CS8920 datasheet(7/66 Pages) CIRRUS

7 / 66 page

AN84REV1

CS8920 Technical Reference Manual

The hardware design considerations for

both motherboards and adapter cards are

discussed in Chapter 2.0. The EEPROM

programming considerations are described

in Chapter 3.0. The current CS8920 data

sheet can be found in section 6.0.

Crystal provides a complete set of device

drivers, as discussed in Chapter 4.0. The

drivers reside between the networking

operating system (NOS) and the CS8920.

On the CS8920 side, the drivers understand

how to program and read the CS8920

control and status registers, and how to

transfer user data between the CS8920 and

the PC main memory via the ISA bus. On

the NOS side, the drivers provide the

standardized services and functions

required by the NOS, and hide all details of

the CS8920 hardware from the NOS. The

EEPROM device programs the CS8920

whenever a hardware reset occurs, and call

also store state/configuration information

for the driver.

Crystal’s Software Driver Distribution

Policy is as follows. This developer kit

contains a single-user copy of object code

which is available only for internal testing

and evaluation purposes. This object code

may not be distributed without first signing

a LICENSE FOR DISTRIBUTION OF

EXECUTABLE SOFTWARE, which may

be obtained by contacting your sales

representative. The LICENSE FOR

DISTRIBUTION OF EXECUTABLE

SOFTWARE gives you unlimited, royalty-

free rights to distribute Crystal-provided

object code.

The drivers supported are shown in Table

1.1.

O per at ing S y s t em S o f t w ar e

e.g. , F ile M anager

C S 8920 R egis t er s & M e m o r y

C S 8920- s pec if ic dev ic e dr iv er s :

e.g. , N D I S & O D I c o m pat ib le dr iv er s

N e tw or k O per at in g S y s t em

e. g. , N o v e ll or M ic r os of t

A pplic ations

EEPR O M

Figure 1.2 - Software Application Su mmary

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