NXP Semiconductors LPC43 Series User Manual

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NXP Semiconductors LPC43 Series User Manual Manual pdf 987 page image

UM10503 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved.User manual Rev. 1.3 — 6 July 2012 987 of 1269NXP Semiconductors UM10503Chapter 38: LPC43xx UART138.6.4 UART1 Interrupt Enable Register (when DLAB = 0)The IER is used to enable the four UART1 interrupt sources.Table 851: UART1 Divisor Latch LSB Register when DLAB = 1 (DLL - address 0x4008 2000) bit descriptionBit Symbol Description Reset value7:0 DLLSB Divisor Latch LSB.The UART1 Divisor Latch LSB Register, along with the DLM register, determines the baudrate of the UART1.0x0131:8 - Reserved, user software should not write ones to reserved bits. The value read from areserved bit is not defined.NATable 852: UART1 Divisor Latch MSB Register when DLAB = 1 (DLM - address 0x4008 2004) bit descriptionBit Symbol Description Reset value7:0 DLMSB Divisor Latch MSB.The UART1 Divisor Latch MSB Register, along with the DLL register, determines the baudrate of the UART1.0x0031:8 - Reserved, user software should not write ones to reserved bits. The value read from areserved bit is not defined.NATable 853: UART1 Interrupt Enable Register when DLAB = 0 (IER - address 0x4008 2004) bit descriptionBit Symbol Value Description Resetvalue0 RBRIE RBR Interrupt Enable. Enables the Receive Data Available interrupt for UART1. It alsocontrols the Character Receive Time-out interrupt.00 Disable the RDA interrupts.1 Enable the RDA interrupts.1 THREIE THRE Interrupt Enable. Enables the THRE interrupt for UART1. The status of thisinterrupt can be read from LSR[5].00 Disable the THRE interrupts.1 Enable the THRE interrupts.2 RXIE RX Line Interrupt Enable. Enables the UART1 RX line status interrupts. The status ofthis interrupt can be read from LSR[4:1].00 Disable the RX line status interrupts.1 Enable the RX line status interrupts.3 MSIE Modem Status Interrupt Enable. Enables the modem interrupt. The status of thisinterrupt can be read from MSR[3:0].00 Disable the modem interrupt.1 Enable the modem interrupt.6:4 - Reserved, user software should not write ones to reserved bits. The value read from areserved bit is not defined.NA