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参数资料
| 型号： | TMS320F241PGS |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 数字信号处理 |
| 英文描述： | 0-BIT, 5 MHz, OTHER DSP, PQFP64 |
| 封装： | PLASTIC, QFP-64 |
| 文件页数： | 51/122页 |
| 文件大小： | 1465K |
| 代理商： | TMS320F241PGS |
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TMS320F243, TMS320F241
DSP CONTROLLERS
SPRS064D DECEMBER 1997 REVISED FEBRUARY 2006
34
POST OFFICE BOX 1443
HOUSTON, TEXAS 772511443
interrupt vectors (continued)
The peripheral interrupt vectors (PIVs) are stored in a table in the peripheral interrupt expansion controller. They
can either be hard-coded (potentially ROM), or register locations (RAM), which are programmed by the reset
service routine. The PIVs are all implemented as hard-coded values on the F243/F241 devices, according to
Table 10, column 5.
phantom interrupt vector
The phantom interrupt vector is an interrupt system integrity feature. If the CPU’s interrupt acknowledge is
asserted, but there is no associated peripheral interrupt request asserted, the phantom vector is used so that
this fault is handled in a controlled manner. One way the phantom interrupt vector could be required is if the CPU
executes a software interrupt instruction with an argument corresponding to a peripheral interrupt (usually
INT1INT6). The other way would be if a peripheral made an interrupt request, but its interrupt request flag was
cleared by software before the CPU acknowledged the request. In this case, there may be no peripheral
interrupt request asserted to the interrupt controller, so the controller would not know which peripheral interrupt
vector to load into the PIVR. In these situations, the phantom interrupt vector is loaded into the PIVR in lieu of
a peripheral interrupt vector.
software hierarchy
There are two levels of interrupt service routine hierarchy: the General Interrupt Service Routine (GISR), and
the Event-Specific Interrupt Service Routine (SISR). There is one GISR for each maskable prioritized request
(INT) to the CPU. This can perform necessary context saves before it fetches the PIV from the PIVR. This PIV
value is used to generate a branch to the SISR. There is one SISR for every interrupt request from a peripheral
to the interrupt controller. The SISR performs the actions required in response to the peripheral interrupt
request.
nonmaskable interrupts
The PIE controller does not support expansion of nonmaskable interrupts. This is because an ISR must read
the peripheral interrupt vector from the PIVR before interrupts are re-enabled. All interrupts are automatically
disabled when any of the INT1 INT6 interrupts are serviced. If the PIVR is not read before interrupts are
re-enabled, another interrupt would be acknowledged and a new peripheral interrupt vector would be loaded
into the PIVR, causing permanent loss of the original peripheral interrupt vector. Since, by their very nature,
nonmaskable interrupts cannot be masked, they cannot be included in the interrupt expansion controller
because they could cause the loss of peripheral interrupt vectors.
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| TMS320F28015PZA | 功能描述:数字信号处理器和控制器 - DSP, DSC 32-Bit DSC w/ 32KB Flash RoHS:否 制造商:Microchip Technology 核心:dsPIC 数据总线宽度:16 bit 程序存储器大小:16 KB 数据 RAM 大小:2 KB 最大时钟频率:40 MHz 可编程输入/输出端数量:35 定时器数量:3 设备每秒兆指令数:50 MIPs 工作电源电压:3.3 V 最大工作温度:+ 85 C 封装 / 箱体:TQFP-44 安装风格:SMD/SMT |
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| TMS320F28015PZQ | 功能描述:数字信号处理器和控制器 - DSP, DSC 32-Bit DSC w/ 32KB Flash RoHS:否 制造商:Microchip Technology 核心:dsPIC 数据总线宽度:16 bit 程序存储器大小:16 KB 数据 RAM 大小:2 KB 最大时钟频率:40 MHz 可编程输入/输出端数量:35 定时器数量:3 设备每秒兆指令数:50 MIPs 工作电源电压:3.3 V 最大工作温度:+ 85 C 封装 / 箱体:TQFP-44 安装风格:SMD/SMT |
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