User's Manual

Smart Machine Smart Decision

SIM5360A_User_Manual_V1.03 2014-07-03

Figure 20: Reference circuit of level shift

To comply with RS-232-C protocol, the RS-232-C level shifter chip should be used to connect SIM5360A

to the RS-232-C interface. In this connection, the TTL level and RS-232-C level are converted mutually.

SIMCom recommends that user uses the SP3238ECA chip with a full modem. For more information

please refers to the RS-232-C chip datasheet.

Note: SIM5360A supports the baud rate: 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600,

115200, 230400, 460800, 921600, 3200000, 3686400, 4000000bps. Default rate is 115200bps.

3.4 SD/MMC Interface

SIM5360A provides one 4-bit SD/MMC interface. Its operation voltage is 2.85V, with clock rates up to 52

MHz. It supports 1-bit SD/MMC or 4-bit SD data transmission mode. Though the same hardware

controller is used, the initialization procession for SD or MMC cards is different. SIM5360A will detect

which card is inserted automatically.

Note: Interface with SD/MMC memory cards up to 32GB.

3.4.1 Pin Description

Table 10: Pin description

Pin name Pin No. Function

SD_DATA0

SD/MMC card data0

SD_DATA1

SD card data1

SD_DATA2

SD card data2

SD_DATA3

SD card data3

SD_CLK

26 SD card clock

SD_CMD

21 SD card command