Programming Model
23-24 ADSP-214xx SHARC Processor Hardware Reference
ROM Booting
There are two access types (modes) available for ROM booting: secured
and non secured modes which are described below.
Secured ROM (hardware security switch = 1. In this mode:
•
BOOTCFG2-0 pins are ignored.
• Emulation is enabled only when the user enters a valid key.
• IIVT is placed into the internal ROM. It can be changed to the
internal RAM by setting IIVT bit of
SYSCTL register.
• Code always executes from internal ROM.
Non Secured ROM (hardware security switch = 0. In this mode:
• BOOTCFG2-0 pins select the booting modes.
• Emulation is always enabled.
• IIVT is placed into the internal RAM except for the case where
BOOTCFG2-0 = 011.
Programming Model
This section describes the operation of the boot process. This process is
accomplished using the default loader kernel (Visual DSP Tools) to gener-
ate the boot stream. For more details, refer to the loader source files.
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