Digital Photo Keychain User Manual

STOP PROCESSING STATE
7 - 42 PROCESSING STATES MOTOROLA
INTERRUPT CONTROL CYCLE 1
INTERRUPT CONTROL CYCLE 2
FETCH n3 n4 — — nop nA nB nC nD nE
DECODE n2 STOP — — nop nop nA nB nC nD
EXECUTE n1 n2 STOP — nop nop nop nA nB nC
STOP CYCLE COUNT 1234
IRESET = INTERRUPT
n = NORMAL INSTRUCTION WORD
nA, nB, nC = INSTRUCTIONS IN RESET ROUTINE
STOP = INTERRUPT INSTRUCTION WORD
RESET
CLOCK STOPPED
PROCESSOR LEAVES RESET STATE
PROCESSOR ENTERS
RESET STATE
Figure 7-19 STOP Instruction Sequence Recovering with RESET