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| 型號： | TMS320F240PQL |
| 英文描述： | 16-Bit Microcontroller |
| 中文描述： | 16位微控制器 |
| 文件頁數(shù)： | 24/105頁 |
| 文件大小： | 1481K |
| 代理商： | TMS320F240PQL |
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TMS320C240, TMS320F240
DSP CONTROLLERS
SPRS042D – OCTOBER 1996 – REVISED NOVEMBER 1998
24
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
hardware-generated interrupts (continued)
Each of the interrupt sources has its own control register with a flag bit and an enable bit. When an interrupt
request is received, the flag bit in the corresponding control register is set. If the enable bit is also set, a signal
is sent to arbitration logic, which can simultaneously receive similar signals from one or more of the other control
registers. The arbitration logic compares the priority level of competing interrupt requests, and it passes the
interrupt of highest priority to the CPU. The corresponding flag is set in the interrupt flag register (IFR), indicating
that the interrupt is pending. The CPU then must decide whether to acknowledge the request. Maskable
hardware interrupts are acknowledged only after certain conditions are met:
Priority is highest.
When more than one hardware interrupt is requested at the same time, the ’x240
services them according to the set priority ranking.
INTM bit is 0.
The interrupt mode (INTM) bit, bit 9 of status register ST0, enables or disables all maskable
interrupts:
–
When INTM = 0, all unmasked interrupts are enabled.
–
When INTM = 1, all unmasked interrupts are disabled.
INTM is set to 1 automatically when the CPU acknowledges an interrupt (except when initiated by the TRAP
instruction) and at reset. It can be set and cleared by software.
IMR mask bit is 1.
To unmask an interrupt line, set its IMR bit to 1.
Each of the maskable interrupt lines has a mask bit in the interrupt mask register (IMR).
When the CPU acknowledges a maskable hardware interrupt, it jams the instruction bus with the INTR
instruction. This instruction forces the PC to the appropriate address from which the CPU fetches the software
vector. This vector leads to an interrupt service routine.
Usually, the interrupt service routine reads the peripheral-vector-address offset from the peripheral-vector-
address register (see Table 7) to branch to code that is meant for the specific interrupt source that initiated the
interrupt request. The ’x240 includes a phantom-interrupt vector offset (0000h), which is a system interrupt
integrity feature that allows a controlled exit from an improper interrupt sequence. If the CPU acknowledges a
request from a peripheral when, in fact, no peripheral has requested an interrupt, the phantom-interrupt vector
is read from the interrupt-vector register.
Table 7 summarizes the interrupt sources, overall priority, vector address/offset, source, and function of each
interrupt available on the TMS320x240.
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| TMS320F240PQS | 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC 32B Dig Sig Cntrllr w/ Flash RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時(shí)鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時(shí)器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT |
| TMS320F241FN | 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC 16B 5V fixed point DSP w/ Flash RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時(shí)鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時(shí)器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT |
| TMS320F241FN | 制造商:Texas Instruments 功能描述:IC C2000 DSP SMD 320F241 PLCC68 |
| TMS320F241FNA | 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC 16B 5V fixed point DSP w/ Flash RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時(shí)鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時(shí)器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT |
| TMS320F241FNS | 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC 16B 5V fixed point DSP w/ Flash RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時(shí)鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時(shí)器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT |
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