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Zynq-7000 AP SoC Technical Reference Manual www.xilinx.com 857
UG585 (v1.11) September 27, 2016
Appendix B: Register Details
Field Name Bits Type Reset Value Description
reg_ddrc_addrmap_col
_b11
31:28 rw 0xF Full bus width mode: Selects the address bit used
as column address bit 13. (Column address bit 12
in LPDDR2 mode)
Half bus width mode: Unused. To make it
unused, this should be set to 15. (Column address
bit 13 in LPDDR2 mode)
Valid Range: 0 to 7, and 15.
Internal Base: 14.
The selected address bit is determined by adding
the Internal Base to the value of this field. If set to
15, this column address bit is set to 0. Note: Per
JEDEC DDR2 spec, column address bit 10 is
reserved for indicating auto-precharge, and hence
no source address bit can be mapped to column
address bit 10. In LPDDR2, there is a dedicated bit
for auto-precharge in the CA bus, and hence
column bit 10 is used.
reg_ddrc_addrmap_col
_b10
27:24 rw 0xF Full bus width mode: Selects the address bit used
as column address bit 12. (Column address bit 11
in LPDDR2 mode)
Half bus width mode: Selects the address bit used
as column address bit 13. (Column address bit 12
in LPDDR2 mode) Valid Range: 0 to 7, and 15.
Internal Base: 13
The selected address bit is determined by adding
the Internal Base to the value of this field. If set to
15, this column address bit is set to 0. Note: Per
JEDEC DDR2 spec, column address bit 10 is
reserved for indicating auto-precharge, and hence
no source address bit can be mapped to column
address bit 10. In LPDDR2, there is a dedicated bit
for auto-precharge in the CA bus, and hence
column bit 10 is used.