Rainbow Electronics ATtiny12 - Manual (Page 19)

19
ATtiny11/12
1006C–09/01
Figure 17. Reset Logic for the ATtiny12
Note: 1. The Power-on Reset will not work unless the supply voltage has been below V
POT
(falling).
Table 8. Reset Characteristics for the ATtiny12
Symbol Parameter Condition Min Typ Max Units
V
POT
(1)
Power-on Reset Threshold
Voltage (rising)
BOD disabled 1.0 1.4 1.8 V
BOD enabled 0.6 1.2 1.8 V
Power-on Reset Threshold
Voltage (falling)
BOD disabled 0.4 0.6 0.8 V
BOD enabled 0.6 1.2 1.8 V
V
RST
RESET Pin Threshold
Voltage
0.6V
CC
V
V
BOT
Brown-out Reset Threshold
Voltage
(BODLEVEL = 1) 1.5 1.8 1.9
V
(BODLEVEL = 0) 2.6 2.7 2.8
MCU Status
Register (MCUSR)
Brown-out
Reset Circuit
BODEN
BODLEVEL
Delay Counters
CKSEL[3:0]
CK
Full
WDRF BORF
EXTRF
PORF
DATA BUS
Power-on Reset
Circuit
On-chip
RC Oscillator