PC97338VLJ datasheet(63/221 Pages) NSC

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2.3.31 SIO Base Address Low Byte

This register holds the low address bits of the base

address of the SuperI/O chip, i.e., the Chip. These

bits are also the low address bits of the INDEX regis-

ter.

The address of the DATA register is the next consec-

utive address after the address of the INDEX register.

The reset value of SBAL depends on the values of

BADDR0 and BADDR1 during reset. See Table 25.

For more details about programming the Chip’s base

address, see Section 2.2.5 on page 38.

It is the software’s responsibility to configure all devic-

es so as to avoid conflicts.

TABLE 25. SBAL Reset Values

FIGURE 33. SBAL Register Bitmap

2.3.32 SIO Base Address High Byte

This register holds the high address bits of the base

address of the SuperI/O chip, i.e., the Chip. These

bits are also the high address bits of the INDEX reg-

ister.

The address of the DATA register is the next consec-

utive address after the address of the INDEX register.

The reset value of SBAH depends on the values of

BADDR0 and BADDR1 during reset. See Table 26.

For more details about programming the Chip’s base

address see Section 2.2.5 on page 38.

It is the software’s responsibility to configure all devic-

es so as to avoid conflicts.

TABLE 26. SBAH Reset Values

FIGURE 34. SBAH Register Bitmap

2.3.33 System IRQ Input 1 Configuration

This register allows configuration of the SIRQI1 sig-

nal. It is initialized to x0x00000 during reset.

FIGURE 35. SIRQ1 Register Bitmap

BADDR1

BADDR0

SBAL Reset Value

98h

Undefined

5Ch

2Eh

543

Reset

Required

Reserved

(SBAL)

SuperI/O Chip Base Address

Index 4Ah

Low Byte Register

BADDR1

BADDR0

SBAH Reset Values

03h

Undefined

01h

00h

A10

A11

A12

A13

A14

A15

Reserved

A10

Reserved

Address Length

654

Reset

Required

11 Bits

16 bits

CFG0 = 1

CFG0 = 0

(SBAH)

SuperI/O Chip Base Address

Index 4Bh

High Byte Register

543

Reset

Required

(SIRQ1)

System IRQ Input 1

Index 4Ch

Configuration Register

Invert SIRQI1

SIRQI1 Status

Select IRQ15, SIRQI1 or DRQ3

SIRQI1 Mapping

PC97338VLJ Datasheet(PDF) 63 Page - National Semiconductor (TI)

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