LPC47M172 SMSC Corporation, LPC47M172 Datasheet - Page 192

• Manufacturer Part Number: LPC47M172
• Description: ADVANCED I/O CONTROLLER WITH MOTHERBOARD GLUE LOGIC
• Manufacturer: SMSC Corporation

Advanced I/O Controller with Motherboard GLUE Logic
Datasheet
SMSC/Non-SMSC Register Sets (Rev. 02-27-04)
IR Option Register
Default = 0x02
on VCC POR,
VTR POR and
HARD RESET
IR Half Duplex Timeout
Default = 0x03
on VCC POR,
VTR POR and
HARD RESET
PP Mode Register
Default = 0x3C
on VCC POR,
VTR POR and
HARD RESET
NAME
NAME
Table 11.11 - Parallel Port Logical Device Configuration Registers
REG INDEX
REG INDEX
0xF0 R/W
0xF1 R/W
0xF2
DATASHEET
Bits[2:0] Parallel Port Mode
= 100
= 000
= 001
= 101
= 010
= 011
= 111
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.
Bit[0] Receive Polarity
= 0
= 1
Bit[1] Transmit Polarity
= 0
= 1
Bit[2] Duplex Select
= 0
= 1
Bits[5:3] IR Mode
= 000
= 001
= 010
= 011
= 1xx
Bit[6] IR Location Mux
= 0
= 1
Bit[7] Reserved, write 0.
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
. . .
Page 192
Printer Mode (default)
Standard and Bi-directional (SPP) Mode
EPP-1.9 and SPP Mode
EPP-1.7 and SPP Mode
ECP Mode
ECP and EPP-1.9 Mode
ECP and EPP-1.7 Mode
Active High (Default)
Active Low
Full Duplex (Default)
Standard COM Functionality (Default)
IrDA
ASK-IR
Reserved
Reserved
Use Serial port TXD2 and RXD2 (Default). The
IRTX2 pin is low.
Use alternate IRRX2 and IRTX2 pins. The TXD2
pin is tri-state.
Active High
Active Low (Default)
Half Duplex
DEFINITION
DEFINITION
SMSC LPC47M172