Atmel ATA6264 - Manual (Page 52)

52
4929B–AUTO–01/07
ATA6264 [Preliminary]
Necessary for operation:
V
PERI
> Reset threshold, V
CORE
> Reset threshold
Operating conditions of all other supply pins:
V
K30
, V
EVZ
and V
VSAT
are within functional range limits, T
j
= –40°C to 150°C
Other pins:
As defined in
Section 4. ”Functional Range” on page 8 .
Table 16-2. Electrical Characteristics – Watchdog Function
No. Parameters Test Conditions Pin Symbol Min Typ. Max. Unit Type*
15.1 Oscillator frequency f
os
–5% 100 +5% kHz A
15.2
Power-up extension of RESQ
signal
RESQ t
RESQ
16 16 A
15.3
Start of first watchdog trigger
window after rising edge at
RESQ
t 12 12 A
15.4
Maximum width of first
watchdog-trigger window
t 8 8 A
15.5
Maximum time for prescaler
configuration after first
watchdog-trigger command
t 1 1 A
15.6 Programmed watchdog cycle
t
WD
as set by prescaler
(default 16 ms)
t
WD
t
WD
A
15.7
Start of programmed watchdog
window 75%
×
t
WD
75%
×
t
WD
A
15.8
Max. programmed window
duration 50%
×
t
WD
50%
×
t
WD
A
15.9
Time for RESQ = low after
watchdog timeout
(Missing watchdog trigger) RESQ t 16 16 A
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
100
f
os
----------
100
f
os
----------
100
f
os
----------
100
f
os
----------
100
f
os
----------