mds108 Zarlink Semiconductor, mds108 Datasheet - Page 34

• Manufacturer Part Number: mds108
• Description: Unmanaged 9-port 10/100 Mbps Ethernet Switch
• Manufacturer: Zarlink Semiconductor

14.6
14.7
*Inf. = infinite
Symbol
1
2
3
4
5
6
Symbol
RMII Timing Requirements
MII Timing Requirements
M1
M2
M3
M4
M5
M6
M7
M8_TXCLK rise to M8_TXD[3:0] inactive delay
M8_TXCLK rise to M8_TXD[3:0] active delay
M8_TXCLK rise to M8_TXEN active delay
M8_TXCLK rise of last M8_TXD bit to
M8_TXEN inactive delay
M8_TXCLK High wide
M8_TXCLK Low wide
M8_TXCLK input rise time require
M8_TXCLK input fall time require
M_CLK
M[7:0]_RXD[1:0] input setup time
M[7:0]_RXD[1:0] input hold time
M[7:0]_CRS_DV input setup time
M[7:0]_TXEN output delay time
M[7:0]_TXD[1:0] output delay time
M[7:0]_LINK input setup time
Parameter
Parameter
Table 6 - Transmit Timing Requirements
Table 5 - RMII Timing Requirements
Figure 6 - Transmit Timing
Zarlink Semiconductor Inc.
MDS108
34
Min. (ns)
4
1
4
1
1
4
50 MHz
Min.
25
25
5
5
5
5
Max. (ns)
11
11
Time
Max.
Inf.
Inf.
20
20
20
20
Reference Input Clock
C
C
5
5
L
L
= 30 pF
= 30 pF
Note:
Unit
ns
ns
ns
ns
ns
ns
ns
ns
Data Sheet