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AS4C8M32MD2A-25BPCN Datasheet(PDF) 67 Page - Alliance Semiconductor Corporation |
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AS4C8M32MD2A-25BPCN Datasheet(HTML) 67 Page - Alliance Semiconductor Corporation |
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67 / 75 page  Figure 39. Mode Register Write timing (RL = 3, tMRW = 5) CK# T1 T2 Tx Tx+1 Tx+2 Ty Ty+1 T0 CK COMMAND CA0~9 MR Addr MR Data MR Addr MR Data Ty+2 MRW MRW ANY tMRW tMRW NOTES: 1. The Mode Register Write Command period is tMRW. No command (other than Nop) is allowed during this period. 2. At time Ty, the device is in the idle state. CMD not allowed Figure 40. ZQ Calibration Initialization timing T1 T2 T3 T4 T5 Tx Tx+1 T0 MR Addr MR Data Tx+2 MRW ANY tZQINIT NOTES: 1. The ZQ Calibration Initialization period is tZQINIT. No command (other than Nop) is allowed during this period. 2. CKE must be continuously registered HIGH during the calibration period. 3. All devices connected to the DQ bus should be high impedance during the calibration process. CMD not allowed CK# CK COMMAND CA0~9 Figure 41. ZQ Calibration short timing CK# T1 T2 T3 T4 T5 Tx Tx+1 T0 CK COMMAND ADDRESS MR Addr MR Data Tx+2 MRW ANY tZQCS NOTES: 1. The ZQ Calibration Short period is tZQCS. No command (other than Nop) is allowed during this period. 2. CKE must be continuously registered HIGH during the calibration period. 3. All devices connected to the DQ bus should be high impedance during the calibration process. CMD not allowed AS4C8M32MD2A-25BPCN Confidential - 67 - Rev.1.1. May 2019 |
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