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Table 7-105. OCP Address to DDR2/3/mDDR Address Mapping for REG_IBANK_POS=1 and
REG_EBANK_POS = 1 (continued)
Logical Address
Chip Select Bank Address[2] Row Address Bank Address[1:0] Column Address
IBANK=2 => 0 bits RSIZE=2 => 11 bits IBANK=2 => 2 bits PAGESIZE=2 => 10 bits
IBANK=3 => 1 bit RSIZE=3 => 12 bits IBANK=3 => 2 bits PAGESIZE=3 => 11 bits
RSIZE=4 => 13 bits
RSIZE=5 => 14 bits
RSIZE=6 => 15 bits
RSIZE=7 => 16 bits
7.3.3.4.7 Address Mapping when REG_IBANK_POS = 2 and REG_EBANK_POS = 1
For REG_IBANK_POS = 2 and REG_EBANK_POS = 1, the interleaving of banks within a device (per chip
select) is limited to 2 banks. Also, the DDR2/3/mDDR memory controller cannot interleave banks between
the two chip selects. Thus, the DDR2/3/mDDR memory controller can keep a maximum of 16 banks (8
internal banks across 2 chip selects) open at a time, but can only interleave among two of them.
Table 7-106. OCP Address to DDR2/3/mDDR Address Mapping for REG_IBANK_POS=2 and
REG_EBANK_POS = 1
Logical Address
Chip Select Bank Address[2:1] Row Address Bank Address[0] Column Address
# of bits defined by # of bits defined by # of bits defined by # of bits defined by # of bits defined by
EBANK of SDRCR IBANK of SDRCR RSIZE of SDRCR IBANK of SDRCR PAGESIZE of SDRCR
EBANK=0 => 0 bits IBANK=0 => 0 bits RSIZE=0 => 9 bits IBANK=0 => 0 bits PAGESIZE=0 => 8 bits
EBANK=1 => 1 bit IBANK=1 => 0 bits RSIZE=1 => 10 bits IBANK=1 => 1 bit PAGESIZE=1 => 9 bits
IBANK=2 => 1 bit RSIZE=2 => 11 bits IBANK=2 => 1 bit PAGESIZE=2 => 10 bits
IBANK=3 => 2 bits RSIZE=3 => 12 bits IBANK=3 => 1 bit PAGESIZE=3 => 11 bits
RSIZE=4 => 13 bits
RSIZE=5 => 14 bits
RSIZE=6 => 15 bits
RSIZE=7 => 16 bits
7.3.3.4.8 Address Mapping when REG_IBANK_POS = 3 and REG_EBANK_POS = 1
For REG_IBANK_POS = 3 and REG_EBANK_POS = 1, the DDR2/3/mDDR memory controller cannot
interleave banks within a device (per chip select) or between the two chip selects. Thus, the
DDR2/3/mDDR memory controller can keep a maximum of 16 banks (8 internal banks across two chip
selects) open at a time, but cannot interleave among of them.
Table 7-107. OCP Address to DDR2/3/mDDR Address Mapping for REG_IBANK_POS=3 and
REG_EBANK_POS=1
Logical Address
Chip Select Bank Address Row Address Column Address
# of bits defined by EBANK of # of bits defined by IBANK of # of bits defined by RSIZE of # of bits defined by PAGESIZE
SDRCR SDRCR SDRCR of SDRCR
EBANK=0 => 0 bits IBANK=0 => 0 bits RSIZE=0 => 9 bits PAGESIZE=0 => 8 bits
EBANK=1 => 1 bit IBANK=1 => 1 bit RSIZE=1 => 10 bits PAGESIZE=1 => 9 bits
IBANK=2 => 2 bits RSIZE=2 => 11 bits PAGESIZE=2 => 10 bits
IBANK=3 => 3 bits RSIZE=3 => 12 bits PAGESIZE=3 => 11 bits
RSIZE=4 => 13 bits
RSIZE=5 => 14 bits
413
SPRUH73H–October 2011–Revised April 2013 Memory Subsystem
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