參數(shù)資料
型號: MB91F267NAPMC-GSE1
廠商: Fujitsu Semiconductor America Inc
文件頁數(shù): 36/53頁
文件大小: 0K
描述: IC MCU FLASH 128KB FLASH 64LQFP
標準包裝: 1
系列: FR MB91265A
核心處理器: FR60Lite RISC
芯體尺寸: 32-位
速度: 33MHz
連通性: CAN,UART/USART
外圍設(shè)備: DMA,WDT
輸入/輸出數(shù): 49
程序存儲器容量: 128KB(128K x 8)
程序存儲器類型: 閃存
RAM 容量: 4K x 8
電壓 - 電源 (Vcc/Vdd): 4 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 11x8/10b
振蕩器型: 外部
工作溫度: -40°C ~ 105°C
封裝/外殼: 64-LQFP
包裝: 托盤
配用: 865-1102-ND - BOARD EVAL RS232 100QFP
其它名稱: 865-1091
44
8183F–AVR–06/12
ATtiny24A/44A/84A
8.5
Register Description
8.5.1
MCUSR – MCU Status Register
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 ATtiny24A/44A/84A and will always read as zero.
Bit 3 – WDRF: Watchdog Reset Flag
This bit is set if a Watchdog 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 1 – EXTRF: External Reset Flag
This bit is set if an External Reset occurs. The bit is reset by a Power-on Reset, or by writing a
logic zero to the flag.
Bit 0 – PORF: Power-on Reset Flag
This bit is set if a Power-on Reset occurs. The bit is reset only by writing a logic zero to the flag.
To make use of the Reset Flags to identify a reset condition, the user should read and then reset
the MCUSR as early as possible in the program. If the register is cleared before another reset
occurs, the source of the reset can be found by examining the Reset Flags.
8.5.2
WDTCSR – Watchdog Timer Control and Status Register
Bit 7 – WDIF: Watchdog Timeout Interrupt Flag
This bit is set when a time-out occurs in the Watchdog Timer and the Watchdog Timer is config-
ured 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 Timeout Interrupt Enable
When this bit is written to one, WDE is cleared, and the I-bit in the Status Register is set, the
Watchdog Time-out Interrupt is enabled. In this mode the corresponding interrupt is executed
instead of a reset if a timeout in the Watchdog Timer occurs.
If WDE is set, WDIE is automatically cleared by hardware when a time-out occurs. This is useful
for keeping the Watchdog Reset security while using the interrupt. After the WDIE bit is cleared,
Bit
7
6
543210
WDRF
BORF
EXTRF
PORF
MCUSR
Read/Write
RRRR
R/W
Initial Value
0
See Bit Description
Bit
765
432
10
WDIF
WDIE
WDP3
WDCE
WDE
WDP2
WDP1
WDP0
WDTCSR
Read/Write
R/W
Initial Value
0
X
0
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