VisualDSP++ 4.5 Loader and Utilities Manual - Analog Devices

Loader for ADSP-2126x/2136x/2137x SHARC Processors
Software developers who use the loader utility should be familiar with the
following operations.
“Power-Up Booting Process” on page 5-3
“Boot Mode Selection” on page 5-4
“ADSP-2126x/2136x/2137x Processors Boot Modes” on page 5-5
“ADSP-2126x/2136x/2137x Processors Boot Kernels” on
page 5-19
“ADSP-2126x/2136x/2137x Processors Interrupt Vector Table”
on page 5-22
“ADSP-2126x/2136x/2137x Processor Boot Streams” on
page 5-23
Power-Up Booting Process
ADSP-2126x, ADSP-2136x, and ADSP-2137x processors include a hardware
feature that boot-loads a small, 256-instruction, program into the
processor’s internal memory after power-up or after the chip reset. These
instructions come from a program called a boot kernel. When executed,
the boot kernel facilitates booting of user application code. The combination
of the boot kernel and application code comprise the boot-loadable
(.ldr) file.
At power-up, after the chip reset, the booting process includes the following
steps.
1. Based on the boot type, an appropriate DMA channel is automatically
configured for a 384-word (32-bit) transfer. This transfer
boot-loads the boot kernel program into the processor memory.
VisualDSP++ 4.5 Loader and Utilities Manual 5-3