ksz8021rnli Micrel Semiconductor, ksz8021rnli Datasheet - Page 35

• Manufacturer Part Number: ksz8021rnli
• Description: 10base-t/100base-tx Phy With Rmii Support
• Manufacturer: Micrel Semiconductor

Micrel, Inc.
Timing Diagrams
RMII Timing
August 2010
Table 7. RMII Timing Parameters – KSZ8021/31RNL (25MHz input to XI pin, 50MHz output from REF_CLK pin)
Table 8. RMII Timing Parameters – KSZ8021/31RNL (50MHz input to XI pin)
Timing Parameter
t
t
t
t
Timing Parameter
t
t
t
t
cyc
1
2
od
cyc
1
2
od
Figure 8. RMII Timing – Data Received from RMII
Figure 9. RMII Timing – Data Input to RMII
Description
Clock cycle
Setup time
Hold time
Output delay
Description
Clock cycle
Setup time
Hold time
Output delay
35
Min.
Min.
4
2
7
4
8
9
Typ.
Typ.
20
20
13
9
Max.
Max.
13
15
Unit
Unit
ns
ns
ns
ns
ns
ns
ns
ns
KSZ8021RNL / KSZ8031RNL
M9999-082710-1.0