參數(shù)資料
型號(hào): GT-48212
廠商: Galileo Technology Services, LLC
英文描述: Advanced Switched Ethernet Controllers for 10+10/100 BaseX(高級(jí)交換式 10+10/100 BaseX以太網(wǎng)控制器)
中文描述: 先進(jìn)的交換式以太網(wǎng)控制器的10 10/100 BaseX(高級(jí)交換式10 10/100 BaseX以太網(wǎng)控制器)
文件頁數(shù): 79/135頁
文件大?。?/td> 1619K
代理商: GT-48212
GT-482xx Switched Ethernet Controllers for 10+10/100 BaseX
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Revision 1.2
10.
ENABLING/DISABLING PORTS
The GT-482xx ports can be enabled and disabled depending by a combination of:
An external hardware pin, EnDev* (LOW - device enabled, HIGH - device disabled)
EnableDevice, bit 20 of the Global Control Register (‘0’ - device status based on EnDev*, ‘1’ - device
enabled)
PortEn, bit 0 of each Port Control register, (‘0’ - port disabled, ‘1’ - port enabled)
When a port is disabled, no packets are received or transmitted from the serial ports or the CPU bus. Even though
ports are disabled, the CPU can read from and write to the GT-482xx’s registers. See Table 11 for the enabling or
disabling of the GT-482xx ports.
Table 11:
Enabling/Disabling Ports of the GT-482xx
En D ev* Pi n
Ena bleD evice B it
Po r t En
B i t
Por t St atus
LOW
0
Disabled
LOW
0
1
Enabled
LOW
1
0
Disabled
LOW
1
Enabled
HIGH
0
Disabled
HIGH
0
1
Disabled
HIGH
1
0
Disabled
HIGH
1
Enabled
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