dsp56800 Freescale Semiconductor, Inc, dsp56800 Datasheet - Page 132

• Manufacturer Part Number: dsp56800
• Description: 16-bit Digital Signal Controllers
• Manufacturer: Freescale Semiconductor, Inc

Program Controller
The reason that nesting of hardware DO loops is supported is to provide for faster interrupt servicing.
When hardware DO loops are not nested, a second hardware stack location is left available for immediate
use by an interrupt service routine.
5.3.4
Terminating a DO Loop
A DO loop normally terminates when it has completed the last instruction of a loop for the last iteration of
the loop (LC equals one). Two techniques for early termination of the DO loops are presented in
Section 8.6.6, “Early Termination of a DO Loop,” on page 8-25.
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DSP56800 Family Manual
Freescale Semiconductor