ATEMGA128L View Datasheet(PDF) - Atmel Corporation
Part Name
Description
MFG CO.
'ATEMGA128L' PDF : 395 Pages View PDF
Figure 22. Reset Logic
PEN
DQ
LQ
Pull-up Resistor
Power-On Reset
Circuit
BODEN
BODLEVEL
RESET
Pull-up Resistor
SPIKE
FILTER
DATA BUS
MCU Control and Status
Register (MCUCSR)
Brown-Out
Reset Circuit
Reset Circuit
JTAG Reset
Register
Watchdog
Timer
Watchdog
Oscillator
Clock
CK
Generator
CKSEL[3:0]
SUT[1:0]
Delay Counters
TIMEOUT
Table 19. Reset Characteristics
Symbol Parameter
Condition
Min Typ Max Units
VPOT
Power-on Reset
Threshold Voltage
(rising)
Power-on Reset
Threshold Voltage
(falling)(1)
1.4
2.3
V
1.3
2.3
V
VRST
RESET Pin Threshold
Voltage
0.2 VCC
0.85 VCC
V
tRST
Pulse width on RESET
Pin
1.5
µs
Brown-out Reset
BODLEVEL = 1 2.4
2.6
2.9
VBOT Threshold Voltage(2)
BODLEVEL = 0 3.7
4.0
4.5
V
Minimum low voltage
BODLEVEL = 1
2
µs
tBOD
period for Brown-out
Detection
BODLEVEL = 0
2
µs
VHYST
Brown-out Detector
hysteresis
100
mV
Notes: 1. The Power-on Reset will not work unless the supply voltage has been below VPOT
(falling)
50 ATmega128
2467O–AVR–10/06
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