-44-
Figure.3-8-2 SD CARD Interface
The MT6235 contains a dedicated smart card interface to allow the MCU access to the SIM
card. It can operate via 4terminals, using VSIM, SIMI/O, SIMRST, SIMCLK
The VSIM is used to control the external voltage supply to the SIM card. SIMRST is used as
the SIM card reset signal. SIMI/O and SIMCLK are used for data exchange purpose.
The SIM interface acts as a half duplex asynchronous communication port and its data format
is composed of ten consecutive bits: a start bit in state Low, eight information bits, and a tenth bit
used for parity checking.
The SD Card control signal and data signal is controlled by MT6235.
To Next Page
Loading...
