ATtiny167 Atmel Corporation, ATtiny167 Datasheet - Page 52

• Manufacturer Part Number: ATtiny167
• Manufacturer: Atmel Corporation

Specifications of ATtiny167

• Flash (kbytes): 16 Kbytes
• Pin Count: 20
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 8
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 16
• Ext Interrupts: 16
• Usb Speed: No
• Usb Interface: No
• Spi: 2
• Twi (i2c): 1
• Uart: 1
• Lin: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 11
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 0.5
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8 to 5.5
• Operating Voltage (vcc): 1.8 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 3
• Input Capture Channels: 1
• Pwm Channels: 9
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

6.1.6
6.1.7
52
ATtiny87/ATtiny167
Watchdog System Reset
MCUSR – MCU Status Register
Figure 6-5.
When the Watchdog times out, it will generate a short reset pulse of one CK cycle duration.
On the falling edge of this pulse, the delay timer starts counting the Time-out period t
Refer to
Figure 6-6.
The MCU Status Register provides information on which reset source caused an MCU reset.
• Bits 7:4 – Res: Reserved Bits
These bits are reserved bits in the ATtiny87/167 and will always read as zero.
• Bit 3 – WDRF: Watchdog System Reset Flag
This bit is set if a Watchdog System Reset occurs. The bit is reset by a Power-on Reset, or by
writing a logic zero to the flag.
• Bit 2 – BORF: Brown-out Reset Flag
This bit is set if a Brown-out Reset occurs. The bit is reset by a Power-on Reset, or by writing
a logic zero to the flag.
Bit
0x34 (0x54)
Read/Write
Initial Value
page 53
CC
INTERNAL
TIME-OUT
Brown-out Reset During Operation
Watchdog System Reset During Operation
RESET
RESET
R
7
–
0
for details on operation of the Watchdog Timer.
V
CC
6
–
R
0
R
5
–
0
V
CK
BOT-
R
4
–
0
WDRF
R/W
3
V
t
TOUT
BORF
See Bit Description
BOT+
R/W
2
EXTRF
R/W
1
PORF
R/W
8265B–AVR–09/10
0
MCUSR
TOUT
.