Section 12 DDR-SDRAM Interface (DDRIF)
Rev. 1.00 Oct. 01, 2007 Page 415 of 1956
REJ09B0256-0100
12.4 Register
Descriptions
Table 12.4 shows the DDRIF registers.
These registers should be set when access is not made to the DDR-SDRAM from peripheral
modules. When the access is not made and the DCE bit (DDR-SDRAM control enable) in the
memory interface mode register is cleared to 0 or the SELFS bit (self-refresh status) in that
register is set to 1, set other registers.
Although the bit width for registers is 64 bits, access the registers in longwords (32 bits). Writing
to this register is reflected in longwords. Reading this register returns a current longword value. In
big endian mode, when accessing bits 63 to 32, specify address 8n
+
0. When accessing bits 31 to
0, specify address 8n
+
4.
Table 12.4 Register Configuration
Register Name
Abbreviation R/W
Area P4
Address
*
1
Area 7
Address
*
1
Access
Size
Memory interface mode register MIM
R/W
H'FE80 0008
H'1E80 0008
32
DDR-SDRAM control register
SCR
R/W
H'FE80 0010
H'1E80 0010
32
DDR-SDRAM timing register
STR
R/W
H'FE80 0018
H'1E80 0018
32
DDR-SDRAM row attribute
register
SDR
R/W
H'FE80 0030
H'1E80 0030
32
DDR-SDRAM mode register
SDMR
(W)
H'FE9x xxxx
*
2
H'1E9x xxxx
*
2
32
DDR-SDRAM back-up register
DBK
R
H'FE80 0400
H'1E80 0400
32
Notes: 1. P4 addresses are used when area P4 in the virtual address space is used, and area 7
addresses are used when accessing the register through area 7 in the physical address
space using the TLB.
2. For details, see section 12.4.5, DDR-SDRAM Mode Register (SDMR).
Содержание SH7763
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Страница 514: ...Section 12 DDR SDRAM Interface DDRIF Rev 1 00 Oct 01 2007 Page 448 of 1956 REJ09B0256 0100 ...
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Страница 686: ...Section 14 Direct Memory Access Controller DMAC Rev 1 00 Oct 01 2007 Page 620 of 1956 REJ09B0256 0100 ...
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Страница 1720: ...Section 37 LCD Controller LCDC Rev 1 00 Oct 01 2007 Page 1654 of 1956 REJ09B0256 0100 ...
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