參數(shù)資料
型號: TMS320DM355_07
廠商: Texas Instruments, Inc.
英文描述: Digital Media System-on-Chip (DMSoC)
中文描述: 數(shù)字媒體系統(tǒng)芯片(DMSoC)
文件頁數(shù): 63/158頁
文件大?。?/td> 1319K
代理商: TMS320DM355_07
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3.3.2
External Memories
3.3.3
Peripherals
3.4 ARM Interrupt Controller (AINTC)
3.4.1
Interrupt Mapping
TMS320DM355
Digital Media System-on-Chip (DMSoC)
SPRS463B–SEPTEMBER 2007–REVISED OCTOBER 2007
The ARM has access to the following External memories:
DDR2 / mDDR Synchronous DRAM
Asynchronous EMIF / OneNAND
NAND Flash
Flash card devices:
MMC/SD
xD
SmartMedia
The ARM has access to all of the peripherals on the DM355 device.
The DM355 ARM Interrupt Controller (AINTC) has the following features:
Supports up to 64 interrupt channels (16 external channels)
Interrupt mask for each channel
Each interrupt channel can be mapped to a Fast Interrupt Request (FIQ) or to an Interrupt Request
(IRQ) type of interrupt.
Hardware prioritization of simultaneous interrupts
Configurable interrupt priority (2 levels of FIQ and 6 levels of IRQ)
Configurable interrupt entry table (FIQ and IRQ priority table entry) to reduce interrupt processing time
The ARM core supports two interrupt types: FIQ and IRQ. See the ARM926EJ-S Technical Reference
Manual for detailed information about the ARM’s FIQ and IRQ interrupts. Each interrupt channel is
mappable to an FIQ or to an IRQ type of interrupt, and each channel can be enabled or disabled. The
INTC supports user-configurable interrupt-priority and interrupt entry addresses. Entry addresses minimize
the time spent jumping to interrupt service routines (ISRs). When an interrupt occurs, the corresponding
highest priority ISR’s address is stored in the INTC’s ENTRY register. The IRQ or FIQ interrupt routine can
read the ENTRY register and jump to the corresponding ISR directly. Thus, the ARM does not require a
software dispatcher to determine the asserted interrupt.
The AINTC takes up to 64 ARM device interrupts and maps them to either the IRQ or to the FIQ of the
ARM. Each interrupt is also assigned one of 8 priority levels (2 for FIQ, 6 for IRQ). For interrupts with the
same priority level, the priority is determined by the hardware interrupt number (the lowest number has the
highest priority).
Table 3-1
shows the connection of device interrupts to the ARM.
Table 3-1. AINTC Interrupt Connections
(1)
Interrupt
Number
0
Acronym
Source
Interrupt
Number
32
Acronym
Source
VPSSINT0
VPSS - INT0,
Configurable via
VPSSBL register:
INTSEL
VPSS - INT1
VPSS - INT2
VPSS - INT3
VPSS - INT4
TINT0
Timer 0 - TINT12
1
2
3
4
VPSSINT1
VPSSINT2
VPSSINT3
VPSSINT4
33
34
35
36
TINT1
TINT2
TINT3
PWMINT0
Timer 0 - TINT34
Timer 1 - TINT12
Timer 1 - TINT34
PWM0
(1)
The total number of interrupts in DM355 exceeds 64, which is the maximum value of the AINTC module. Therefore, several interrupts
are multiplexed and you must use the register ARM_INTMUX in the System Control Module to select the interrupt source for multiplexed
interrupts. Refer to the ARM Subsystem Guide for more information on the System Control Module register ARM_INTMUX.
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