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GPUSB101A Datasheet(PDF) 17 Page - Generalplus Technology Inc.

Part # GPUSB101A
Description  USB Bridge Controller
PDF  37 Pages
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Manufacturer  GENERALPLUS [Generalplus Technology Inc.]
Direct Link  http://www.generalplus.com
Logo GENERALPLUS - Generalplus Technology Inc.

GPUSB101A Datasheet(HTML) 17 Page - Generalplus Technology Inc.

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GPUSB101A
© Generalplus Technology Inc.
Proprietary & Confidential
17
Sep 24, 2014
Version: 1.4
10. GPUSB101A USER'S GUIDE
10.1. Introduction
10.1.1. Features
GPUSB101A is a bridge IC which provides the interface between
PC and a host controller through USB1.1 Vender Command.
When PC detects that GPUSB101A is plugged in, PC will indicate
that a new USB device is inserted on device manager, and the PC
application can access that new USB device via Generalplus USB
driver. In GPUSB101A, there are 4 interfaces to interface with a
host controller, including SPI interface, Parallel Bus 8 bit interface,
Parallel Bus 4 bit interface, and Software UART. Moreover, the
communication protocol between GPUSB101A and PC follows the
USB1.1 specification.
By GPUSB101A, PC is able to write, read and erase SPI Flash as
a mass storage device and then the host controller can access
SPI Flash either through SPI interface of the host controller or
through the interfaces of GPUSB101A. Moreover, the application
program on PC also can interact with the host controller to perform
some applications such as playing songs, driving LEDs or motors
through USB vender commands.
Interface
I/O
Function
SPI
8
1. PC Download data to SPI flash
2. PC access HOST IC
3. HOST IC access SPI flash
Parallel 8 bit
13
1. PC Download data to SPI flash
2. PC access HOST IC
3. HOST IC access SPI flash
Parallel 4 bit
9
1. PC Download data to SPI flash
2. PC access HOST IC
3. HOST IC access SPI flash
S/W UART
2
1. PC access HOST IC
10.2. System Function Diagram
10.2.1. SPI interface: 4 GPIO + 4 SPI
Application
Path
Class
Transfer
Note
Download
PC
GPUSB101A
SPI Master mode
SPI flash
Mass storage
Bulk
Vendor command
PC link Host IC
PC
GPUSB101A
SPI Slave mode
Host IC
Mass storage
Bulk
Vendor command
Host IC access flash
Host IC
SPI/Transparent mode
SPI flash
Mass storage
Bulk
Vendor command



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