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AD6650/PCB 数据表(PDF) 7 Page - Analog Devices |
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AD6650/PCB 数据表(HTML) 7 Page - Analog Devices |
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7 / 45 page ![]() AD6650 Rev. A | Page 6 of 44 MICROPROCESSOR PORT TIMING CHARACTERISTICS All timing specifications valid over VDD range of 3.0 V to 3.45 V and VDDIO range of 3.0 V to 3.45 V. Table 5. Microprocessor Port, Mode INM (MODE = 0); Asynchronous Operation Parameter Symbol Temp Test Level Min Typ Max Unit WRITE TIMING WR (R/W) to RDY (DTACK) Hold Time1 tHWR Full IV 0.0 ns Address/Data to WR (R/W) Setup Time1 tSAM Full IV 0.0 ns Address/Data to RDY (DTACK) Hold Time1 tHAM Full IV 0.0 ns WR (R/W) to RDY (DTACK) Delay tDRDY2 Full IV 9.0 15.0 ns WR (R/W) to RDY (DTACK) High Delay1 tACC Full IV 4 × tCLK 13 × tCLK ns READ TIMING Address to RD (DS) Setup Time1 tSAM Full IV 0.0 ns Address to Data Hold Time1 tHAM Full IV 0.0 ns Data Three-state Delay1 tZD Full V 12 ns RDY (DTACK) to Data Delay1 tDD Full IV 0.0 ns RD (DS) to RDY (DTACK) Delay tDRDY2 Full IV 9.0 15.0 ns RD (DS) to RDY (DTACK) High Delay1 tACC Full IV 4 × tCLK 13 × tCLK ns 1 Timing is guaranteed by design. 2 Specification pertains to control signals R/W, WR, DS, RD, and CS such that the minimum specification is valid after the last control signal has reached a valid logic level. Table 6. Microprocessor Port, Mode MNM (MODE = 1) Parameter Symbol Temp Test Level Min Typ Max Unit WRITE TIMING DS (RD) to DTACK (RDY) Hold Time tHDS Full IV 15.0 ns R/W (WR) to DTACK (RDY) Hold Time tHRW Full IV 15.0 ns Address/Data to R/W (WR) Setup Time1 tSAM Full IV 0.0 ns Address/Data to R/W (WR) Hold Time1 tHAM Full IV 0.0 ns DS (RD) to DTACK (RDY) Delay2 tDDTACK Full V 16 ns R/W (WR) to DTACK (RDY) Low Delay1 tACC Full IV 4 × tCLK 13 × tCLK ns READ TIMING DS (RD) to DTACK (RDY) Hold Time tHDS Full IV 15.0 ns Address to DS (RD) Setup Time1 tSAM Full IV 0.0 ns Address to Data Hold Time1 tHAM Full IV 0.0 ns Data Three-State Delay tZD Full V 13 ns DTACK (RDY) to Data Delay1 tDD Full IV 0.0 ns DS (RD) to DTACK (RDY) Delay2 tDDTACK Full V 16 ns DS (RD) to DTACK (RDY) Low Delay1 tACC Full IV 4 × tCLK 13 × tCLK ns 1 Timing is guaranteed by design. 2 DTACK is an open-drain device and must be pulled up with a 1 kΩ resistor. |
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