atmega323l ATMEL Corporation, atmega323l Datasheet - Page 30
atmega323l
Manufacturer Part Number
atmega323l
Description
Atmega323 8-bit Avr Microcontroller With 32k Bytes Of In-system Programmable Flash
Manufacturer
ATMEL Corporation
Datasheet
1.ATMEGA323L.pdf
(247 pages)
- Current page: 30 of 247
- Download datasheet (4Mb)
Watchdog Reset
MCU Control and Status
Register – MCUCSR
30
ATmega323(L)
Figure 28. Brown-out Reset During Operation
The hysteresis on V
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 29. Watchdog Reset During Operation
The MCU Control and Status Register contains control bits for general MCU functions,
and provides information on which reset source caused an MCU Reset.
• Bit 7 – JTD: JTAG Interface Disable
When this bit is cleared (zero), the JTAG interface is enabled if the JTAGEN Fuse is
programmed. If this bit is set (one), the JTAG interface is disabled. To avoid uninten-
tional disabling of the JTAG interface, the user software must write this bit as one twice
within four cycles to set the bit.
If the JTAG interface is left unconnected to other JTAG circuitry, the JTD bit should be
set to one. The reason for this is to avoid static current at the TDO pin in the JTAG
interface.
TOUT
Bit
$34 ($54)
Read/Write
Initial Value
. Refer to page 64 for details on operation of the Watchdog Timer.
INTERNAL
TIME-OUT
RESET
RESET
JTD
R/W
V
7
0
CC
BOT
ISC2
R/W
6
0
: V
BOT+
= V
R
5
–
0
V
BOT
CK
BOT-
JTRF
+ 25 mV, V
R/W
4
WDRF
R/W
3
BOT-
See Bit Description
= V
BORF
R/W
2
BOT
V
t
TOUT
BOT+
- 25 mV
EXTRF
R/W
1
PORF
R/W
0
1457G–AVR–09/03
MCUCSR
Related parts for atmega323l
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Low-Voltage Voice-Switched IC for Hands-Free Operation
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
AM-FM Receiver IC U4255BM-M
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Monolithic Integrated Feature Phone Circuit
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Multistandard Video-IF and Quasi Parallel Sound Processing
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
High-performance EE PLD
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
8-bit Flash Microcontroller
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
2-Wire Serial EEPROM
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
U6046BREAR WINDOW HEATING TIMER / LONG-TERM TIMER
Manufacturer:
ATMEL Corporation
Datasheet: