AT90CAN32 Automotive Atmel Corporation, AT90CAN32 Automotive Datasheet - Page 55

• Manufacturer Part Number: AT90CAN32 Automotive
• Manufacturer: Atmel Corporation

Specifications of AT90CAN32 Automotive

• Flash (kbytes): 32 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 53
• Ext Interrupts: 8
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Uart: 2
• Can: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 2
• Eeprom (bytes): 1024
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 125
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 4
• Output Compare Channels: 8
• Input Capture Channels: 2
• Pwm Channels: 7
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

7.1.6
7.1.7
7682C–AUTO–04/08
Watchdog Reset
MCU Status Register – MCUSR
When the BOD is enabled, and V
7-5), the Brown-out Reset is immediately activated. When V
(V
expired.
The BOD circuit will only detect a drop in V
longer than t
Figure 7-5.
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
page 57
Figure 7-6.
The MCU Status Register provides information on which reset source caused an MCU reset.
Bit
Read/Write
Initial Value
BOT+
in
for details on operation of the Watchdog Timer.
Figure
BOD
Brown-out Reset During Operation
Watchdog Reset During Operation
CC
R
7
–
0
given in
INTERNAL
TIME-OUT
7-5), the delay counter starts the MCU after the Time-out period t
RESET
RESET
V
CC
R
6
–
0
Table
7-1.
R
5
–
0
CC
decreases to a value below the trigger level (V
JTRF
R/W
4
V
CK
BOT-
CC
WDRF
if the voltage stays below the trigger level for
R/W
3
See Bit Description
BORF
R/W
2
AT90CAN32/64/128
CC
increases above the trigger level
EXTRF
R/W
1
V
t
TOUT
BOT+
PORF
R/W
0
MCUSR
TOUT
BOT-
. Refer to
TOUT
in
Figure
has
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