ATTIny2313-16MI ATMEL Corporation, ATTIny2313-16MI Datasheet - Page 34

• Manufacturer Part Number: ATTIny2313-16MI
• Description: 8-bit AVR Microcontroller with 2K Bytes In-System Programmable Flash
• Manufacturer: ATMEL Corporation

Power-on Reset
34
ATtiny2313/V
Table 15. Reset Characteristics
Notes:
A Power-on Reset (POR) pulse is generated by an On-chip detection circuit. The detec-
tion level is defined in Table 15. The POR is activated whenever V
detection level. The 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. Reach-
ing the Power-on Reset threshold voltage invokes the delay counter, which determines
how long the device is kept in RESET after V
again, without any delay, when V
Figure 15. MCU Start-up, RESET Tied to V
INTERNAL
Symbol
TIME-OUT
V
V
t
RST
RESET
POT
RST
RESET
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
(falling)
Power-on Reset
Threshold Voltage
(rising)
Power-on Reset
Threshold Voltage
(falling)
Voltage
Minimum pulse width
on RESET Pin
RESET Pin Threshold
Parameter
(2)
V
V
POT
RST
t
TOUT
CC
V
V
T
T
decreases below the detection level.
CC
CC
A
A
Condition
= -40 - 85 C
= -40 - 85 C
= 1.8 - 5.5V
= 1.8 - 5.5V
CC
CC
rise. The RESET signal is activated
0.1 V
Min
(1)
CC
Typ
1.2
1.1
(1)
0.9 V
CC
Max
2.5
2543C–AVR–12/03
is below the
(1)
CC
Units
µs
V
V
V
POT