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AT43USB380

ATMEL Corporation
Part Number AT43USB380
Manufacturer ATMEL Corporation
Description On-The-Go Upgrade
Published Mar 25, 2010
Detailed Description www.DataSheet4U.com Description The AT43USB380 is a straightforward upgrade of the AT43USB370 Host/Function Processor t...
Datasheet PDF File AT43USB380 PDF File

AT43USB380
AT43USB380

Overview
www.
DataSheet4U.
com Description The AT43USB380 is a straightforward upgrade of the AT43USB370 Host/Function Processor to support the USB 2.
0 On-The-Go (OTG) specification.
It can operate either as a single-chip Host/Function Processor or if used in conjunction with an external Atmel Charge Pump, as a full OTG solution.
The AT43USB380 is functionally equivalent to the AT43USB370 as a Host/Function Processor and can be used in place of the AT43USB370 in the existing AT43USB370 design with minor hardware modifications.
The pinout differences between the AT43USB370 and the AT43USB380 are due to the inclusion of the on-chip OTG interface in the AT43USB380.
To support OTG functionality, an external Charge Pump has to be connected to the OTG interface of the AT43USB380, as shown in Figure 1 on page 7.
The external Charge Pump serves in the following two capacities: 1.
As a power source to the downstream USB devices.
2.
As a signaling interface during the OTG session negotiation upon connection.
From the hardware standpoint, the AT43USB380 is equivalent to the AT43USB370 with the following exceptions: • On-chip OTG Interface.
This hardware block is added to the AT43USB380 to support the OTG functionality.
Signals in the OTG interface include ID, DISCHARGE, PUMP, CONTROL, EN, SESS_VLD, SESS_END, SESS_HIGH and SESS_LOW.
This interface is used during an OTG session to determine the roles of the AT43USB380 and the connected OTG-enabled USB device either as a host or a function.
8/16/32 Bit Generic Host Processor Interface.
The AT43USB380 has a variable width, generic host processor interface whereas the AT43USB370 supports only 32-bit host interface.
The width of the host interface on the AT43USB380 is determined by firmware configuration.
Simplified System Interface.
The GPIOs required in AT43USB370 for handshaking are no longer required in AT43USB380.
The system processor can write directly to the AT43USB380 registers thus eliminates the need for PROG, SEL, READY, DONE, MORE...


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