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 95
8.6.4
Gigabit Media Independent Interface (GMII) AC Timing
8.6.4.1
GMII AC Timing Table
Table 51: GMII AC Timing Table
8.6.4.2
GMII Test Circuit
Figure 11: GMII Test Circuit
Min
Max
GTX_CLK cycle time
tCK
7.5
8.5
ns
-
RX_CLK cycle time
tCKrx
7.5
-
ns
-
GTX_CLK and RX_CLK high level w idth
tHIGH
2.5
-
ns
1
GTX_CLK and RX_CLK low level w idth
tLOW
2.5
-
ns
1
GTX_CLK and RX_CLK rise time
tR
-
1.0
ns
1, 2
GTX_CLK and RX_CLK fall time
tF
-
1.0
ns
1, 2
Data input setup time relative to RX_CLK rising edge
tSETUP
2.0
-
ns
-
Data input hold time relative to RX_CLK rising edge
tHOLD
0.0
-
ns
-
Data output valid before GTX_CLK rising edge
tOVB
2.5
-
ns
1
Data output valid after GTX_CLK rising edge
tOVA
0.5
-
ns
1
Notes:
General comment: All values w ere measured from VIL(max) to VIH(min), unless otherw ise specified.
1. For all signals, the load is CL = 5 pF.
2. Rise time measured from VIL(max) to VIH(min), fall time measured from VIH(min) to VIL(max).
Notes
125 MHz
Description
Sym bol
Units
CL
Test Point