CS4210 datasheet(68/102 Pages) NSC

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4.4.13 Self-ID Buffer Pointer Register

The Self-ID Buffer Pointer register (Table 4-23) points to

thebufferthe Self-ID packets areDMA’edintoduringbus

initialization.

4.4.14 Self-ID Count Register

The Self-ID Count register (Table 4-24) keeps a count of

the number of times the bus Self-ID process has occurred,

flags Self-ID packet errors and keeps a count of the

amount of Self-ID data in the Self-ID buffer.

Table 4-23. BAR0+Offset 64h: Self-ID Buffer Pointer Register

Bit

Name

Access

Reset

Description

31:11

selfIDBufferPtr

Undef

Self-ID Buffer Pointer: Contains the 2 KB aligned base address of the

buffer in host memory where received Self-ID packets are stored. The con-

tents of this field are undefined after a chip reset.

10:0

RSVD

Reserved

Table 4-24. BAR0+Offset 68h: Self-ID Count Register

Bit

Name

Access

Reset

Description

selfIDError

Undef

Self-ID Error: When this bit is one, an error was detected during the most

recent Self-ID packet reception. The contents of the Self-ID buffer are unde-

fined. This bit is cleared after a Self-ID reception in which no errors are

detected. Note that an error can be a hardware error or a host bus write

error.

30:24

RSVD

Reserved

23:16

selfIDGeneration

Undef

Self-ID Generation: The value in this field increments each time a bus

reset is detected. This field rolls over to 0 after reaching 255.

15:13

RSVD

Reserved

12:2

2selfIDSize

Undef

Quadlet Self-ID Size: This field indicates the number of quadlets that have

been written into the Self-ID buffer for the current Self-ID Generation. This

includes the header quadlet and the Self-ID data. This field is cleared to

zero as soon as a bus reset is detected.

1:0

RSVD

Reserved

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