ATtiny9 Atmel Corporation, ATtiny9 Datasheet - Page 33

• Manufacturer Part Number: ATtiny9
• Manufacturer: Atmel Corporation

Specifications of ATtiny9

• Flash (kbytes): 1 Kbytes
• Pin Count: 6
• Max. Operating Frequency: 12 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 1
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 4
• Ext Interrupts: 4
• Usb Speed: No
• Usb Interface: No
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 0.03
• Self Program Memory: NO
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 125
• I/o Supply Class: 1.8 to 5.5
• Operating Voltage (vcc): 1.8 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 1
• Output Compare Channels: 2
• Input Capture Channels: 1
• Pwm Channels: 2
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

8127E–AVR–11/11
Watchdog System Reset mode. If the interrupt is not executed before the next time-out, a Sys-
tem Reset will be applied.
Table 8-2.
Note:
• Bit 4 – Res: Reserved Bit
This bit is reserved and will always read zero.
• Bit 3 – WDE: Watchdog System Reset Enable
WDE is overridden by WDRF in RSTFLR. This means that WDE is always set when WDRF is
set. To clear WDE, WDRF must be cleared first. This feature ensures multiple resets during con-
ditions causing failure, and a safe start-up after the failure.
WDTON
1
1
1
1
0
1. WDTON configuration bit set to “0“ means programmed and “1“ means unprogrammed.
(1)
Watchdog Timer Configuration
WDE
0
0
1
1
x
WDIE
0
1
0
1
x
Mode
Stopped
Interrupt Mode
System Reset Mode
Interrupt and System
Reset Mode
System Reset Mode
Action on Time-out
None
Interrupt
Reset
Interrupt, then go to
System Reset Mode
Reset
ATtiny4/5/9/10
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