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H5GQ2H24AFR-R0C 데이터시트(PDF) 18 Page - Hynix Semiconductor

부품명 H5GQ2H24AFR-R0C
상세설명  2Gb (64Mx32) GDDR5 SGRAM
PDF  172 Pages
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제조업체  HYNIX [Hynix Semiconductor]
홈페이지  http://www.skhynix.com/kor/main.do
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H5GQ2H24AFR-R0C 데이터시트(HTML) 18 Page - Hynix Semiconductor

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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. 1.2 /Nov. 2011
18
H5GQ2H24AFR
 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 or eight 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
2G
2G
BA3
BA2
BA1
BA0
16 banks
16 banks
00
0
0
0
Group A
Group A
10
0
0
1
20
0
1
0
Group B
30
0
1
1
40
1
0
0
Group B
Group C
50
1
0
1
60
1
1
0
Group D
70
1
1
1
81
0
0
0
Group C
Group E
91
0
0
1
10
1
0
1
0
Group F
11
1
0
1
1
12
1
1
0
0
Group D
Group G
13
1
1
0
1
14
1
1
1
0
Group H
15
1
1
1
1



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