User's Manual

Smart Machine Smart Decision
SIM7600NA-H_user manual _V1.00 33 2020-1-7
Because of the high bit rate on USB bus, more attention should be paid to the influence of the
junction capacitance of the ESD component on USB data lines. Typically, the capacitance should
be less than 1pF. It is recommended to use an ESD protection component such as ESD9L5.0ST5G
provided by On Semiconductor (
www.onsemi.com ).
D3 is suggested to select the diode with anti-ESD and voltage surge function, or user could add a
TVS for surge clamping. The recommend TVS please refer to table 7.
Note
： The USB_DN and USB_DP nets must be traced by 90Ohm+/-10% differential impedance.
3.5 HSIC interface
HSIC is a 2-signal source synchronous serial interface which uses 240MHz DDR signaling to
provide High-Speed 480Mbps USB transfers which are 100% host driver compatible with
traditional USB cable-connected topologies. Full-Speed (FS) and Low-Speed (LS) USB transfers
are not directly supported by the HSIC interface (a HSIC enabled hub can provide FS and LS
support, as well as IC_USB support)
The differences between HSIC and USB2.0 are listed below:
Table 11: Key differences between HSIC and HS-USB
HSIC USB2.0
Signal-ended signaling at 1.2 V Differential signaling
Two signals – STROBE, DATA Four wires – Ground, D+, D-, VBUS
Double data rate signaling Data inferred from differential signaling
HS-USB 480 Mbps only HS/FS/LS support
Maximum trace length of 10 cm Maximum cable length of 5 m
No HS chirp protocol HS chirp protocol
Lower power consumption (digital) Higher power consumption (analog)
No concept of disconnect Hot plug/play support
module implements a HSIC interface compliant with the HSIC1.0 specification which can be used
to connect to the external IC.
Note: The module HSIC default work as HSIC to LAN function, if user have any other
questions , please contact simcom for more details.
3.6 SGMII Interface
MODULE provides a SGMII interface with an Ethernet MAC embedded, users could add a PHY to
connect to the Ethernet, and the PHY device could be controlled by the MDIO interface and other
dedicated signals.
Two Ethernet PHY are supported: AR8031/AR8033 (Qualcomm) and BCM89820 (Broadcom). The
AR8031/AR8033 is used for the industrial field and the BCM89820 is dedicated for the automotive
field.
Main features of SGMII:
 Ethernet Mac integrated in the module
 IEEE 802.3 Ethernet 10/100/1000Mbps, SGMII IF
 Supports IEEE 1588, Precision Time Protocol (PTP)