ATA6602-PLQW ATMEL [ATMEL Corporation], ATA6602-PLQW Datasheet - Page 67

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

4.8.3
4921C–AUTO–01/07
Power-on Reset
Table 4-20.
Notes:
A Power-on Reset (POR) pulse is generated by an On-chip detection circuit. The detection level
is defined in
POR circuit can be used to trigger the start-up Reset, as well as to detect a failure in supply
voltage.
A Power-on Reset (POR) circuit ensures that the device is reset from Power-on. Reaching the
Power-on Reset threshold voltage invokes the delay counter, which determines how long the
device is kept in RESET after V
when V
Figure 4-16. MCU Start-up, RESET Tied to V
Figure 4-17. MCU Start-up, RESET Extended Externally
Symbol
INTERNAL
RESET
INTERNAL
TIME-OUT
TIME-OUT
V
V
t
RST
POT
RST
RESET
RESET
RESET
V
V
CC
1. Values are guidelines only. Actual values are TBD.
2. The Power-on Reset will not work unless the supply voltage has been below V
CC
CC
decreases below the detection level.
Parameter
Power-on Reset Threshold Voltage
(rising)
Power-on Reset Threshold Voltage
(falling)
Minimum pulse width on RESET Pin
RESET Pin Threshold Voltage
Table
Reset Characteristics
(2)
4-20. The POR is activated whenever V
V
V
V
POT
POT
RST
CC
t
TOUT
rise. The RESET signal is activated again, without any delay,
(1)
V
CC
RST
t
TOUT
Condition
ATA6602/ATA6603
CC
is below the detection level. The
TBD
TBD
Min
0.1
TBD
TBD
Typ
Max
TBD
TBD
POT
0.9
2.5
(falling)
Units
µs
V
V
V
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