AX88178
USB to 10/100/1000 Gigabit Ethernet/HomePNA Controller
7.4.1.2 XIN125M
TP_XIN125M
TH_XIN125M
TL_XIN125M
VIH
VIL
TR_XIN125M
TF_XIN125M
Symbol
Parameter
Condition
Min
7.5
2.5
2.5
-
Typ
8.0
4.0
4.0
-
Max
8.5
-
-
1.0
1.0
Unit
ns
ns
ns
ns
TP_XIN125M XIN125M clock cycle time
TH_XIN125M XIN125M clock high time
TL_XIN125M XIN125M clock low time
TR_XIN125M XIN125M rise time
VIL (max) to VIH (min)
VIH (min) to VIL (max)
TF_XIN125M XIN125M fall time
-
-
ns
7.4.2 Reset Timing
XIN12M
RESET_N
Trst
Symbol
Trst
Description
Reset pulse width (6ms ~10ms) after XIN12M
is running
Min
72000
Typ
-
Max
-
Units
XIN12M clock cycle
7.4.3 GMII Timing (1000Mbps)
Ttclk
Ttch Ttcl
GTX_CLK
Tts
Tth
TXD [7:0]
TX_EN, TX_ER
Symbol
Description
Min
Typ
Max
8.5
-
-
-
-
Units
ns
ns
ns
ns
Ttclk GTX_CLK clock cycle time
7.5
2.5
2.5
4.0
0.5
8.0
4.0
4.0
-
Ttch
Ttcl
Tts
GTX_CLK clock high time
GTX_CLK clock low time
TXD [7:0], TX_EN, TX_ER setup time
TXD [:0], TX_EN, TX_ER hold time
Tth
-
ns
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ASIX ELECTRONICS CORPORATION
ASIX [ ASIX ELECTRONICS CORPORATION ]
