參數(shù)資料
型號: GT-48212
廠商: Galileo Technology Services, LLC
英文描述: Advanced Switched Ethernet Controllers for 10+10/100 BaseX(高級交換式 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(高級交換式10 10/100 BaseX以太網(wǎng)控制器)
文件頁數(shù): 135/135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
99
Table 46: General Purpose Register2, Offset: 0x5C
B it s
Field N ame
Funct ion
Initial Va lue
11:0
GpDir
General Purpose direction. These bits determine the direc-
tion of the ColE/GP[11:0] pins (per bit basis) as follows:
1 - ColE/GP[11:0] are inputs. GP bits reflect the value on
these pins.
0 - ColE/GP[11:0] are output. They carry the value of GP
bits.
0xFFF
Table 47: Rx_10 Threshold, Offset: 0x60
B it s
Field N ame
Funct ion
Init ia l Va lu e
7:0
RxBufThr
Receive Buffer Threshold for the 10Mbps ports. The thresh-
old is: RxBufThr * 8.
0x4 @1M (32)
0x8 @4M (64)
Earlier ver-
sions:
0x2 @1M (16)
For GT-48212-
P5: 0x3 (32)
15:8
XOffLimit
X-OFF Limit - When Flow control is enabled, the GT-482xx
will send X-OFF packet when the number of buffers for this
port reach (XOffLimit * 4) value
0x7 @1M (28)
0x8 @4M (32)
23:16
XOnLimit
X-ON Limit - When Flow control is enabled, the GT-482xx
will send X-ON packet when the number of buffers for this
port going below (XOnLimit * 4) value
0x6 @1M (24)
0x6 @4M (24)
31:24
HolLimit
HOL Limit - the GT-482xx discards packet when the Tx
queue exceeds TxThr limit and the number of buffers allo-
cated to this port exceed (HolLimit * 8)
0x3 @1M (24)
0x3@4M (24)
Table 48: Rx_100 Threshold, Offset: 0x64
B it s
Field N ame
Funct ion
Initial Va lue
7:0
RxBufThr
Receive Buffer Threshold for the 100Mbps ports. The
threshold is: RxBufThr * 8.
0x8 @1M (64)
0x4A @4M
(592)
Earlier versions:
0x12 @1M
(144)
For GT-48212-
P5: 0x8 (64)
15:8
XOffLimit
X-OFF Limit - When Flow control is enabled, the GT-482xx
will send X-OFF packet when the number of buffers for this
port reach (XOffLimit * 8) value
0x3 @1M (24)
0x46 @4M
(560)
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