Pcio – Cirrus Logic EP93xx User Manual
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DS785UM1
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Copyright 2007 Cirrus Logic
Static Memory Controller
EP93xx User’s Guide
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The value written to this field specifies the minimum
‘number of HCLK cycles, minus 1’ that the data strobe,
MCDAENn
,
is asserted during a Read or Write access.
The data strobe assertion time is specified by (AC+1)
HCLK cycles. For example, if AC = 0x10, the data strobe
assertion time is 16 + 1 = 17 cycles of HCLK
HC:
Common space Hold time - Read/Write
The value written to this field specifies the minimum
‘number of HCLK cycles, minus 1’ between de-asserting
the data strobe, MCDAENn
,
and de-asserting the address
strobe, MCADENn.
The Hold time is specified by (HC +1) HCLK cycles. For
example, if HC = 0xC, the Hold time is 12 + 1 = 13 cycles
of HCLK.
PC:
Common space setup time - Read/Write
The value written to this field specifies the ‘number of
HCLK cycles, minus 1’ that the address strobe,
MCADENn, is set up before assertion of the data strobe,
MCDAENn.
The Setup time is specified by (PC+1) HCLK cycles. For
example, if PC = 0x25, the Setup time is 37 + 1 = 38
cycles of HCLK.
PCIO
Address: 0x8008_0028 - Read/Write
Default: 0x0000_0000
Definition: PC Card IO register
Bit Descriptions:
RSVD:
Reserved - Unknown During Read
WI:
IO Space Width - Read/Write
The value written to this bit specifies the bus-width of the
IO space:
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
WI
RSVD
AI
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
RSVD
HI
PI