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W551C040 Datasheet(PDF) 9 Page - Winbond |
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W551C040 Datasheet(HTML) 9 Page - Winbond |
9 / 15 page W551Cxxx Data Sheet Winbond Electronics Corp. 8 Release Date: January 2, 2001 3.3 W551Cxxx Self-test Mode In normal read mode, the TEST pin is internally pulled high, and the TEST_OUT pin is in logic ' 1 ' state. When the TEST pin is pulled low, the W551Cxxx enters the "self-test mode". In this mode, the self-test process is started at the falling edge of the TEST signal. The self-test process accumulates each byte (8 bit) of voice memory content from address 00000h to 7FFFFh. If the accumulated result is 00h, a logic ' 0 ' will be output from TEST_OUT pin. Or else, a logic ' 1 ' signal will be output from TEST_OUT pin. TEST TEST _OUT TEST _OUT TTEST For "Correct" result For "Incorrect" result End of test |
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