CS8900A
Crystal LAN™ ISA Ethernet Controller
9.3 Acronyms Specific to the CS8900A
BufCFG
BufEvent
BusCTL
BusST
Buffer Configuration - Register B
Buffer Event - Register C
Bus Control - Register 17
Bus State - Register 18
ENDEC
ISQ
Manchester encoder/decoder
Interrupt Status Queue - register 0
Ethernet Line Control - Register 13
Ethernet Line Status - Register 14
Receive Configuration - Register 3
Receive Control - Register 5
Receive Event - Register 4
Self Control - Register 15
LineCTL
LineST
RxCFG
RxCTL
RxEvent
SelfCTL
SelfST
Self Status - Register 16
TestCTL
TxCFG
TxCMD
TxEvent
Test Control - Register 19
Transmit Configuration - Register 7
Transmit Command - Register 9
Transmit Event - Register 8
9.4 Terms Specific to the CS8900A
Act-Once bit
A control bit that causes the CS8900A to take a certain action once when a logic "1" is written
to that bit. To cause the action again, the host must rewrite a "1".
Committed Receive Frame
A receive frame is said to be "committed" after the frame has been buffered by the CS8900A,
and the host has been notified, but the frame has not yet been transferred by the host.
Committed Transmit Frame
A transmit frame is said to be "committed" after the host has issued a Transmit Command, and
the CS8900A has reserved buffer space and notified the host that it is ready for transmit.
Event or Interrupt Event
The term "Event" is used in this document to refer to something that can trigger an interrupt.
Items that are considered "Events" are reported in the three Event registers (RxEvent, TxEvent,
or BufEvent) and in two counter-overflow bits (RxMISS and TxCOL).
StreamTransfer
A method used to significantly reduce the number of interrupts to the host processor during
block data transfers (Patent Pending).
PacketPage
A unified, highly-efficient method of controlling and getting status of a peripheral controller in
I/O or Memory space.
CIRRUS LOGIC PRODUCT DATA SHEET
DS271PP3
125
CIRRUS [ CIRRUS LOGIC ]
