參數(shù)資料
型號: 83C795
廠商: SMSC Corporation
英文描述: Ethernet System Controller
中文描述: 以太網(wǎng)系統(tǒng)控制器
文件頁數(shù): 35/136頁
文件大?。?/td> 1996K
代理商: 83C795
Disabling the Link Integrity Test (LIT) forces the
83C795 to select the twisted-pair interface. When
LIT is enabled, the twisted-pair interface will be
automatically selected when link activity is found
and the AUI interface will be selected when the
twisted-pair link enters the 10BASE-T link fail state.
5.1.17 ERFAL - Early Receive Fail Address
Low Register
Read/Write Port = OE SWH = 1
This register contains the lower eight bits for the
address at which the early-receive logic detected
an underrun. This register also contains a control
bit for the Plug and Play logic.
BIT
ERFAL
ERFA7
ERFA6
ERFA5
ERFA4
ERFA3
ERFA2
PNPEN
RESET
0
1
RECALL
0
EE
7
6
5
4
3
2
1
0
Bits 7-2: ERFA7-2
, Early Receive Failure Address
This register contains the lower eight bits of the
address where the early receive logic detected an
underrun. The comparison has a granularity of 4
bytes so the least significant two bits are zero. This
value is read-only.
Bit 0: PNPEN
, Plug and Play Enable
When PNPEN = 1 along with the installation of
J UMPER6, Plug and Play logic is enabled. This bit
is readable but can only be set by the initial EEROM
load.
5.1.18 ERFAH - Early Receive Fail Address
High Register
Read/Write Port = OF SWH = 1
This register contains the higher eight bits for the
address at which the early receive logic detected
an underrun.
BIT
ERFAH
ERFA15
ERFA14
ERFA13
ERFA12
ERFA11
ERFA10
ERFA09
ERFA08
RESET
RECALL
7
6
5
4
3
2
1
0
Bits 7-0: ERFA15-8
, Early Receive Failure Address
This register contains the higher eight bits of the
address where the early receive logic detected an
underrun.
83C795
ETHERNET SYSTEM CONTROLLER REGISTERS
22
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