Usb_Dm; Usb_Dp; Usb_Id; Usim2_Vdd - SimCom SIM8905A User Manual

Output Power Management
Table 2: Output power management summary
Pin Name Pin#
LDO5_1V8
LDO6_1V8
SD_LDO11
SD_LDO12

USIM1_VDD

USIM2_VDD

LDO17_2V85
USB Interface
SIM8905A provides one High-speed USB 2.0 interface, used for software upgrading, debugging, charging, etc.
In addition, SIM8905A supports OTG function, but external 5V power supply is required.
Specified range (V)
111
1.8
125
1.8
38
2.95
32
1.8/2.95
26
1.8/2.95
21
1.8/2.95
129
2.85
USB_VBUS

USB_DP

USB_DM

1uF

USB_ID

GND
Module
Figure 13: USB reference circuit
Smart Machine Smart Decision
Rated current (mA)
50
200
600
50
50
50
420
VBUS
USB_DP
USB_DM
<1pF
GND
Connector
12
Expected use
Force USB boot
Display, camera, sensors
SD/MMC card
For SD signals pull-up
USIM 1
USIM 2
Display, camera, sensors