ATTINY12V-1PC Atmel, ATTINY12V-1PC Datasheet - Page 28
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ATTINY12V-1PC
Manufacturer Part Number
ATTINY12V-1PC
Description
IC AVR MCU 1MHZ 1.8V 8DIP
Manufacturer
Atmel
Series
AVR® ATtinyr
Specifications of ATTINY12V-1PC
Core Processor
AVR
Core Size
8-Bit
Speed
1.2MHz
Peripherals
POR, WDT
Number Of I /o
6
Program Memory Size
1KB (512 x 16)
Program Memory Type
FLASH
Eeprom Size
64 x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°C
Package / Case
8-DIP (0.300", 7.62mm)
Data Bus Width
8 bit
Maximum Clock Frequency
8 MHz
Number Of Programmable I/os
6
Number Of Timers
1
Operating Supply Voltage
1.8 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
Through Hole
Minimum Operating Temperature
- 55 C
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Ram Size
-
Data Converters
-
Connectivity
-
Lead Free Status / Rohs Status
No
Other names
ATTINY12V1PC
Watchdog Reset
Register Description
MCU Status Register –
MCUSR of the ATtiny11
28
ATtiny11/12
When the Watchdog times out, it will generate a short reset pulse of 1 CK cycle dura-
tion. On the falling edge of this pulse, the delay timer starts counting the Time-out period
(t
Figure 21. Watchdog Reset during Operation
The MCU Status Register provides information on which reset source caused an MCU
reset.
• Bit 7..2 - Res: Reserved Bits
These bits are reserved bits in the ATtiny11 and always read as zero.
• Bit 1 - EXTRF: EXTernal Reset Flag
After a power-on reset, this bit is undefined (X). It will be set by an external reset. A
watchdog reset will leave this bit unchanged.
• Bit 0 - PORF: Power-on Reset Flag
This bit is set by a power-on reset. A watchdog reset or an external reset will leave this
bit unchanged.
To summarize, the following table shows the value of these two bits after the three
modes of reset.
Table 12. PORF and EXTRF Values after Reset
Bit
$34
Read/Write
Initial Value
TOUT
Reset Source
Power-on
External Reset
Watchdog Reset
). Refer to page 43 for details on operation of the Watchdog.
V
CC
R
7
0
-
R
6
0
-
R
5
0
-
CK
R
4
0
-
Unchanged
Undefined
EXTRF
1
R
3
0
-
2
R
0
-
EXTRF
See bit description
R/W
1
Unchanged
Unchanged
PORF
PORF
R/W
1
1006F–AVR–06/07
0
MCUSR