ATTINY167-15MZ Atmel, ATTINY167-15MZ Datasheet - Page 57
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ATTINY167-15MZ
Manufacturer Part Number
ATTINY167-15MZ
Description
MCU AVR 16K FLASH 15MHZ 32-QFN
Manufacturer
Atmel
Series
AVR® ATtinyr
Datasheet
1.ATTINY167-15MD.pdf
(283 pages)
Specifications of ATTINY167-15MZ
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
I²C, LIN, SPI, UART/USART, USI
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number Of I /o
16
Program Memory Size
16KB (8K x 16)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 11x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
For Use With
ATSTK600-SOIC - STK600 SOCKET/ADAPTER FOR SOIC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATTINY167-15MZ
Manufacturer:
ATMEL
Quantity:
670
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6.3.3
7728G–AVR–06/10
Watchdog Timer Control Register - WDTCR
• Bit 7 - WDIF: Watchdog Interrupt Flag
This bit is set when a time-out occurs in the Watchdog Timer and the Watchdog Timer is con-
figured for interrupt. WDIF is cleared by hardware when executing the corresponding interrupt
handling vector. Alternatively, WDIF is cleared by writing a logic one to the flag. When the I-bit
in SREG and WDIE are set, the Watchdog Time-out Interrupt is executed.
• Bit 6 - WDIE: Watchdog Interrupt Enable
When this bit is written to one and the I-bit in the Status Register is set, the Watchdog Interrupt
is enabled. If WDE is cleared in combination with this setting, the Watchdog Timer is in Inter-
rupt Mode, and the corresponding interrupt is executed if time-out in the Watchdog Timer
occurs.
If WDE is set, the Watchdog Timer is in Interrupt and System Reset Mode. The first time-out in
the Watchdog Timer will set WDIF. Executing the corresponding interrupt vector will clear
WDIE and WDIF automatically by hardware (the Watchdog goes to System Reset Mode). This
is useful for keeping the Watchdog Timer security while using the interrupt. To stay in Interrupt
and System Reset Mode, WDIE must be set after each interrupt. This should however not be
done within the interrupt service routine itself, as this might compromise the safety-function of
the Watchdog System Reset mode. If the interrupt is not executed before the next time-out, a
System Reset will be applied.
If the Watchdog Timer is used as clock monitor (c.f.
trol Bits 3 - 0” on page
automatically disabled.
Table 6-1.
Note:
• Bit 4 - WDCE: Watchdog Change Enable
This bit is used in timed sequences for changing WDE and prescaler bits. To clear the WDE
bit, and/or change the prescaler bits, WDCE must be set.
Once written to one, hardware will clear WDCE after four clock cycles.
Bit
Read/Write
Initial Value
Monitor
Clock
On
Off
x
1. At least one of these three enables (WDTON, WDE & WDIE) equal to 1.
WDTON
Watchdog Timer Configuration
WDIF
R/W
y
0
0
0
0
1
7
0
(1)
WDIE
WDE
40), the System Reset Mode is enabled and the Interrupt Mode is
R/W
y
0
0
1
1
x
6
0
(1)
WDIE Mode
WDP3
y
0
1
0
1
x
R/W
(1)
5
0
Stopped
System Reset Mode
Interrupt Mode
System Reset Mode
Interrupt and System Reset
Mode
System Reset Mode
WDCE
R/W
0
4
WDE
R/W
Section • “Bits 3:0 – CLKC3:0: Clock Con-
3
X
ATtiny87/ATtiny167
WDP2
R/W
2
0
Action on Time-out
None
Reset
Interrupt
Reset
Interrupt, then go to System
Reset Mode
Reset
WDP1
R/W
1
0
WDP0
R/W
0
0
WDTCR
57
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