DP
23
USB data positive
Quectel
Confidential