CS8900A datasheet(125/128 Pages) CIRRUS

125 / 128 page

DS271PP3

125

CS8900A

Crystal LAN™ ISA Ethernet Controller

CIRRUS LOGIC PRODUCT DATA SHEET

9.3 Acronyms Specific to the CS8900A

BufCFG

Buffer Configuration - Register B

BufEvent

Buffer Event - Register C

BusCTL

Bus Control - Register 17

BusST

Bus State - Register 18

ENDEC

Manchester encoder/decoder

ISQ

Interrupt Status Queue - register 0

LineCTL

Ethernet Line Control - Register 13

LineST

Ethernet Line Status - Register 14

RxCFG

Receive Configuration - Register 3

RxCTL

Receive Control - Register 5

RxEvent

Receive Event - Register 4

SelfCTL

Self Control - Register 15

SelfST

Self Status - Register 16

TestCTL

Test Control - Register 19

TxCFG

Transmit Configuration - Register 7

TxCMD

Transmit Command - Register 9

TxEvent

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.

CS8900A Datasheet(PDF) 125 Page - Cirrus Logic

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