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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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H5GQ1H24AFR-R0C датащи(PDF) 18 Page - Hynix Semiconductor |
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H5GQ1H24AFR-R0C датащи(HTML) 18 Page - Hynix Semiconductor |
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18 / 173 page  This document is a general product description and is subject to change without notice. Hynix Semiconductor does not assume any responsability for use of circuits described. No patent licenses are implied. Rev. 1.0 /Nov. 2009 18 H5GQ1H24AFR 2.3. BANK GROUPS For GDDR5 SGRAM devices operating at frequencies above a certain threshold, the activity within a bank group must be restricted to ensure proper operation of the device. The 8 or 16 banks in GDDR5 SGRAMs are divided into four bank groups. The bank groups feature is controlled by bits A10 and A11 in Mode Register 3 (MR3). The assignment of the banks to the bank groups is shown in Table 7. These bank groups allow the specification of different command delay parameters depending on whether back‐to‐back accesses are to banks within one bank group or across bank groups as shown in Table 8. Table 7 Bank Groups Bank Addressing 1G BA3 BA2 BA1 BA0 16 banks 00 000 Group A 10 001 20 010 30 011 40 100 Group B 50 101 60 110 70 111 81 000 Group C 91 001 10 1 010 11 1 011 12 1 100 Group D 13 1 101 14 1 110 15 1 111 |
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