ksz8021rnli Micrel Semiconductor, ksz8021rnli Datasheet - Page 38

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

Micrel, Inc.
Reset Timing
The KSZ8021/31RNL reset timing requirement is summarized in Figure 12 and Table 11.
The supply voltage (V
from 10% to 90%.
After the de-assertion of reset, it is recommended to wait a minimum of 100µs before starting programming on the MIIM
(MDC/MDIO) Interface.
August 2010
Parameter
t
t
t
t
t
vr
sr
cs
ch
rc
DDIO,
and V
Description
Supply voltage (V
Stable supply voltage (V
Configuration setup time
Configuration hold time
Reset to strap-in pin output
DDA_3.3
) power-up waveform should be monotonic, and the 300µs minimum rise time is
Table 11. Reset Timing Parameters
DDIO,
Figure 12. Reset Timing
V
DDA_3.3
DDIO,
V
) rise time
DDA_3.3
) to reset high
38
Min.
300
10
5
5
6
KSZ8021RNL / KSZ8031RNL
Max.
Units
ms
µs
ns
ns
ns
M9999-082710-1.0