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Product Detailed Parameters
- Description：IC PROCESSOR USB 2.0 100-TQFP
- Series：AVR®
- Mfr：Microchip Technology
- Package：Tray
- Applications：USB Host/Function Processor
- Core Processor：-
- Program Memory Type：-
- Controller Series：AT43USB
- RAM Size：-
- Interface：USB
- Number of I/O：32
- Voltage - Supply：-
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：100-LQFP
- Supplier Device Package：100-LQFP (14x14)
- Grade：-
- Qualification：-
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Overview
The AT43USB380E-AI is a USB 2.0 On-The-Go (OTG) Host/Function Processor designed as an upgrade to the AT43USB370. It integrates an on-chip OTG interface and supports variable-width generic host processor interfaces of 8, 16, or 32 bits, configurable via firmware. The device operates with a 3.3V supply and includes specific pins for external charge pump control to manage VBUS signaling and power during OTG session negotiations. It utilizes high-level ANSI C-compliant APIs for transparent USB protocol handling.
Feature Summary
- Supports USB 2.0 OTG specification with integrated ID pin detection for role determination
- Configurable system interface width supporting 8-bit, 16-bit, or 32-bit data buses
- Includes low-level firmware for Host Negotiation Protocol (HNP) and Session Request Protocol (SRP)
- Provides up to 16 GPIO pins multiplexed with the host processor interface
Applications
- USB 2.0 On-The-Go Host/Function implementations
- Systems requiring direct connection to Mini-A or Mini-B receptacles
- Host processors needing simplified handshaking via direct register access
Procurement Notes
Verify component authenticity through authorized Microchip distributors. Confirm package integrity and check for moisture sensitivity level compliance prior to assembly. Ensure ordering suffixes match required temperature ranges and packaging specifications.
Selection Notes
Select this component when upgrading from AT43USB370 designs requiring OTG capabilities. Ensure the host processor supports the desired bus width configuration. An external charge pump is mandatory for full OTG functionality to handle VBUS power and signaling.
Part Context
This device belongs to the AT43USB series of USB controllers. It maintains functional equivalence with the AT43USB370 while adding OTG hardware blocks. It shares the same debugging tools and firmware libraries as its predecessor, facilitating migration for existing designs.
Replacement Considerations
The AT43USB370 serves as a compatible predecessor for non-OTG applications. Migration requires minor hardware modifications to accommodate the on-chip OTG interface signals and external charge pump connections.
