参数资料
型号: LPC2294JBD144,551
厂商: NXP Semiconductors
文件页数: 9/54页
文件大小: 0K
描述: IC ARM7 MCU FLASH 256K 144-LQFP
标准包装: 60
系列: LPC2200
核心处理器: ARM7
芯体尺寸: 16/32-位
速度: 60MHz
连通性: CAN,EBI/EMI,I²C,Microwire,SPI,SSI,SSP,UART/USART
外围设备: POR,PWM,WDT
输入/输出数: 112
程序存储器容量: 256KB(256K x 8)
程序存储器类型: 闪存
RAM 容量: 16K x 8
电压 - 电源 (Vcc/Vdd): 1.65 V ~ 3.6 V
数据转换器: A/D 8x10b
振荡器型: 内部
工作温度: -40°C ~ 105°C
封装/外壳: 144-LQFP
包装: 托盘
配用: OM10091-ND - KIT DEV PHYCORE-ARM7/LPC2220
568-1757-ND - BOARD EVAL FOR LPC220X ARM MCU
其它名称: 568-1898
935275728551
LPC2294JBD144-S
LPC2292_2294
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 8 — 8 June 2011
17 of 54
NXP Semiconductors
LPC2292/2294
16/32-bit ARM microcontrollers with external memory interface
6.5 Interrupt controller
The VIC accepts all of the interrupt request inputs and categorizes them as Fast Interrupt
Request (FIQ), vectored Interrupt Request (IRQ), and non-vectored IRQ as defined by
programmable settings. The programmable assignment scheme means that priorities of
interrupts from the various peripherals can be dynamically assigned and adjusted.
FIQ has the highest priority. If more than one request is assigned to FIQ, the VIC
combines the requests to produce the FIQ signal to the ARM processor. The fastest
possible FIQ latency is achieved when only one request is classified as FIQ, because then
the FIQ service routine can simply start dealing with that device. But if more than one
request is assigned to the FIQ class, the FIQ service routine can read a word from the VIC
that identifies which FIQ source(s) is (are) requesting an interrupt.
Vectored IRQs have the middle priority. Sixteen of the interrupt requests can be assigned
to this category. Any of the interrupt requests can be assigned to any of the 16 vectored
IRQ slots, among which slot 0 has the highest priority and slot 15 has the lowest.
Non-vectored IRQs have the lowest priority.
The VIC combines the requests from all the vectored and non-vectored IRQs to produce
the IRQ signal to the ARM processor. The IRQ service routine can start by reading a
register from the VIC and jumping there. If any of the vectored IRQs are requesting, the
VIC provides the address of the highest-priority requesting IRQs service routine,
otherwise it provides the address of a default routine that is shared by all the non-vectored
IRQs. The default routine can read another VIC register to see what IRQs are active.
6.5.1 Interrupt sources
Table 5 lists the interrupt sources for each peripheral function. Each peripheral device has
one interrupt line connected to the VIC, but may have several internal interrupt flags.
Individual interrupt flags may also represent more than one interrupt source.
Table 5.
Interrupt sources
Block
Flag(s)
VIC channel #
WDT
Watchdog Interrupt (WDINT)
0
-
Reserved for software interrupts only
1
ARM Core
EmbeddedICE, DbgCommRx
2
ARM Core
EmbeddedICE, DbgCommTx
3
Timer 0
Match 0 to 3 (MR0, MR1, MR2, MR3)
Capture 0 to 3 (CR0, CR1, CR2, CR3)
4
Timer 1
Match 0 to 3 (MR0, MR1, MR2, MR3)
Capture 0 to 3 (CR0, CR1, CR2, CR3)
5
UART0
RX Line Status (RLS)
Transmit Holding Register Empty (THRE)
RX Data Available (RDA)
Character Time-out Indicator (CTI)
Auto-baud time-out (ABTO)[1]End of auto-baud (ABEO)[1]
6
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