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W632GG8KB bảng dữ liệu(PDF) 21 Page - Winbond |
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W632GG8KB bảng dữ liệu(HTML) 21 Page - Winbond |
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21 / 159 page  W632GG8KB Publication Release Date: Jul. 28, 2014 Revision: A04 - 21 - 8.3.2.6 Output Disable The DDR3 SDRAM outputs may be enabled/disabled by MR1 (bit A12) as shown in Figure 6. When this feature is enabled (A12 = 1), all output pins (DQs, DQS, DQS#, etc.) are disconnected from the device, thus removing any loading of the output drivers. This feature may be useful when measuring module power, for example. For normal operation, A12 should be set to ‘0’. 8.3.2.7 TDQS, TDQS# TDQS (Termination Data Strobe) provides additional termination resistance outputs that may be useful in some system configurations. When enabled via the mode register, the same termination resistance function is applied to the TDQS/TDQS# pins that is applied to the DQS/DQS# pins. In contrast to the RDQS function of DDR2 SDRAM, TDQS provides the termination resistance function only. The data strobe function of RDQS is not provided by TDQS. The TDQS and DM functions share the same pin. When the TDQS function is enabled via the mode register, the DM function is not supported. When the TDQS function is disabled, the DM function is provided and the TDQS# pin is not used. See Table 3 for details. Table 3 – TDQS, TDQS# Function Matrix MR1 (A11) DM / TDQS NU / TDQS# 0 (TDQS Disabled) DM Hi-Z 1 (TDQS Enabled) TDQS TDQS# Notes: 1. If TDQS is enabled, the DM function is disabled. 2. When not used, TDQS function can be disabled to save termination power. |
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