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STR720RBQ6 bảng dữ liệu(PDF) 51 Page - STMicroelectronics

tên linh kiện STR720RBQ6
Giải thích chi tiết về linh kiện  ARM720T 16/32-BIT MCU WITH 16K RAM, USB, CAN, 3 TIMERS, ADC, 6 COMMUNICATIONS INTERFACES
PDF  401 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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STR720RBQ6 bảng dữ liệu(HTML) 51 Page - STMicroelectronics

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STR720 - ENHANCED INTERRUPT CONTROLLER (EIC)
51/401
7 ENHANCED INTERRUPT CONTROLLER (EIC)
7.1 Introduction
The ARM720T CPU provides two levels of interrupt, FIQ (Fast Interrupt Request) for fast, low
latency interrupt handling and IRQ (Interrupt Request) for more general interrupts.
Hardware handling of multiple interrupt channels, interrupt priority and automatic vectorization
require therefore a separate Enhanced Interrupt Controller (EIC).
7.2 Main Features
■
32 maskable interrupt channels, mapped on ARM’s interrupt request pin IRQ
■
16 programmable priority levels for each interrupt channels mapped on IRQ
■
hardware support for interrupt nesting (16 levels)
■
3 maskable interrupt channels, mapped on ARM’s interrupt request pin FIQ, with neither
priority nor vectorization
Figure 7. EIC block diagram
IRQ0
IRQ1
IRQ31
IER0-IER1
FIQ0
FIQ1
FIR
FIQ
control logic
IRQ
control logic
FIQ request
IRQ request
STACK CTL (PUSH/POP)
PRIORITY
STACK
(16 ENTRY)
CIPR
FIQ to
ARM720T
Highest Priority Interrupt
SIR
(32 ENTRY)
IRQx
VECTOR
IE0
IE1
IE31
IP0
IP1
IP31
IPR0-IPR1
FIE[0]
FIE[1]
FIR
FIP[0]
FIP[1]
IRQ_EN
ICR
FIQ_EN
SIRn(31:16)
IVR(31:16)
Interrupt from line IRQx
IVR
IRQ to
ARM720T
FIE[2]
FIP[2]
FIQ2
1



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