Installation Instructions

SIM5216A _HD_V1.02 Hardware Design

SIM5216A _HD_V1.02 26.08.2010

3.11 USB interface

SIM5216A supports high and full speed universal serial bus (USB) interface, and mode of USB

can be switched by AT command ( AT+CUSBSPD ) This interface is compliant with the USB 2.0

specification. The high speed is up to 480Mbps. so please pay attention to influence of junction

capacitance of ESD component on USB data lines. Typically, the capacitance value should be

less than 4pF @1MHz.

Links to these and related specifications can be found at www.usb.org

Table 19: USB PIN connect

Input voltage scope( V )

Name PIN( B to B)

Min Type Max

USB_VBUS 9 4.4 5.0 5.25

USB_DP 60

USB_DM 59

They are compliant with the USB 2.0 specification.

GND 58

VBUS

D+

GND

D-

VBUS

D+

D-

GND

Series

A , B

Mini-B

Receptacle

Figure 22: USB interface

Currently SIM5216A supports the USB suspend & resume mechanism which can help to save

much current. If no transaction on USB bus then SIM5216A will enter to suspend mode and

when some events happens (such as incoming call or SMS received) during the suspend mode

then SIM5216A will resume automatically.

Note: when use the Mini-B it has no ID line.

Note

：

Two limitations on ESD protection: less than 4 pF and VBUS not to rail.