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t1
t3
Parameter
Input Clock High Time
Input Clock Period
min
20
50
max units
nS
nS
XTAL1
t1
t4 Input Clock Frequency
100
t2 Input Clock Low Time
nS
t3
20
typ
10
t2
20 MHz
FIGURE 16 - TTL INPUT TIMING ON XTAL1 PIN
t1
Parameter
nRESET IN Pulse Width
min
3.2
max units
µS
nRESET IN
t1
t2
nINTR High to Next nINTR Low
nS
typ
200
t2
nINTR
FIGURE 17 - RESET AND INTERRUPT TIMING