LPC47M192 datasheet(181/228 Pages) SMSC

181 / 228 page

SMSC DS – LPC47M192

Page 181

Rev. 03/30/05

DATASHEET

UART Interrupt Operation Table

Table 73 - Serial Port 2, Logical Device 5 [Logical Device Number = 0x05]

NAME

REG INDEX

DEFINITION

Serial Port 2

Mode Register

Default = 0x00

on VCC POR,

VTR POR and

PCI RESET

Bit[5] reset on

VTR POR only

0xF0 R/W

Bit[0] MIDI Mode

= 0 MIDI support disabled (default)

= 1 MIDI support enabled

Bit[1] High Speed

= 0 High Speed disabled(default)

= 1 High Speed enabled

Bit[4:2] Reserved, set to zero

Bit[5] TXD2_MODE (Note 1)

=0 The inactive state of the TXD2 pin is low.

=1 The inactive state of the TXD2 pin is tristate.

Bits[7:6] Reserved. Set to zero.

IR Option Register

Default = 0x02

on VCC POR,

VTR POR and

PCI RESET

0xF1 R/W

Bit[0] Receive Polarity

= 0 Active High (Default)

= 1 Active Low

Bit[1] Transmit Polarity

= 0 Active High

= 1 Active Low (Default)

Bit[2] Duplex Select

= 0 Full Duplex (Default)

= 1 Half Duplex

Bits[5:3] IR Mode

= 000

Standard COM Functionality (Default)

= 001

IrDA

= 010

ASK-IR

= 011

Reserved

= 1xx

Reserved

Bit[6] IR Location Mux

= 0 Use Serial port TXD2 and RXD2 (Default)

= 1 Use alternate IRRX2 (pin 61) and IRTX2 (pin 62).

Bit[7] Reserved, write 0.

Half

Duplex

Timeout

Default = 0x03

on VCC POR,

VTR POR and

PCI RESET

0xF2

Bits [7:0]

These bits set the half duplex time-out for the IR port.

This value is 0 to 10msec in 100usec increments.

0= blank during transmit/receive

1= blank during transmit/receive + 100usec

Note 1

: The TXD2_MODE bit is a VTR powered bit that is reset on VTR POR only.

Table 74 - KYBD, Logical Device 7 [Logical Device Number = 0x07]

NAME

REG INDEX

DEFINITION

KRST_GA20

Default = 0x00

on VCC POR,

VTR POR and

PCI RESET

0xF0

R/W

KRESET and GateA20 Select

Bit[7] Polarity Select for P12

= 0 P12 active low (default)

= 1 P12 active high

Bit[6] M_ISO. Enables/disables isolation of mouse

signals into 8042. Does not affect MDAT signal to

mouse wakeup (PME) logic.

LPC47M192 Datasheet(PDF) 181 Page - SMSC Corporation

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