ksz8021rnli Micrel Semiconductor, ksz8021rnli Datasheet - Page 42

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

Micrel, Inc.
For the KSZ8021/31RNL in RMII – 50MHz Clock Mode, the reference clock is 50MHz. The reference clock connection to
XI (Pin 8), and the reference clock selection criteria are provided in Figure 17 and Table 15.
August 2010
Characteristics
Frequency
Frequency tolerance (max)
Characteristics
Frequency
Frequency tolerance (max)
Table 15. 50MHz Oscillator / Reference Clock Selection Criteria
Table 14. 25MHz Crystal / Reference Clock Selection Criteria
Figure 17. 50MHz Oscillator Reference Clock Connection
Value
Value
±50
±50
25
50
42
Units
Units
MHz
ppm
MHz
ppm
KSZ8021RNL / KSZ8031RNL
M9999-082710-1.0