UM10503
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© NXP B.V. 2015. All rights reserved.
User manual
Rev. 2.1 — 10 December 2015
1132 of 1441
NXP Semiconductors
UM10503
Chapter 40: LPC43xx/LPC43Sxx USART0_2_3
40.6.11 IrDA Control Register (USART3)
The IrDA Control Register enables and configures the IrDA mode for USART3 only. The
value of U3ICR should not be changed while transmitting or receiving data, or data loss or
corruption may occur.
Remark:
IrDA is available on USART3 only.
Table 936. Autobaud Control Register (ACR, addresses 0x4008 1020 (USART0), 0x400C 1020
(USART2), 0x400C 2020 (USART3)) bit description
Bit
Symbol
Value
Description
Reset
value
0
START
Start bit.
This bit is automatically cleared after auto-baud
completion.
0
0
Stop. Auto-baud stop (auto-baud is not running).
1
Start. Auto-baud start (auto-baud is running).
Auto-baud run bit. This bit is automatically cleared
after auto-baud completion.
1
MODE
Auto-baud mode select bit.
0
0
Mode 0.
1
Mode 1.
2
AUTORESTART
Restart bit.
0
0
No restart.
1
Restart. Restart in case of time-out (counter restarts
at next USART Rx falling edge)
7:3
-
Reserved, user software should not write ones to
reserved bits. The value read from a reserved bit is
not defined.
0
8
ABEOINTCLR
End of auto-baud interrupt clear bit (write-only).
0
0
No effect. Writing a 0 has no impact.
1
Clear. Writing a 1 will clear the corresponding
interrupt in the IIR.
9
ABTOINTCLR
Auto-baud time-out interrupt clear bit (write-only).
0
0
No effect. Writing a 0 has no impact.
1
Clear. Writing a 1 will clear the corresponding
interrupt in the IIR.
31:10 -
Reserved, user software should not write ones to
reserved bits. The value read from a reserved bit is
not defined.
0
Table 937. IrDA Control Register (ICR, address 0x4000 8024) bit description
Bit
Symbol
Value Description
Reset
value
0
IRDAEN
IrDA mode enable.
0
0
Disabled. IrDA mode on USART3 is disabled, USART3
acts as a standard USART.
1
Enabled. IrDA mode on USART3 is enabled.