UM10375 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
User manual Rev. 3 — 14 June 2011 184 of 368
NXP Semiconductors
UM10375
Chapter 12: LPC13xx UART
12.6.4 UART Interrupt Enable Register (U0IER - 0x4000 8004, when
DLAB = 0)
The U0IER is used to enable the four UART interrupt sources.
Table 196. UART Divisor Latch LSB Register (U0DLL - address 0x4000 8000 when DLAB = 1)
bit description
Bit Symbol Description Reset value
7:0 DLLSB The UART Divisor Latch LSB Register, along with the U0DLM
register, determines the baud rate of the UART.
0x01
31:8 - Reserved -
Table 197. UART Divisor Latch MSB Register (U0DLM - address 0x4000 8004 when
DLAB = 1) bit description
Bit Symbol Description Reset value
7:0 DLMSB The UART Divisor Latch MSB Register, along with the U0DLL
register, determines the baud rate of the UART.
0x00
31:8 - Reserved -
Table 198. UART Interrupt Enable Register (U0IER - address 0x4000 8004 when DLAB = 0) bit
description
Bit Symbol Value Description Reset
value
0 RBRIE Interrupt Enable. Enables the Receive Data Available
interrupt for UART. It also controls the Character
Receive Time-out interrupt.
0
0 Disable the RDA interrupt.
1 Enable the RDA interrupt.
1 THREIE Interrupt Enable. Enables the THRE interrupt for UART.
The status of this interrupt can be read from U0LSR[5].
0
0 Disable the THRE interrupt.
1 Enable the THRE interrupt.
2 RXLIE Line Interrupt Enable. Enables the UART RX line status
interrupts. The status of this interrupt can be read from
U0LSR[4:1].
0
0 Disable the RX line status interrupts.
1 Enable the RX line status interrupts.
3 - - Reserved -
6:4 - Reserved, user software should not write ones to
reserved bits. The value read from a reserved bit is not
defined.
-
7 - - Reserved 0
8 ABEOINTEN Enables the end of auto-baud interrupt. 0
0 Disable end of auto-baud Interrupt.
1 Enable end of auto-baud Interrupt.
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