ATA6602-PLQW ATMEL [ATMEL Corporation], ATA6602-PLQW Datasheet - Page 68

• Manufacturer Part Number: ATA6602-PLQW
• Description: Microcontroller with LIN Transceiver, 5V Regulator and Watchdog
• Manufacturer: ATMEL [ATMEL Corporation]

4.8.4
4.8.5
68
ATA6602/ATA6603
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 4-18. External Reset During Operation
ATA6602/ATA6603 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 4-21.
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 ATA6602V/ATA6603V, 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 4-117 on page
BOT-
= V
Table 4-20 on page
BOT
V
RST
- V
TOUT
ATA6602/ATA6603
HYST
– has expired. The External Reset can be disabled by the
Min V
(1)
/2.
RST
299.
t
TOUT
BOT
– on its positive edge, the delay counter starts the
67) 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
BOT
Reserved
during the production test. This guar-
Max V
BOT
4921C–AUTO–01/07
Units
BOT+
V
CC
=