4.16 Mdio Timing Requirements Over Recommended Operating Conditions; Mdio Read/Write Timing; Hstl I/O Schematic - Texas Instruments TLK3134 Data Manual

TLK3134
SLLS838F – MAY 2007 – REVISED DECEMBER 2009

4.16 MDIO Timing Requirements Over Recommended Operating Conditions

PARAMETER
t MDC period
period
t MDIO setup to ↑ MDC
setup
t MDIO hold to ↑ MDC
hold
T MDIO valid from MDC ↑
valid
(1) Unless otherwise noted.
MDC
MDIO
50 W
OUTPUT
124 Electrical Specifications
TEST CONDITIONS
See Figure 4-13.
See Figure 4-13.
See Figure 4-13.
t
PERIOD
t
SETUP
Figure 4-13. MDIO Read/Write Timing
50 W transmission line
VDDQ
GND
PCB
Figure 4-14. HSTL I/O Schematic
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MIN
100
10
10
0
t
HOLD
VDDQ
150/200/
300/Open
( )
W
150/200/
300/Open
( ) W
GND
R W
VREF
R W
INPUT
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(1)
NOM MAX UNIT
ns
ns
ns
40 ns
+
-