VisualDSP++ 4.5 Loader and Utilities Manual - Analog Devices

ADSP-21161 Processor Booting
Table 4-6. DMA Channel 8 Parameter Register for SPI Port Boot
Parameter Register Initialization Value
IISRX 0x0004 0000
IMSRX Uninitialized (increment by 1 is automatic)
CSRX 0x0180 (256-instruction words)
GPSRX Uninitialized
No-Boot Mode
No-boot mode causes the processor to start fetching and executing
instructions at address 0x200004 in external memory space. In no-boot
mode, the processor does not boot-load and all DMA control and
parameter registers are set to their default initialization values.The loader
utility does not produce the code for no-boot execution.
ADSP-21161 Processor Boot Kernels
The boot-loading process starts with a transfer of the boot kernel program
into the processor memory. The boot kernel sets up the processor and
loads boot data. After the boot kernel finishes initializing the rest of the
system, the boot kernel loads boot data over itself with a final DMA
transfer.
Four boot kernels ship with VisualDSP++; refer to Table 4-7.
Table 4-7. ADSP-21161 Default Boot Kernel Files
PROM Booting Link Booting Host Booting SPI Booting
161_prom.dxe 161_link.dxe 161_host.dxe 161_spi.dxe
Boot kernels are loaded at processor reset into the seg_ldr memory segment,
which is defined in the 161_ldr.ldf. The file is stored in the
processor tools installation directory, …\211xx\ldr.
4-16 VisualDSP++ 4.5 Loader and Utilities Manual