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CDP1855CE 数据表(PDF) 11 Page - Intersil Corporation |
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CDP1855CE 数据表(HTML) 11 Page - Intersil Corporation |
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11 / 15 page  4-57 Y 3Y2Y1Z3Z2Z1 X 3X2X1 -------------------------------------------- Z 3Z2Z1 = Y 3Y2Y1 X 3X2X1 ---------------------- + FIGURE 5. CASCADING THREE MDU’s (CDP1855) IN AN 1800 SYSTEM WITH MDU’s BEING ACCESSED AS I/O PORTS IN PROGRAMMING EXAMPLE FIGURE 6. CASCADING FOUR MDU’s (CDP1855) C.I. ZR YR RA2 RA1 RA0 CTL CE CLR STB RD/ BUS CDP1855 C.O. ZL YL SHIFT CLK CN0 CN1 WE VDD DATA BUS C.I. ZR YR RA2 RA1 RA0 CTL CE CLR STB RD/ BUS CDP1855 C.O. ZL YL SHIFT CLK CN0 CN1 WE VDD C.I. ZR YR RA2 RA1 RA0 CTL CE CLR STB RD/ BUS CDP1855 O.F. ZL YL SHIFT CLK CN0 CN1 WE VDD VDD EF1 BUS MRD TPB CLEAR N2 N1 N0 MOST SIGNIFICANT LEAST SIGNIFICANT OR VDD I/O SELECT 88 8 CLOCK 8 TO CPU C.I. ZR YR RA2 RA1 RA0 CTL CE CLR STB RD/ BUS CDP1855 C.O. ZL YL SHIFT CLK CN0 CN1 WE VDD DATA BUS C.I. ZR YR RA2 RA1 RA0 CTL CE CLR STB RD/ BUS CDP1855 C.O. ZL YL SHIFT CLK CN0 CN1 WE VDD C.I. ZR YR RA2 RA1 RA0 CTL CE CLR STB RD/ BUS CDP1855 C.O. ZL YL SHIFT CLK CN0 CN1 WE C.I. ZR YR RA2 RA1 RA0 CTL CE CLR STB RD/ BUS CDP1855 O.F. ZL YL SHIFT CLK CN0 CN1 WE VDD VDD CLOCK EF1 BUS MRD TPB CLEAR N2 N1 N0 MOST SIGNIFICANT LEAST SIGNIFICANT CDP1855, CDP1855C |
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