User's Manual

Smart Machine Smart Decision
SIM7600NA-H_user manual _V1.00 44 2020-1-7
related datasheet of eMMC which is used. The listed current of 500mA and 300mA are just
for your reference.
SD/MMC/eMMC card layout guide lines:
● Protect SD card signals from noisy signals (clocks, SMPS, etc.).
● Up to 200 MHz clock rate, 50 Ω nominal, ±10% trace impedance
● CLK to DATA/CMD length matching < 1 mm
● Total routing length < 50 mm
● Spacing to all other signals = 2x line width
● Bus capacitance < 10 pF
3.10 I2C Interface
MODULE provides a I2C interface compatible with I2C specification, version 5.0, with clock rate
up to 400 kbps. Its operation voltage is 1.8V.
The following figure shows the I2C bus reference design.
Figure31: I2C reference circuit
Note ： SDA and SCL do not have pull-up resistors in MODULE. So, 2 external pull up resistors
are needed in application circuit.
“AT+CRIIC and AT+CWIIC” AT commands could be used to read/write register values of the
I2C peripheral devices. For more details about AT commands please refer to document [1].
3.11 SDIO Interface
MODULE provides a 4 bit 1.8V SDIO interface for WLAN solution with W58 module.
The SDIO interface can be used for WLAN solution.
Note: Special software version for CAT4 MODULEs supports this function.