Smart LTE Module Series
SC600Y&SC600T Hardware Design
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Table 10: Pin Definition of USB Interface
Pin Name
Pin No. I/O
Description
Comment
USB_VBUS
41, 42
PI/PO
Charging power input;
Power supply output for OTG device;
USB/charger insertion detection.
Vmax=10V
Vmin=4.0V
Vnorm=5.0V
USB_DM
33
IO
USB 2.0 USB differential data bus
(minus)
Require differential
impedance of 90Ω
USB_DP
32
IO
USB 2.0 USB differential data bus
(plus)
USB_ID
30
AI
USB ID detection
High level by default
USB_SS_RX_P
171
AI
USB 3.0 differential receive (plus)
Require differential
impedance of 90Ω
USB_SS_RX_M
172
AI
USB 3.0 differential receive (minus)
USB_SS_TX_P
174
AO
USB 3.0 differential transmit (plus)
USB_SS_TX_M
175
AO
USB 3.0 differential transmit (minus)
USBC_CC2
223
AI/
AO
USB Type-C control configuration
channel 2
USBC_CC1
224
AI/
AO
USB Type-C control configuration
channel 1
USB_SS_SEL
226
DO
USB Type-C switch control
USB_OPT
217
AI
Type-C/ Micro USB select control
Float
,
select Type-C.
Connect 1K to GND,
select Micro USB.
USB_VBUS can be powered by USB power or adapter. It is used for USB connection detection and
power supply input for battery charging. Its input voltage ranges from 4.0V to 10.0V, and the typical value
is 5.0V. SC600Y&SC600T modules support charging management for a single cell Li-ion battery, but
varied charging parameters should be set for batteries with varied models or capacities. The maximum
charging current is up to 3.0A.
The module also supports USB On-The-Go (OTG) function, through using USB_ID pin to detect whether
the OTG device is attached: when USB_ID is kept open (high level by default), SC600Y&SC600T are in
USB slave mode; if USB_ID is connected to ground, it is in OTG mode and USB_VBUS is used to supply
power for peripherals with maximum output of 5V/1A.
The switch between Type-C and Micro USB is determined by USB_OPT of pin 217. If USB_OPT is
floating, It is only need to select Type-C. If USB_OPT connects to GND via 1K, It is only need to select
Micro USB .