User's Manual

Table Of Contents

Hardware Development Guide of Module Product

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ZM8620_V2

4.3 Power Interface

4.3.1 Description of Power PINs

Power VCC (PIN No: 2, 24, 39, 41, 52). This is the positive signal of 3.3V power supply.

GND signal (PIN No: 4, 9, 15, 18, 21, 26, 27, 29, 34, 35, 37, 40, 43, 50). This is the power ground and

signal ground of the module, which needs to be connected to the ground on the system board. If the

GND signal is not connected completely, the performance of the module will be affected.

4.3.2 Requirement of Power Supply

The power supply is recommended to be within the range of 3.1~3.6V. If the network is in poor situation,

the antenna will transmit at the maximum power, and the transient maximum peak current less than 2G

mode can reach as high as 1.8A. So the power supply capacity for peak current needs to be above 2.5A,

and the average peak current needs to be above 0.9A.

4.4 (U)SIM Card Interface

4.4.1 Description of PINs

ZM8620_V2 module baseband processor integrates the (U)SIM card interface. The signals on SIM card

interface is as shown in Figure 4-3.

Figure 4–3 (U)SIM Card Signal Connection Circuit

VREG_UIM