dm9000bi Davicom Semiconductor, Inc., dm9000bi Datasheet - Page 47

• Manufacturer Part Number: dm9000bi
• Description: Industrial-grade Ethernet Controller With General Processor Interface
• Manufacturer: Davicom Semiconductor, Inc.

10.3.5 Processor I/O Write Timing
Note：(The default clk period is 20ns)
1. The IO16 is valid when the SD bus width is 16-bit
Preliminary
Version: DM9000BI-13-DS-P02
January 17, 2008
Symbol
T
and system address is DATA port (i.e. CMD is high)
and the value of INDEX port is memory data
2
T
T
T
T
T
T
T
T
T
+T
1
2
3
4
5
6
6
7
8
6
CS#,CMD valid to IOW# valid
IOW# Width
System Data(SD) Setup Time
System Data(SD) Hold Time
IOW# Invalid to CS#,CMD Invalid
IOW# Invalid to next IOW#/IOR# valid
When write DM9000BI INDEX port
IOW# Invalid to next IOW#/IOR# valid
When write DM9000BI DATA port
IOW# Invalid to next IOW#/IOR# valid
When write DM9000BI memory
CS#,CMD Valid to IO16 valid
CS#,CMD Invalid to IO16 Invalid
CS#,CMD
IOW#
IO16
SD
T1
Parameter
Industrial-grade Ethernet Controller with General Processor Interface
T7
T2
T3
register index (ex. F0H, F2H, F6H or F8H）
T6
T5
T4
Min.
10
10
0
3
0
1
2
1
T8
∫ ∫
Typ.
DM9000BI
Max.
3
3
Unit
clk*
clk*
clk*
ns
ns
ns
ns
ns
ns
ns
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