Hardware Development Guide of Module Product
18
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between UIM_CLK, UIM_RST and GND, to filter out the interference by RF signals.
It is recommended to cascade a 20ohm resistance on UIM_DATA cable.
3.5.3
Application of (U)SIM Card Interface
Figure 3-2 (U)SIM Card Signal Connection Circuit
3.6
SD Card Interface
3.6.1
Description of PINs
The SD card interface of ZM5202 module is the storage card based on FLASH,
embedded with 4-bit and 1-bit SD controller, supporting SD and Mini SD cards. Its
PIN signals are as shown in Table 3-6.
Table 3-6 Definition of SD Card Signal Interface
PIN
Signal Name
Description
Function
61
SDCC_DATA0 SD card data cable PIN
SD card data cable
60
SDCC_DATA1 SD card data cable PIN
59
SDCC_DATA2 SD card data cable PIN
58
SDCC_DATA3 SD card data cable PIN
57
SDCC_CLK
SD card clock cable PIN
SD control clock output
can reach up to 20MHz
56
SDCC_CMD
SD card control PIN
--
55
VREG_MMC
SD card power
3V