ATTINY26L8SU SL383 Atmel, ATTINY26L8SU SL383 Datasheet - Page 33
![no-image](/images/manufacturer_photos/0/0/78/atmel_sml.jpg)
ATTINY26L8SU SL383
Manufacturer Part Number
ATTINY26L8SU SL383
Description
MCU 8-Bit ATtiny AVR RISC 2KB Flash 3.3V/5V 20-Pin SOIC T/R
Manufacturer
Atmel
Datasheet
1.ATTINY26L8PU.pdf
(185 pages)
- Current page: 33 of 185
- Download datasheet (3Mb)
System Control and
Reset
1477J–AVR–06/07
The ATtiny26(L) provides four sources of reset:
•
•
•
•
During reset, all I/O Registers are then set to their initial values, and the program starts
execution from address $000. The instruction placed in address $000 must be an RJMP
– Relative Jump – instruction to the reset handling routine. If the program never enables
an interrupt source, the interrupt vectors are not used, and regular program code can be
placed at these locations. Figure 25 shows the reset logic for the ATtiny26(L). Table 16
shows the timing and electrical parameters of the reset circuitry for ATtiny26(L).
Figure 25. Reset Logic for the ATtiny26(L)
BODLEVEL
Power-on Reset. The MCU is reset when the supply voltage is below the Power-on Reset
threshold (V
External Reset. To use the PB7/RESET pin as an External Reset, instead of I/O pin,
unprogram (“1”) the RSTDISBL Fuse. The MCU is reset when a low level is present on the
RESET pin for more than 500 ns.
Watchdog Reset. The MCU is reset when the Watchdog timer period expires and the
Watchdog is enabled.
Brown-out Reset. The MCU is reset when the supply voltage V
Reset threshold (V
BODEN
POT
).
BOT
CKSEL[3:0]
).
Reset Circuit
Brown-Out
Generator
Clock
CK
Register (MCUSR)
MCU Status
DATA BUS
Delay Counters
CC
is below the Brown-out
ATtiny26(L)
TIMEOUT
33
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