Usb Interface; Audio Interface - SimCom SIMT 1502 Manual

SHANGHAI SIMCOM LIMITED

4.3 USB interface

SIMT1502 contains a USB interface which support On-The-Go. It is compliant with the USB2.0
specification. The USB2.0 specification requires hosts to support all three USB speeds, low-speed
(1.5Mbps), full-speed (12Mbps) and high-speed (480Mbps).
See Table4-3 and Figure4-1 for more details.
Table4-3 USB interface description
Signal Pin#
USB_DM 44
USB_DP 45
USB_HS_ID 78
VBUS_USBIN 87
Figure4-1 USB application diagram

4.4 Audio interface

Codec integrated within PMU
No SLIMBUS
No digital mic support
Audio inputs: Up to three analog microphones, with integrated mic bias;
Audio output : Headphones with headset detection; Differential earpiece; Differential loud
speaker driver; Single-ended line output
See Table4-4 and Figure4-2for more details.
Description
USB 2.0 serial data minus
USB 2.0 serial data plus
USB OTG ID
USB_IN
Direction
AI/AO
AI/AO
AI
POWER
21