ATA6613 ATMEL Corporation, ATA6613 Datasheet - Page 71
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ATA6613
Manufacturer Part Number
ATA6613
Description
Ata6613
Manufacturer
ATMEL Corporation
Datasheet
1.ATA6613.pdf
(362 pages)
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6.8.4
6.8.5
9111C–AUTO–02/08
External Reset
Brown-out Detection
An External Reset is generated by a low level on the RESET pin. Reset pulses longer than the
minimum pulse width (see
running. Shorter pulses are not guaranteed to generate a reset. When the applied signal
reaches the Reset Threshold Voltage – V
MCU after the Time-out period – t
RSTDISBL fuse, see
Figure 6-18. External Reset During Operation
ATA6612/ATA6613 has an On-chip Brown-out Detection (BOD) circuit for monitoring the V
level during operation by comparing it to a fixed trigger level. The trigger level for the BOD can
be selected by the BODLEVEL Fuses. The trigger level has a hysteresis to ensure spike free
Brown-out Detection. The hysteresis on the detection level should be interpreted as V
V
Table 6-21.
Notes:
BOT
TIME-OUT
INTERNAL
RESET
RESET
+ V
BODLEVEL 2..0 Fuses
V
1. V
HYST
CC
this is the case, the device is tested down to V
antees that a Brown-Out Reset will occur before V
operation of the microcontroller is no longer guaranteed. The test is performed using
BODLEVEL = 110 and BODLEVEL = 101 for ATA6612V/ATA6613V, and BODLEVEL = 101
and BODLEVEL = 101 for
BOT
/2 and V
BODLEVEL Fuse Coding
may be below nominal minimum operating voltage for some devices. For devices where
111
110
101
100
011
010
001
000
Table 6-117 on page
BOT-
= V
Table 6-20 on page
BOT
V
RST
- V
TOUT
ATA6612/ATA6613
HYST
– has expired. The External Reset can be disabled by the
Min V
(1)
/2.
RST
302.
t
TOUT
BOT
– on its positive edge, the delay counter starts the
70) will generate a reset, even if the clock is not
CC
.
= V
Typ V
CC
1.8
2.7
4.3
BOT
drops to a voltage where correct
BOD Disabled
ATA6612/ATA6613
BOT
Reserved
during the production test. This guar-
Max V
BOT
Units
BOT+
V
CC
71
=
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