ax88190 ASIX Electronics Corporation, ax88190 Datasheet - Page 32

• Manufacturer Part Number: ax88190
• Description: Pcmcia 10/100m Fast Ethernet Mac Controller
• Manufacturer: ASIX Electronics Corporation

MEMORY WRITE
MEMA[15:1]
/MEMWR
/MEMRD
Write Data
SD[15:0](Dout)
MEMORY READ
MEMA[15:1]
Referance
Internal
“/MEMRD”
/MEMWR
/MEMRD
Read Data
MEMD[15:1]
* NOTE : The pulse width can be seen as LCLK/XTALIN high time. See also 6.4.1 “Thigh” parameter.
Tsu(A)
Th(A)
Tw(WR)
Tw(RDdis)
Td(WtoR)
Tsu(D)
Th(D)
Tsu(A)
Th(A)
Tw(RD)
Tsu(D)
Th(D)
NOTE : All most any brand asynchronous SRAM access time under 20 ns can fit into the specification.
Symbol
Symbol
6.4.8 Asynchronous Memory I/F Access Timing
AX88190
ADDRESS SETUP TIME
ADDRESS HOLD TIME
WRITE PULSE WIDTH
READ DISABLE PULSE WIDTH
WRITE TO READ DEALY
DATA SETUP TIME
DATA HOLD TIME
ADDRESS SETUP TIME
ADDRESS HOLD TIME
READ PULSE WIDTH
DATA SETUP TIME
DATA HOLD TIME
Tsu(A)
Description
Description
PCMCIA Fast Ethernet MAC Controller
Tsu(A)
Tw(RDdis)
( High Level )
( Low Level )
Tw(WR)
Tsu(D)
Tw(RD)
32
Tsu(RD)
DATA Valid
Valid DATA
Min
Min
0.3
0.3
1.3
36
16
30
1
3
0
ASIX ELECTRONICS CORPORATION
Th(D)
Typ.
Typ.
Th(A)
Th(RD)
Td(WtoR)
*
*
Th(A)
*
-
-
-
-
-
-
-
-
-
Max
Max
4.5
1
2
1
2
-
-
-
-
-
-
-
Units
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns