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W97AH6KB Datasheet(PDF) 64 Page - Winbond

Part # W97AH6KB
Description  Four-bit prefetch DDR architecture
PDF  127 Pages
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Manufacturer  WINBOND [Winbond]
Direct Link  http://www.winbond.com
Logo WINBOND - Winbond

W97AH6KB Datasheet(HTML) 64 Page - Winbond

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W97AH6KB / W97AH2KB
Publication Release Date: May 15, 2014
Revision: A01-001
- 64 -
7.4.24.3 ZQ Calibration Long Timing Example
CK_t / CK_c
CA0-9
[Cmd]
T0
T1
T2
T3
T4
T5
Tx
Tx+1
Tx+2
tZQCL
CMD not allowed
MRW
ANY
MR Addr MR Data
Notes:
1.
The ZQ Calibration Long period is tZQCL. 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.
7.4.24.4 ZQ Calibration Reset Timing Example
CK_t / CK_c
CA0-9
[Cmd]
T0
T1
T2
T3
T4
T5
Tx
Tx+1
Tx+2
tZQRESET
CMD not allowed
MRW
ANY
MR Addr MR Data
Notes:
1.
The ZQ Calibration Reset period is tZQRESET. 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.



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