參數(shù)資料
型號: CDK8920A
廠商: Cirrus Logic, Inc.
英文描述: CRYSTAL LAN ISA PLUG-AND-PLAY ETHERNET CONTROLLER
中文描述: 水晶藍(lán)的ISA即插即用,即插即用以太網(wǎng)控制器
文件頁數(shù): 69/144頁
文件大小: 1229K
代理商: CDK8920A
Register 1C: AUI Time Domain Reflectometer (Read-only)
Address: PacketPage base + 013Ch
F-6
5-0
AUI_Delay
011100
The TDR counter (Bits 6 through F) is a time domain reflectometer useful in locating cable faults in 10BASE-2
and 10BASE-5 coax networks. It counts at a 10-MHz rate from the beginning of transmission on the AUI to when
a collision or Loss-of-Carrier error occurs. The TDR counter is cleared when read.
BIT
NAME
DESCRIPTION
5-0
011100
These bits provide an internal address used by the CS8920A to identify this as the
Bus Status Register. When reading this register, these bits will be 011100, where the
LSB corresponds to Bit 0.
F-6
AUI-Delay
The upper ten bits contain the number of 10-MHz clock periods between the beginning
of transmission on the AUI to when a collision or Loss-of-Carrier error occurs.
This register’s initial state after reset is:
0000 0000
0001 1100
CS8920A
DS238PP2
69
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