Marvel 88F6281 User Manual
Electrical Specifications
AC Electrical Specifications
Copyright © 2008 Marvell
Doc. No. MV-S104859-U0 Rev. E
December 2, 2008, Preliminary
Document Classification: Proprietary Information
Page 99
8.6.6
Serial Management Interface (SMI) AC Timing
8.6.6.1
SMI Master Mode AC Timing Table
Table 53: SMI Master Mode AC Timing Table
8.6.6.2
SMI Master Mode Test Circuit
Figure 17: MDIO Master Mode Test Circuit
Description
Sym bol
Min
Max
Units
Notes
MDC clock frequency
fCK
MHz
2
MDC clock duty cycle
tDC
0.4
0.6
tCK
-
MDIO input setup time relative to MDC rise time
tSU
40.0
-
ns
-
MDIO input hold time relative to MDC rise time
tHO
0.0
-
ns
-
MDIO output valid before MDC rise time
tOVB
15.0
-
ns
1
MDIO output valid after MDC rise time
tOVA
15.0
-
ns
1
Notes:
General comment: All timing values w ere measured from VIL(max) and VIH(min) levels, unless otherw ise specified.
General comment: tCK = 1/fCK.
1. For MDC signal, the load is CL = 390 pF, and for MDIO signal, the load is CL = 470 pF.
2. See "Reference Clocks" table for more details.
See note 2
CL
2 kilohm
VDDIO
Test Point
MDIO