Texas Instruments TMS380C26 - Manual (Page 56)

TMS380C26
NETWORK COMMPROCESSOR
SPWS010A–APRIL 1992–REVISED MARCH 1993
POST OFFICE BOX 1443
•
HOUSTON, TEXAS
77251–1443
56
PARAMETER MEASUREMENT INFORMATION
ethernet timing of clock signals
NO. PARAMETER MIN TYP MAX UNIT
300 CLKPHS Pulse duration of TXC 45 ns
301 CLKPER Cycle time of TXC 95 1000 ns
TXC
300
2.4 V
0.45 V
300
301
Figure 21. Ethernet Timing Of Clock Signals
ethernet timing of XMIT signals
NO. PARAMETER MIN TYP MAX UNIT
305 tXDHLD Hold time of TXD after TXC high 5 ns
306 tXDVLD
Delay time from TXC high to TXD valid and
Delay time from TXC high to TXEN high
40 ns
TXC
TXD
TXEN
305
306 306
2.4 V
0.45 V
2.4 V
0.45 V
Figure 22. Ethernet Timing of XMIT Signals