參數(shù)資料
型號： STV0684
廠商： 意法半導體
英文描述： Digital Camera Processor
中文描述： 數(shù)碼相機處理器
文件頁數(shù)： 38/49頁
文件大?。?/td> 487K
代理商： STV0684
Electrical Characteristics
STV0684
38/49
4.5.9.1
Compact flash pin description
The following table lists the pins of the CF card which are connected to the STV0684.Output refers
to pins that are driven by STV0684. Input is those pins that are driven by the CF Card.
4.5.9.2
Compact flash timings
The timings achieved for accessing the attribute and common memory are listed below.There are
registers in the CF Controller of the STV0684 in which all these timings can be programmed in
terms of number of clocks of 48MHz. All the timings below assume a 48MHz operating clock
frequency.
Table 13: Pin description
Symbol
Pin Description
Direction
SFP used
CFA0 ~CFA10
Address
Output
52~62
CARD_DET
CARD_DET2
Card Detect
Input
50
CS CARD EN
Card Enable.
Output
49
IO0~IO7
Data. Only 8 bits of the data bus D[7:0] are used.
Input
35~42
ALE OE
Output Enable
Output
45
CLE RDY
Ready/Busy
Input
46
RE REG
Register(Attribute) Memory Select
Output
48
RST
Reset
note
1
1. The reset may come from the global reset of the system or be driven by a user definable SFP this
function is application specific.
RB WAIT
Wait
Input
47
WE
Write Enable
Output
44
Table 14: CF attribute memory read timing
Symbol
Parameter
Min.
Typ.
Max.
Units
tc(R)
Read Cycle Time
340
-
ns
ta(A)
Address Access Time
-
300
ns
ta(CE)
Card Enable Access Time
-
300
ns
ta(OE)
Output Enable Access Time
-
300
ns
tdis(CE)
Output Disable Time from CE
-
100
ns
tdis(OE)
Output Disable Time from OE
-
100
ns
tsu (A)
Address Setup Time
40
-
ns
ten(CE)
Output Enable Time from CE
5
-
ns
ten(OE)
Output Enable Time from OE
5
-
ns
tv(A)
Data Valid from Address Change
0
-
ns
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