Rainbow Electronics AT89C5132 - Manual (Page 2)

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AT89C5132
4256A–USB–06/03
Functional
Description
The AT89C5132 USB Bootloader facilitates In-System Programming (ISP) and In-Appli-
cation Programming (IAP) .
In-System Programming
Capability In-System Programming allows the user to program or reprogram the microcontroller
on-chip Flash memory without removing it from the system and without the need of a
pre-programmed application.
The USB bootloader can manage a communication with a host through the USB bus. It
can also access and perform requested operations on the on-chip Flash memory.
In-Application
Programming or Self-
Programming Capability IAP allows the reprogramming of the microcontroller on-chip Flash memory without
removing it from the system and while the embedded application is running.
The USB bootloader contains some Application Programming Interface routines named
API routines allowing IAP by using the user’s firmware.
Block Diagram This section describes the different parts of the USB bootloader. Figure 1 shows the on-
chip bootloader and IAP processes.
Figure 1. Bootloader Process Description
ISP Communication
Management
User
Application
USB Protocol
Communication
Management
Flash
Memory
External host via the
Flash Memory
IAP
Management
User Call
On-chip