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Zynq-7000 AP SoC Technical Reference Manual www.xilinx.com 858
UG585 (v1.11) September 27, 2016
Appendix B: Register Details
reg_ddrc_addrmap_col
_b9
23:20 rw 0xF Full bus width mode: Selects the address bit used
as column address bit 11. (Column address bit 10
in LPDDR2 mode)
Half bus width mode: Selects the address bit used
as column address bit 12. (Column address bit 11
in LPDDR2 mode)
Valid Range: 0 to 7, and 15
Internal Base: 12
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
_b8
19:16 rw 0x0 Full bus width mode: Selects the address bit used
as column address bit 9.
Half bus width mode: Selects the address bit used
as column address bit 11. (Column address bit 10
in LPDDR2 mode)
Valid Range: 0 to 7, and 15
Internal Base: 11
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 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
_b7
15:12 rw 0x0 Full bus width mode: Selects the address bit used
as column address bit 8.
Half bus width mode: Selects the address bit used
as column address bit 9.
Valid Range: 0 to 7, and 15.
Internal Base: 10.
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 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.
Field Name Bits Type Reset Value Description