User's Manual

Smart Machine Smart Decision

SIM7100A_User Manual_V1.01 2014-12-11

Figure 20: Amphenol SIM card socket

Table 17: Amphenol USIM socket pin description

Pin Signal Description

C1 USIM_VDD

SIM Card Power supply, it can identify automatically the SIM Card

power mode，one is 3.0V±10%, another is 1.8V±10%.

C2 USIM_RST SIM Card Reset.

C3 USIM_CLK SIM Card Clock.

C5 GND Connect to GND.

C6 VPP

C7 USIM_DATA SIM Card data I/O.

3.6 PCM Interface

SIM7100A provides hardware PCM interface for external codec. The PCM interface enables

communication with an external codec to support hands-free applications. SIM7100A PCM interface can

be used in two modes: the default mode is auxiliary PCM (8 KHz long sync mode at 128 KHz PCM CLK);

the other mode is primary PCM (8 KHz short sync mode at 2048 KHz PCM CLK). In short-sync

(primary PCM) mode, SIM7100A can be a master or a slave. In long-sync (auxiliary PCM) mode,