Ruim Card Interface; Overview - Huawei MC509 Series Hardware Manual

HUAWEI MC509 Series CDMA LGA Module
Hardware Guide
According to USB protocol, for bus timing or electrical characteristics of MC509 USB
signal, please refer to the chapter 7.3.2 of Universal Serial Bus Specification 2.0.
Figure 3-15 Recommended circuit of USB interface

3.7 RUIM Card Interface

3.7.1 Overview

The MC509 module provides a RUIM card interface complying with the C.S0023
standard and supports automatic detection of a 3.0 V RUIM card or a 1.8 V RUIM
card. Table 3-9 lists the RUIM card interface signals.
Issue 02 (2013-05-06)
 Since the USB interface of MC509 module supports USB 2.0 full speed, the resistance
"RV102 and RV103" must be Voltage Sensitive Resistor with small capacitance
(ALVC18S02003 manufactured by AMOTECH or B72590T7900V60 manufactured by
EPCOS is recommended.). In addition, The layout design of this circuit on the DTE board
should comply with the USB 2.0 full speed protocol, with differential lining and impedance
control to 90 ohm
It is recommended that set USB D+ and USB D- pins as test points and then place these

test points on the DTE for debug.
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Description of the Application Interfaces
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