DM9008AEP_06 DAVICOM [Davicom Semiconductor, Inc.], DM9008AEP_06 Datasheet - Page 42

• Manufacturer Part Number: DM9008AEP_06
• Description: Ethernet Controller with General Processor Interface
• Manufacturer: DAVICOM [Davicom Semiconductor, Inc.]

10.3 AC Electrical Characteristics & Timing Waveforms
10.3.1 Oscillator/Crystal Timing
10.3.2 Processor I/O Read Timing
*Note：(the default clk period is 20ns)
1. The IO16 is valid when the SD bus width is 16-bit
Preliminary
Version: DM9008AEP-DS-P03
Dec. 14, 2006
Symbol
Symbol
T
and the system address is DATA port (i.e. CMD is
high) and the value of INDEX port is memory data
T
T
T
2
T
T
T
T
T
T
T
T
T
PWH
+T
CKC
PWL
1
2
3
4
5
6
6
7
8
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 DM9008A register
IOR# invalid to next IOR#/IOW# valid
When read DM9008A memory with F0h register
IOR# invalid to next IOR#/IOW# valid
When read DM9008A memory with F2h register
CS#,CMD valid to IO16 valid
CS#,CMD invalid to IO16 invalid
OSC Clock Cycle
OSC Pulse Width High
OSC Pulse Width Low
IO R #
IO 16
SD
C S#,C M D
Parameter
→
→
Parameter
T1
←
←
←
←
T7
T3
→
T2
→
→
→
Ethernet Controller with General Processor Interface
39.998
Min.
←
T4
16
16
T5
register index.（ex. F0H, F2H, F6H or F8H）
→
←
←
Typ.
←
40
20
20
T6
T8
Min.
10
0
0
2
4
1
40.002
Max.
→
24
24
Typ.
DM9008AEP
Unit
ns
ns
ns
Max.
3
3
3
3
Conditions
50ppm
Unit
clk*
clk*
clk*
ns
ns
ns
ns
ns
ns
ns
42