Table 71 – Serial Port 2, Logical Device 5 [Logical Device Number = 0x05]
NAME
REG INDEX
DEFINITION
STATE
IR Option Register
0xF1 R/W Bit[0] Receive Polarity
C
= 0
= 1
Active High (Default)
Active Low
Default = 0x02
on VCC POR,
VTR POR and
HARD RESET
Bit[1] Transmit Polarity
= 0
= 1
Active High
Active Low (Default)
Bit[2] Duplex Select
= 0
= 1
Full Duplex (Default)
Half Duplex
Bits[5:3] IR Mode
= 000
= 001
= 010
= 011
= 1xx
Standard COM Functionality (Default)
IrDA
ASK-IR
Reserved
Reserved
Bit[6] IR Location Mux
= 0
= 1
Use Serial port TXD2 and RXD2 (Default)
Use alternate IRRX2 (pin 61) and IRTX2 (pin
62).
Bit[7] Reserved, write 0.
Bits [7:0]
IR
Half
Duplex
0xF2
Timeout
These bits set the half duplex time-out for the IR port.
This value is 0 to 10msec in 100usec increments.
Default = 0x03
on VCC POR,
VTR POR and
HARD RESET
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.
SMSC DS – LPC47M14X
Page 167
Rev. 03/19/2001
SMSC [ SMSC CORPORATION ]
