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AM79C971VCW датащи(PDF) 205 Page - Advanced Micro Devices |
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AM79C971VCW датащи(HTML) 205 Page - Advanced Micro Devices |
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205 / 265 page ![]() Am79C971 205 SWITCHING CHARACTERISTICS: BUS INTERFACE (CONCLUDED) Note: Address is the EBUA_EBA[7:0] bus. Data is the EBDA[15:8] and the EBD[7:0] buses. Parameter Symbol Parameter Name Test Condition Min Max Unit Expansion Bus Interface Timing FCLK EBCLK Frequency 2.5 33 MHz tCYC EBCLK Period @ 1.5 V 30 400 ns tHIGH EBCLK High Time @ 2.0 V 12 ns tLOW EBCLK Low Time @ 0.8 V 12 ns tFALL EBCLK Fall Time over 2 V p-p 1 4 V/ns tRISE EBCLK Rise Time over 2 V p-p 1 4 V/ns tv_A_D Address and Data valid time from the rising edge of EBCLK 13 ns tCS_L ERAMCS assert time from the rising edge of EBCLK 13 ns tCS_H ERAMCS deassert time from rising edge of EBCLK 7 10 ns ts_D Data setup time to the rising edge of EBCLK 0 ns th_D Data hold time from the rising edge of EBCLK 6 ns t_AS_H AS_EBOE (Address Strobe) rising edge from the falling edge of EBCLK 10 13 ns t_AS_L AS_EBOE falling edge from the rising edge of EBCLK 10 13 ns t_OE_H AS_EBOE (Output enable deassert) rising edge from the rising edge of EBCLK 7 ns t_LZ Data Bus driving from the rising edge of EBCLK 5 ns t_HZ Data Bus tristated from the rising edge of EBCLK 13 ns t_WE_L EBWE assert time from the falling edge of EBCLK 6 ns t_WE_H EBWE deassert time from the rising edge of EBCLK 10 ns t_WE_CSAD EBWE setup time to Address, ERAMCS, and Data 1 ns |
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