參數(shù)資料
型號: AX88195P
廠商: ASIX Electronics Corporation
英文描述: 10/100BASE Local CPU Bus Fast Ethernet MAC Controller
中文描述: 一個10/100Base本地CPU總線快速以太網(wǎng)MAC控制器
文件頁數(shù): 30/37頁
文件大小: 414K
代理商: AX88195P
ASIX ELECTRONICS CORPORATION
30
AX88195 Local CPU Bus Fast Ethernet MAC Controller
6.4.8 Asynchronous Memory I/F Access Timing
MEMORY WRITE
Tsu(A)
Th(A)
MEMA[15:1]
Tw(WR)
/MEMWR
Td(WtoR)
Tw(RDdis)
/MEMRD
Tsu(D)
Th(D)
Write Data
SD[15:0](Dout)
DATA Valid
Symbol
Tsu(A)
Th(A)
Tw(WR)
Tw(RDdis)
Td(WtoR)
Tsu(D)
Th(D)
Description
Min
36
0.3
Typ.
-
-
*
*
-
-
-
Max
-
1
-
-
4.5
-
2
Units
ns
ns
ns
ns
ns
ns
ns
ADDRESS SETUP TIME
ADDRESS HOLD TIME
WRITE PULSE WIDTH
READ DISABLE PULSE WIDTH
WRITE TO READ DEALY
DATA SETUP TIME
DATA HOLD TIME
1
16
0.3
MEMORY READ
Tsu(A)
Th(A)
MEMA[15:1]
Referance
Internal
“/MEMRD”
Tw(RD)
( High Level )
/MEMWR
( Low Level )
/MEMRD
Tsu(RD)
Th(RD)
Read Data
MEMD[15:1]
Valid DATA
Symbol
Tsu(A)
Th(A)
Tw(RD)
Tsu(D)
Th(D)
* NOTE : The pulse width can be seen as LCLK/XTALIN high time. See also 6.4.1 “Thigh” parameter.
NOTE : All most any brand asynchronous SRAM access time under 20 ns can fit into the specification.
Description
Min
30
1.3
Typ.
-
-
*
-
-
Max
-
1
-
-
2
Units
ns
ns
ns
ns
ns
ADDRESS SETUP TIME
ADDRESS HOLD TIME
READ PULSE WIDTH
DATA SETUP TIME
DATA HOLD TIME
3
0
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