AR1100 Microchip Technology, Inc., AR1100 Datasheet - Page 31

• Manufacturer Part Number: AR1100
• Manufacturer: Microchip Technology, Inc.

8.0
The boot load process and associated commands
enables the host to reprogram the AR1100. Because
the size of the Flash program memory cannot accom-
modate both a boot load section and application sec-
tion, the AR1100 is programmed in sections using 3
passes. With each pass, a USB device will necessarily
re-enumerate.
FIGURE 8-1:
 2011 Microchip Technology Inc.
Note:
BOOT LOADER
The boot load operation is supported only
in
communication
Section 7.6, USB Mode
AR1100 RESISTIVE USB AND RS-232 TOUCH SCREEN CONTROLLER
UART
BOOT LOADING SEQUENCE
and
modes.
Change.
HID-GENERIC
Refer
Preliminary
to
Passes:
1.
2.
3.
This process is illustrated in a more detail in
below.
Note:
Program temporary boot load application into
upper memory
Execute from temporary boot load application to
program the lower half of the new application
Execute from the lower half of the new applica-
tion to program the upper half
A stand-alone software utility is available
from Microchip to facilitate the boot
loading operation. This functionality is
also available with the Microchip AR
Configuration Utility.
DS41606A-page 31
Figure 8-1