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M69KB128AA 数据表(PDF) 17 Page - STMicroelectronics |
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M69KB128AA 数据表(HTML) 17 Page - STMicroelectronics |
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17 / 68 page ![]() M69KB128AA 5 Standard asynchronous operating modes 17/68 Table 3. Standard Asynchronous Operating Modes Asynchronous Modes(1) 1. The Clock signal, K, must remain Low in asynchronous operating mode. Power L E W G UB LB WAIT CR A19 A18 A0-A17 A20-A22 DQ0- DQ7 DQ8- DQ15 Word Read Active (ICC) VIL VIL VIH VIL VIL VIL Low- Z VIL Valid Output Valid Output Valid Lower Byte Read VIL VIH VIL VIL Valid Output Valid High-Z Upper Byte Read VIL VIL VIH VIL Valid High-Z Output Valid Word Write VIL X VIL VIL VIL Valid Input Valid Input Valid Lower Byte Write X VIH VIL VIL Valid Input Valid Invalid Upper Byte Write X VIL VIH VIL Valid Invalid Input Valid Read Configuration Register (CR Controlled Method) VIH VIL VIL VIL VIH 00(RCR) 10(BCR) X1(DIDR) (2) 2. A18 and A19 are used to select the BCR, RCR or DIDR registers. X BCR/ RCR/DIDR Content Program Configuration Register (CR Controlled)(3) 3. BCR and RCR only. VIH XX X 00(RCR) 10(BCR) (2) BCR/ RCR Data High-Z No Operation Active (ICC) X XX X X VIL XX X X Deep Power-Down(4) 4. Bit 4 of the Refresh Configuration Register must be set to ‘0’, bit 4 (BCR4) of the Bus Configuration Register must be set to ‘0’, and E has to be maintained High, VIH, during Deep Power-Down mode. Deep Power- Down (ICCPD) VIH XX X X High- Z X X X X High-Z Standby Standby (IPASR) VIH XX X X VIL X X X High-Z |
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