Huawei EM770 - Page 24

HUAWEI EM770 HSPA PC Embedded Module V100R001
Product Specification
Issue 1
(2008-09-15)
Huawei Confidential: This documents is Huawei Proprietary and Confidential(NDA
Required).It may not be duplicated, neither distributed externally without
prior and written permission of Huawei.
Page
24 of 68
Table 3-6 USIM pins
Pin Name Description Direction to
Module
8 UIM_PWR Power source for the external
UIM/SIM.
Output
10 UIM_DATA External UIM/SIM data signal. Input/Output
12 UIM_CLK External UIM/SIM clock signal. Output
14 UIM_RESET External UIM/SIM reset signal. Output
16 UIM_Vpp Programming power connection used
to program EEPROM of first
generation ICCs, but not used now.
Not connected
Note:
It is recommended that the SIM card is inserted only after the power of the module is
disconnected, otherwise the SIM card can be destroyed.
USIM interface schematic reference:
There is no SIM card interface circuit in the EM770 module, and users need to add
the USIM interface circuit. The definition of interface signals and the typical USIM
interface schematic are as follows.
Figure 3-1 USIM interface schematic on user’s PC
for faithgofar