User's Manual

HE910 Hardware User Guide

1vv0300925 Rev.28 – 2015-06-24

11 USB HSIC

The HE910 Module is provided by one USB HSIC interface.

The USB HSIC (High Speed Inter Processor) Interface allows supporting the inter-processor

communication between an application processor (AP) – the host, and the modem processor

(CP) – the HE910.

The following table is listing the available signals:

Pad Signal Direction Function Type COMMENT

A12

HSIC_USB_DATA I/O USB HSIC data signal CMOS 1.2V

A11

HSIC_USB_STRB I/O USB HSIC strobe signal CMOS 1.2V

H15

HSIC_SLAVE_WAKEUP I Slave Wake Up CMOS 1.8V Shared with SPI_MRDY

F15

HSIC_HOST_WAKEUP O Host Wake Up CMOS 1.8V Shared with SPI CLK

K15

HSIC_SUSPEND_REQUEST O Slave Suspend Request CMOS 1.8V Shared with GPIO08

J15

HSIC_HOST_ACTIVE I Active Host Indication CMOS 1.8V Shared with SPI_SRDY

D13

VDD_IO1 I VDD_IO1 Input To be connected to E13

E13

1V8_SEL O 1V8 SEL for VDD_IO1 To be connected to D13

The signal 1V8_SEL must be connected to the VDD_IO1 input pin to properly supply this

digital section.

For the detailed use of USB HSIC port please refer to the related Application Note.

NOTE:

Due to the shared functions, when the USB_HSIC port is used, it is not possible to use the SPI

and the GPIO_08.

The USB_HSIC is not active by default but it has to be enabled using the AT#PORTCFG

command (refer to the AT User guide for the detailed syntax description).