參數(shù)資料
型號(hào): GT-48004A
廠商: Galileo Technology Services, LLC
英文描述: Four Port Switched Fast Ethernet Controller(四端口、交換式快速以太網(wǎng)控制器)
中文描述: 四端口交換式快速以太網(wǎng)控制器(四端口,交換式快速以太網(wǎng)控制器)
文件頁數(shù): 61/106頁
文件大小: 953K
代理商: GT-48004A
GT-48004A Four Port Switched Fast Ethernet Controller
N:\Marketing\Docs\Archive\48004A\DATASHEET\Rev 1.0\484ads10.fm
Revision 1.0
58
Figure 12: GT-48004A MDC Waveform
Table 28: Typical MDC Timings
A waveform of the MDIO line when it is driven by the GT-48004A is shown in Figure 13. The actual delay times of the
GT-48004A are tighter than the IEEE 802.3u standard, clause 22.3.4, as shown in Table 29.
Figure 13: GT-48004A MDIO Output Delay
Table 29: MDIO Signal Timings (GT-48004A Driving MDIO)
A waveform of the MDIO line when it is driven by the PHY is shown in Figure 13. The setup and hold times require-
ments of the GT-48004A 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-48004A
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-48004A
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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