User's Manual

SHANGHAI SIMCOM LIMITED
21
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# Description Direction
USB_DM 44 USB 2.0 serial data minus AI
/
A
O
USB_DP 45 USB 2.0 serial data plus AI
/
A
O
USB_HS_ID 78 USB OTG ID AI
VBUS_USBIN 87 USB_IN POWER
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.