FDC37B78X 查看數據表（PDF） - SMSC -> Microchip

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FDC37B78X

Enhanced Super I/O Controller with ACPI Support, Real Time Clock and Consumer IR

SMSC -> Microchip 

Logical Device Configuration/Control Registers [0x30-0xFF]

Used to access the registers that are assigned to each logical unit. This chip supports eight logical

units and has eight sets of logical device registers. The eight logical devices are Floppy, Parallel Port,

Serial Port 1 and Serial Port 2, Real Time Clock, Keyboard Controller, Auxiliary I/O and ACPI. A

separate set (bank) of control and configuration register exists for each logical device and is selected

with the Logical Device # Register (0x07).

The INDEX PORT is used to select a specific logical device register. These registers are then

accessed through the DATA PORT.

The Logical Device registers are accessible only when the device is in the Configuration State. The

logical register addresses are:

Logical Device Registers

LOGICAL DEVICE

REGISTER

Activate Note1

Default = 0x00

on Vcc POR or

Reset_Drv Note 2

Logical Device

Control

Logical Device

Control

Mem Base Addr

I/O Base Addr.

(see Device Base

I/O Address Table)

Default = 0x00

on Vcc POR or

Reset_Drv

TABLE 72 - CHIP LEVEL REGISTERS

ADDRESS

(0x30)

DESCRIPTION

Bits[7:1] Reserved, set to zero.

Bit[0]

= 1 Activates the logical device currently selected

through the Logical Device # register.

= 0 Logical device currently selected is inactive

STATE

C

(0x31-0x37) Reserved - Writes are ignored, reads return 0.

C

(0x38-0x3f) Vendor Defined - Reserved - Writes are ignored, C

reads return 0.

(0x40-0x5F) Reserved - Writes are ignored, reads return 0.

C

(0x60-0x6F) Registers 0x60 and 0x61 set the base address for C

the device. If more than one base address is

0x60,2,... = required, the second base address is set by

addr[15:8] registers 0x62 and 0x63.

Unused registers will ignore writes and return zero

0x61,3,... = when read.

addr[7:0]

180

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