參數(shù)資料
型號： LPC2919
廠商： NXP Semiconductors N.V.
元件分類： 32位微控制器
英文描述： ARM9 microcontroller with CAN and LIN
中文描述： 具有CAN和LIN的ARM9微控制器
文件頁數(shù)： 24/68頁
文件大?。?/td> 384K
代理商： LPC2919
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LPC2917_19_1
NXP B.V. 2007. All rights reserved.
Preliminary data sheet
Rev. 1.01 — 15 November 2007
24 of 68
NXP Semiconductors
LPC2917/19
ARM9 microcontroller with CAN and LIN
CLK_SAFE see
Section 7.2.2
8.4.2
Watchdog timer
8.4.2.1
Overview
The purpose of the watchdog timer is to reset the ARM9 processor within a reasonable
amount of time if the processor enters an error state. The watchdog generates a system
reset if the user program fails to trigger it correctly within a predetermined amount of time.
Key features:
Internal chip reset if not periodically triggered
Timer counter register runs on always-on safe clock
Optional interrupt generation on watchdog timeout
Debug mode with disabling of reset
Watchdog control register change-protected with key
Programmable 32-bit watchdog timer period with programmable 32-bit prescaler.
8.4.2.2
Description
The watchdog timer consists of a 32-bit counter with a 32-bit prescaler.
The watchdog should be programmed with a time-out value and then periodically
restarted. When the watchdog times out it generates a reset through the RGU.
To generate watchdog interrupts in watchdog debug mode the interrupt has to be enabled
via the interrupt enable register. A watchdog-overflow interrupt can be cleared by writing
to the clear-interrupt register.
Another way to prevent resets during debug mode is via the Pause feature of the
Watchdog Timer. The watchdog is stalled when the ARM9 is in debug mode and the
PAUSE_ENABLE bit in the Watchdog Timer Control register is set.
The Watchdog Reset output is fed to the Reset Generator Unit (RGU). The RGU contains
a reset source register to identify the reset source when the device has gone through a
reset. See
Section 8.8.5
.
8.4.2.3
Pin description
The watchdog has no external pins.
8.4.2.4
Watchdog timer clock description
The Watchdog Timer is clocked by two different clocks; CLK_SYS_PESS and
CLK_SAFE, see
Section 7.2.2
. The register interface towards the system bus is clocked
by CLK_SYS_PESS. The timer and prescale counters are clocked by CLK_SAFE which
is always on.
8.4.3
Timer
8.4.3.1
Overview
The LPC2917/19 contains six identical timers: four in the peripheral subsystem and two in
the Modulation and Sampling Control SubSystem (MSCSS) located at different peripheral
base addresses. This section describes the four timers in the peripheral subsystem. Each
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LPC2919/01 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:ARM9 microcontroller with CAN and LIN
LPC2919FBD144 制造商:NXP Semiconductors 功能描述:IC MCU 32BIT ARM968 SMD LQFP144
LPC2919FBD144,551 功能描述:ARM微控制器 - MCU ARM968 768K FL/48K RAM LIN 2.0 RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 處理器系列:STM32F373xx 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:72 MHz 程序存儲器大小:256 KB 數(shù)據(jù) RAM 大小:32 KB 片上 ADC:Yes 工作電源電壓:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:LQFP-48 安裝風(fēng)格:SMD/SMT
LPC2919FBD144/01 制造商:NXP Semiconductors 功能描述:MCU, 32BIT, ARM968E-S, 125MHZ, LQFP-144 制造商:NXP Semiconductors 功能描述:MCU, 32BIT, ARM968E-S, 125MHZ, LQFP-144, Controller Family/Series:LPC2900, Core Size:32bit, No. of I/O's:108, Supply Voltage Min:1.71V, Supply Voltage Max:1.89V, Digital IC Case Style:LQFP, No. of Pins:144, Program Memory Size:768KB,
LPC2919FBD144/01/ 制造商:NXP Semiconductors 功能描述:MCU ARM9 144LQFP
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