DOC7707 datasheet(58/307 Pages) ETC1

部品番号	DOC7707

部品情報	Microcontroller with 8/16K Bytes of ISP Flash and USB Controller

PDF	307 Pages

Scroll/Zoom	100%

メーカー	ETC1 [List of Unclassifed Manufacturers]

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7707F–AVR–11/10

AT90USB82/162

• Bit 7-4 - Reserved bits

These bits are reserved and will always read as zero.

• Bit 3 - WDEWIF: Watchdog Early Warning Interrupt Flag

This bit is set when a first time-out occurs in the Watchdog Timer and if the WDEWIE bit is

enabled. WDEWIF is automatically cleared by hardware when executing the corresponding

interrupt handling vector. Alternatively, WDIF can be cleared by writing a logic one to the flag.

When the I-bit in SREG and WDEWIE are set, the Watchdog Time-out Interrupt is executed.

• Bit 2 - WDEWIE: Watchdog Early Warning Interrupt Enable

When this bit has been set by software, an interrupt will be generated on the watchdog interrupt

vector when the Early warning flag is set to one by hardware.

• Bit 1:0 - WCLKD[1:0]: Watchdog Timer Clock Divider

– WCLKD = 0 : Clk

WDT = Clk128k

– WCLKD = 1 : Clk

WDT = Clk128k / 3

– WCLKD = 2 : Clk

WDT = Clk128k / 5

– WCLKD = 3 : Clk

WDT = Clk128k / 7

DOC7707 データシート(PDF) 58 Page - List of Unclassifed Manufacturers