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IXF1104 4-Port Gigabit Ethernet Media Access Controller
Datasheet 146
Document Number: 278757
Revision Number: 009
Revision Date: 27-Oct-2005
7.6.3 MDIO AC Timing
Figure 43. MDIO Write Timing Diagram
Figure 44. MDIO Read Timing Diagram
Table 52. MDIO Timing Parameters
Parameter Symbol Min Typ
1
Max Units Test Conditions
MDIO Setup before MDC. t1
10 – – ns MDC = 17.8 MHz
10 – – ns MDC = 2.5 MHz
MDIO Hold after MDC. t2
10 – – ns MDC = 17.8 MHz
10 – – ns MDC = 2.5 MHz
MDC to MDIO Output delay t3
0 – 42 ns MDC = 17.8 MHz
0 – 300 ns MDC = 2.5 MHz
1. Typical values are at 25
o
C and are for design aid only; not guaranteed and not subject to production
testing.
t1
MDC
MDIO
t2
V
MAX
V
MIN
t3
MDC
MDIO
V
MAX