dm9000b Davicom Semiconductor, Inc., dm9000b Datasheet - Page 46

• Manufacturer Part Number: dm9000b
• Description: Ethernet Controller With General Processor Interface
• Manufacturer: Davicom Semiconductor, Inc.

10.3.4 Processor I/O Read Timing
*Note：
*1: 19ns for bus driving 2mA, 12ns for 4mA, 10ns for 6mA, 10ns for 8mA.
*2: The Default clock period is 20ns
Final
Version: DM9000B-13-DS-F02
June 4, 2009
Symbol
T2+T
T
2
T
T
T
T
T
T
+T
1
2
3
4
5
6
6
6
CS#,CMD valid to IOR# valid
IOR# width
System Data(SD) Delay time
IOR# invalid to System Data(SD) invalid
IOR# invalid to CS#,CMD invalid
IOR# invalid to next IOR#/IOW# valid
When read DM9000B register
IOR# valid to next IOR#/IOW# valid
When read DM9000B memory with F0h register
IOR# valid to next IOR#/IOW# valid
When read DM9000B memory with F2h register
CS#,CMD
SD
IOR#
T1
Parameter
T3
T2
Ethernet Controller with General Processor Interface
T4
T5
T6
Min.
20
0
0
2
4
1
Typ.
DM9000B
Max.
19
19
Clk
Clk
Clk
ns
ns
Unit
ns
ns
ns
*1
*1
*2
*2
*2
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