KS8695P Micrel Memory Interface The KS8695P has a glueless interface for SDRAM and static memory, i.e. ROM, " />
參數(shù)資料
型號(hào): KS8695P-EVAL
廠商: Micrel Inc
文件頁(yè)數(shù): 13/40頁(yè)
文件大小: 0K
描述: BOARD EVAL EXPERIMENT KS8695P
標(biāo)準(zhǔn)包裝: 1
其它名稱(chēng): 576-1002
M9999-081805
20
August 2005
KS8695P
Micrel
Memory Interface
The KS8695P has a glueless interface for SDRAM and static
memory, i.e. ROM, SRAM, and Flash. It supports up to two
banks of static memory (Figure 7), up to two banks of SDRAM
(Figure 8), and three banks of external I/O (Figure 9). The
total address space for the KS8695P is 64MB. This includes
SDRAM, static memory, external I/O, and the KS8695P's own
64KB of register space.
The memory interface for the SDRAM and static memory has
a special automatic address mapping feature. This allows the
designer to connect address bit 0 on the memory to ADDR[0]
on the KS8695P and address bit 1 on the memory toADDR[1]
on the memory, regardless of whether the designer is trying
to achieve word, half word, or byte addressing.
The KS8695P memory controller performs the address map-
ping internally. This permits the designer to use the maximum
amount of address bits, instead of losing one or two bits
because of address mapping. For external I/O, however,
the designer still needs to take care of the address mapping
(see Figure 9).
KS8695P
Byte Wide
Static Memory
ADDR0
ADDR1
ADDR[21:2]
A0
A1
A[21:2]
DATA[7:0]
D[7:0]
8
20
OE
WE
CE
RCSN0
EROEN
ERWEN0
KS8695P
Half Word Wide
Static Memory
ADDR0
ADDR1
ADDR[21:2]
A0
A1
A[21:2]
DATA[15:0]
D[15:0]
16
20
OE
WE
CE
RCSN0
EROEN
ERWEN0
BYTE
VDD
Figure 7. Static Memory Interface Examples
SDOCLK
SDCKE
DATA[31..0]
ADDR[11..0]
SDRASN
SDCASN
SDQM[3..0]
SDWEN
KS8695P
SDRAM
4M x 32
CLK
CKE
CS#
WE#
CAS#
RAS#
A[11..0]
DQ[31..0]
SDCSN0
DQM[3..0]
ADDR[21..20]
BA[1..0]
32
12
2
4
SDICLK
SDOCLK
SDCKE
DATA[15..0]
ADDR[12..0]
SDRASN
SDCASN
SDQM0
SDWEN
KS8695P
SDRAM
16M x 16
CLK
CKE
CS#
WE#
CAS#
RAS#
A[12..0]
DQ[15..0]
SDCSN0
LDQM
ADDR[21..20]
BA[1..0]
16
13
2
SDICLK
SDQM1
UDQM
Half Word Wide
Word Wide
Figure 8. SDRAM Interface Examples
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