DM9006 Datasheet, PDF (73/76 Pages) Davicom Semiconductor, Inc. – 10/100 Mbps 2-port Ethernet Switch Controller with General Processor Interface

10.4.3 Processor I/O Write Timing
DM9006
2-port Switch with Processor Interface
CS#,CMD
IOW#
SD0~15
T1
T2
T3
T6
T5
T4
∫∫
Symbol
Parameter
T1 CS#,CMD valid to IOW# valid
T2 IOW# Invalid to CS#,CMD Invalid
T3 IOW# Width
T4 IOW# Invalid to next IOW#/IOR# valid
When write DM9006 INDEX port
T4 IOW# Invalid to next IOW#/IOR# valid
When write DM9006 DATA port
T3+T4 IOW# Invalid to next IOW#/IOR# valid
When write DM9006 memory
T5 System Data(SD) Setup Time
T6 System Data(SD) Hold Time
*1 : the Unit: clk is under the internal system clock 50MHz.(20ns).
Min.
5
5
20
1
2
1
5
3
Typ.
Max.
Unit
ns
ns
ns
Clk *1
Clk *1
Clk *1
ns
ns
Preliminary datasheet
73
DM9006-13-DS-P01
September 1, 2009