PC87413 datasheet(48/257 Pages) NSC

48 / 257 page

3.0 Device Architecture and Configuration (Continued)

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Revision1.2

3.6

The following abbreviations are used to indicate the Register Type:

R/W

= Read/Write.

= Read from a speciﬁc register (write to the same address is to a different register).

= Write (see above).

= Read Only.

= Write Only. Reading from the bit returns 0.

R/W1C = Read/Write 1 to Clear. Writing 1 to a bit clears it to 0. Writing 0 has no effect.

R/W1S = Read/Write 1 to Set. Writing 1 to a bit sets its value to 1. Writing 0 has no effect.

In the registers below, use one of the following methods to handle the Reserved bits:

Write 0 to reserved bits, unless another “required value” is speciﬁed. This method can be used for registers contain-

ing bits of all types.

Use read-modify-write to preserve the values of the reserved bits. This method can be used only for registers con-

taining bits of R/W, RO, R/W1C and R/W1S types.

3.7

SERVERI/O CONFIGURATION REGISTERS

This section describes the ServerI/O configuration and ID registers (those registers with first level indexes in the range of

20h - 2Eh). See Table 16 for a summary and directory of these registers.

Table 16. ServerI/O Conﬁguration Registers

Index

Mnemonic

Power Well

Type

Section

20h

SID

ServerI/O ID

VSB

3.7.1

21h

SIOCF1

ServerI/O Conﬁguration 1

VSB

Varies per bit

3.7.2

22h

SIOCF2

ServerI/O Conﬁguration 2

VSB

R/W or RO

3.7.3

23h

SIOCF3

ServerI/O Conﬁguration 3

VSB

R/W or RO

3.7.4

24h

SIOCF4

ServerI/O Conﬁguration 4

VSB

R/W or RO

3.7.5

25h

SIOCF5

ServerI/O Conﬁguration 5

VSB

R/W or RO

3.7.6

26h

SIOCF6

ServerI/O Conﬁguration 6

VSB

Varies per bit

3.7.7

27h

SRID

ServerI/O Revision ID

VSB

3.7.8

28h

SIOCF8

ServerI/O Conﬁguration 8

VSB

R/W

3.7.9

29h

CLOCKCF Clock Generator Configuration

VSB

Varies per bit

3.7.10

2Ah

ACBCF

ACCESS.bus Configuration

VPP

R/W or RO

3.7.11

2Bh - 2Fh Reserved for National use

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