LPC47M14X datasheet(160/205 Pages) SMSC

160 / 205 page

SMSC DS – LPC47M14X

Page 160

Rev. 03/19/2001

Table 64 – Logical Device Registers

LOGICAL DEVICE

ADDRESS

DESCRIPTION

STATE

Interrupt Select

Defaults :

0x70 = 0x00 or 0x06

(Note 3)

on VCC POR, VTR POR,

HARD RESET and

SOFT RESET

0x72 = 0x00,

on VCC POR, VTR POR,

HARD RESET and

SOFT RESET

(0x70,0x72)

0x70 is implemented for each logical device.

Refer to Interrupt Configuration Register

description. Only the keyboard controller uses

Interrupt Select register 0x72. Unused register

(0x72) will ignore writes and return zero when

read.

Interrupts default to edge high (ISA

compatible).

(0x71,0x73)

Reserved - not implemented. These register

locations ignore writes and return zero when

read.

DMA Channel Select

Default = 0x02 or 0x04

(Note 4)

on VCC POR, VTR POR,

HARD RESET and

SOFT RESET

(0x74,0x75)

Only 0x74 is implemented for FDC and Parallel

port. 0x75 is not implemented and ignores

writes and returns zero when read. Refer to

DMA Channel Configuration.

32-Bit

Memory

Space

Configuration

(0x76-0xA8)

Reserved - not implemented. These register

locations ignore writes and return zero when

read.

Logical Device

(0xA9-0xDF)

Reserved - not implemented. These register

locations ignore writes and return zero when

read.

Logical

Device

Configuration

(0xE0-0xFE)

Reserved – Vendor Defined (see SMSC

defined

Logical

Device

Configuration

Registers).

Reserved

0xFF

Reserved

Note 1: A logical device will be active and powered up according to the following equation unless otherwise specified:

DEVICE ON (ACTIVE) = (Activate Bit SET or Pwr/Control Bit SET).

The Logical device's Activate Bit and its Pwr/Control Bit are linked such that setting or clearing one sets or

clears the other.

Note 2: If the I/O Base Addr of the logical device is not within the Base I/O range as shown in the Logical Device I/O

map, then read or write is not valid and is ignored.

Note 3: The default value of the Primary Interrupt Select register for logical device 0 is 0x06.

Note 4: The default value of the DMA Channel Select register for logical device 0 (FDD) is 0x02 and for logical device

3 and 5 is 0x04.

LPC47M14X Datasheet(PDF) 160 Page - SMSC Corporation

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