LPC47M14X datasheet(165/205 Pages) SMSC

165 / 205 page

SMSC DS – LPC47M14X

Page 165

Rev. 03/19/2001

Table 68 – Floppy Disk Controller, Logical Device 0 [Logical Device Number = 0x00]

NAME

REG INDEX

DEFINITION

STATE

FDD0

Default = 0x00

on VCC POR,

VTR POR and

HARD RESET

0xF4 R/W

Bits[1:0] Drive Type Select: DT1, DT0

Bits[2] Read as 0 (read only)

Bits[4:3] Data Rate Table Select: DRT1, DRT0

Bits[5] Read as 0 (read only)

Bits[6] Precompensation Disable PTS

=0 Use Precompensation

=1 No Precompensation

Bits[7] Read as 0 (read only)

FDD1

0xF5 R/W

Refer to definition and default for 0xF4

Table 69 – Parallel Port, Logical Device 3 [Logical Device Number = 0x03]

NAME

REG INDEX

DEFINITION

STATE

PP Mode Register

Default = 0x3C

on VCC POR,

VTR POR and

HARD RESET

0xF0 R/W

Bits[2:0] Parallel Port Mode

= 100

Printer Mode (default)

= 000

Standard and Bi-directional (SPP) Mode

= 001

EPP-1.9 and SPP Mode

= 101

EPP-1.7 and SPP Mode

= 010

ECP Mode

= 011

ECP and EPP-1.9 Mode

= 111

ECP and EPP-1.7 Mode

Bit[6:3] ECP FIFO Threshold

0111b (default)

Bit[7] PP Interrupt Type

Not valid when the parallel port is in the Printer

Mode (100) or the Standard & Bi-directional Mode

(000).

= 1

Pulsed Low, released to high-Z.

= 0

IRQ follows nACK when parallel port in EPP

Mode or [Printer, SPP, EPP] under ECP.

IRQ level type when the parallel port is in ECP, TEST,

or Centronics FIFO Mode.

PP Mode Register 2

Default = 0x00

on VCC POR,

VTR POR and

HARD RESET

0xF1 R/W

Bits[3:0] Reserved. Set to zero

Bit [4] TIMEOUT_SELECT

= 0

TMOUT (EPP Status Reg.) cleared on write of

‘1’ to TMOUT.

= 1

TMOUT cleared on trailing edge of read of

EPP Status Reg.

Bits[7:5] Reserved. Set to zero.

LPC47M14X Datasheet(PDF) 165 Page - SMSC Corporation

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