AT75C datasheet(44/171 Pages) ATMEL

44 / 171 page

AT75C DSP Subsystem

1368C–INTAP–08/02

break, the contents of lc will be the value of the loop counter at the

break point.

The minimum length of the repeated block is two words.

Restrictions:

• Break cannot start at the last address of the block repeat loop.

• The following instructions cannot start at

address – 1 in a block-repeat

loop:

break (1 word), mov soperand (2 words), icr, mov icr, ab (2 words).

• The following instructions cannot start at the two last addresses of the

block-repeat loop:

br, brr, call, callr, calla, ret, reti, rets, retd, retid, bkrep,

rep, instructions with pc or lc as destination, instructions with lc or icr as

source.

• The following instructions cannot start at

address – 2 of a block-repeat

loop: instructions with lc as destination,

mov soperand, icr.

• The following instructions cannot start at

address – 3 of a block-repeat

loop:

set, rst, chng, addv, subv, with lc as destination.

• Note that illegal instruction sequences are also restricted at the last

and first instructions of a

block-repeat loop.

• Two

block-repeat loops cannot have the same last address.

AT75C Datasheet(PDF) 44 Page - ATMEL Corporation