44
4929B–AUTO–01/07
ATA6264 [Preliminary]
Figure 15-4. Application Example
Necessary for operation:
VEVZ = 5.5V to 40V, VPERI = 1V to 5.5V, VINT = 3.7V to 5.47V
Operating conditions of all other supply pins:
VK30, VSAT, and VCORE are within functional range limits, Tj = –40°C to 150°C
Other pins:
As defined in Section 4. ”Functional Range” on page 8.
Table 15-1. Reset Truth Table
VPERI VCORE VEVZ WATCHDOG RESQ RESQ2
< 1V X X X Undefined (low
via resistor)
Undefined (low
via resistor)
1V to VVPERI = OK X X X Low Low
> VVPERI = OK
VVCORE = Not OK X X Low Low
VVCORE = OK EVZGOOD = high
(VEVZ = OK)
After startup
(no trigger has occurred) High Low
Correctly triggered
(trigger occurred 1st time) High Low -> high
Correctly triggered High High
Incorrectly triggered High -> low High -> low
XEVZGOOD = low
(VEVZ = Not OK) XLowLow
VEVZ
VCORE
VPERI
WD-logic Watchdog is
triggered
Other
peri
(3.3V)
Safety system
monitoring
microcontroller
(3.3V)
Microcontroller
dual voltage
supply
(1.88V, 3.3V)
VCORE is above
reset
"threshold" and
below overvoltage
VPERI is above
reset
"threshold" and
below overvoltage
VEVZ is above
reset
"threshold"
RESQ2
RESQ