参数资料
型号: GT-48002A
厂商: Galileo Technology Services, LLC
英文描述: Switched Fast Ethernet Controller for 100BaseX(100BaseX交换式快速以太网控制器)
中文描述: 交换式快速以太网控制器(100BaseX交换式快速以太网控制器的100BaseX)
文件页数: 54/102页
文件大小: 1001K
代理商: GT-48002A
Switched Fast Ethernet Controller
Revision 1.2
55
Figure 9: GT-48002A MDC Waveform
Table 28: Typical MDC Timings
A waveform of the MDIO line when it is driven by the GT-48002A is shown in Figure 10. The actual delay times of the
GT-48002A are tighter than the IEEE 802.3u standard, clause 22.3.4, as shown in Table 29.
Figure 10: GT-48002A MDIO Output Delay
Table 29: MDIO Signal Timings (GT-48002A Driving MDIO)
A waveform of the MDIO line when it is driven by the PHY is shown in Figure 11. The setup and hold times require-
ments of the GT-48002A are the same as the IEEE 802.3u standard, clause 22.3.4, as shown in Table 30.
1. MDC is generated internally by dividing the Clk clock input by 32. Clk clock frequency of 33MHz is
assumed.
GT- 48002 A
Na m e
Pa ra m e te r
TY PI CA L
Un its
t1
MDC High Time
480
ns
t2
MDC Low Time
480
ns
t31
MDC Period
960
ns
GT- 48002A
IE EE 802.3 u Spe c .
Na m e
Pa ra m e te r
MI N
MA X
MIN
MAX
Un its
t4
Rising MDC to Valid MDIO
10
50
0
300
ns
t1
MDC
Vih
min
Vil
max
t2
t3
t4
MDC
MDIO
Vih
min
Vil
max
Vih
min
Vil
max
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