ADSP-214xx SHARC Processor Hardware Reference 23-43
System Design
Definition of Terms
Booting
When a processor is initially powered up, its internal SRAM and many
other registers are undefined. Before actual program execution can begin,
the application must be loaded from an external non-volatile source such
as flash memory or a host processor. This process is known as bootstrap
loading or booting and is automatically performed by the processor after
power-up or after a software reset.
Boot Kernel
The boot kernel is an executable file which schedules the entire boot pro-
cess. The temporary location of the kernel resides in the processor’s
Interrupt vector location (IVT). The IVT typically has a maximum size of
256 x 48 words. After booting, the kernel overwrites this area.
Figure 23-14. Reset Generator and Power Supply Monitor
RESET
IRQ0
IRQ1
FLAG0
GND
RESET
Vt=+1.25V
V
SENSE
V
DDEXT
PFI
MR
WDI
PFO
WDO
GND
4
1
6
5
8
3
ADM706TAR
VCC
2
RST
7
100nF
10μF
100nF
V
DDEXT
ADSP-214xx
S
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