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ATmega324P 데이터시트(PDF) 278 Page - ATMEL Corporation

부품명 ATmega324P
상세설명  8-bit Microcontroller with 16/32/64K Bytes In-System Programmable Flash
PDF  377 Pages
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제조업체  ATMEL [ATMEL Corporation]
홈페이지  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega324P 데이터시트(HTML) 278 Page - ATMEL Corporation

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278
7674F–AVR–09/09
ATmega164P/324P/644P
23.8
Register Description
23.8.1
MCUCR – MCU Control Register
The MCU Control Register contains control bits for general MCU functions.
• Bits 7 – JTD: JTAG Interface Disable
When this bit is zero, the JTAG interface is enabled if the JTAGEN Fuse is programmed. If this
bit is one, the JTAG interface is disabled. In order to avoid unintentional disabling or enabling of
the JTAG interface, a timed sequence must be followed when changing this bit: The application
software must write this bit to the desired value twice within four cycles to change its value. Note
that this bit must not be altered when using the On-chip Debug system.
23.8.2
MCUSR – MCU Status Register
The MCU Status Register provides information on which reset source caused an MCU reset.
• Bit 4 – JTRF: JTAG Reset Flag
This bit is set if a reset is being caused by a logic one in the JTAG Reset Register selected by
the JTAG instruction AVR_RESET. This bit is reset by a Power-on Reset, or by writing a logic
zero to the flag.
Bit
7
65
43
21
0
0x35 (0x55)
JTD
BODS
BODSE
PUD
–
–
IVSEL
IVCE
MCUCR
Read/Write
R/W
R
R
R/W
R
R
R/W
R/W
Initial Value
0
0
0
0
0
0
0
0
Bit
765
432
10
0x34 (0x54)
–
–
–JTRF
WDRF
BORF
EXTRF
PORF
MCUSR
Read/Write
R
R
R
R/W
R/W
R/W
R/W
R/W
Initial Value
0
0
0
See Bit Description



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