ata6616 ATMEL Corporation, ata6616 Datasheet - Page 75

• Manufacturer Part Number: ata6616
• Description: Microcontroller With Lin Transceiver, 5v Regulator And Watchdog
• Manufacturer: ATMEL Corporation

4.7.1.5
9132A–AUTO–10/08
DRAFT
Brown-out Detection
Figure 4-19. External Reset During Operation
ATtiny167 has an On-chip Brown-out Detection (BOD) circuit for monitoring the Vcc level during
operation by comparing it to a fixed trigger level. The trigger level for the BOD can be selected
by the BODLEVEL Fuses
spike free Brown-out Detection. The hysteresis on the detection level should be interpreted as
V
When the BOD is enabled, and Vcc decreases to a value below the trigger level (V
4-20), the Brown-out Reset is immediately activated. When Vcc increases above the trigger level
(V
expired.
The BOD circuit will only detect a drop in Vcc if the voltage stays below the trigger level for lon-
ger than t
Figure 4-20. Brown-out Reset During Operation
BOT
BOT
+
+
= V
in
CC
BOD
BOT
Figure
INTERNAL
TIME-OUT
given in
+ V
RESET
RESET
HYST
4-20), the delay counter starts the MCU after the Time-out period t
V
CC
/ 2 and V
Table 4-85 on page
(Table 4-84 on page
BOT
ATA6616/ATA6617 [Preliminary]
–
= V
V
BOT-
BOT
271.
- V
HYST
271). The trigger level has a hysteresis to ensure
/ 2.
V
t
TOUT
BOT+
BOT
–
TOUT
in
Figure
has
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