产品标题:3BHB003154R0101 GVC707AE01 3BHB003149P201驱动控制单元配置
型号:3BHB003154R0101 GVC707AE01 3BHB003149P201
质保:七天验收期,质保期一年
品牌:ABB
产品图片展示
产品详情资料:
VMIVME-7740提供用户可编程82C54内部定时器/计数器。82C54提供三个独立的16位定时器,每个定时器以跳线E8配置确定的1或2 MHz时钟速度运行;请参阅第32页的表2-2。这些定时器完全可供用户使用,并不专用于任何PC/AT功能。这些定时器可用于生成系统中断。事件可以通过轮询定时器或通过82C54外部电路生成系统中断来计时。外部电路包括生成中断的逻辑和指示三个定时器中哪个定时器生成了中断的定时器中断状态寄存器。82C54定时器映射到I/O地址$500。定时器使用的中断是IRQ5。定时器中断状态寄存器可通过电源管理I/O地址空间使用。在下面的“定时器中断状态”部分中解释了对该空间的访问。
产品英文详情资料:
The VMIVME-7740 provides a user-programmable 82C54 internal timer/counter. The 82C54 provides three independent, 16-bit timers, each operating at 1 or 2 MHz clock speed determined by the configuration of jumper E8; reference Table 2-2 on page 32. These timers are completely available to the user and are not dedicated to any PC/AT function. These timers may be used to generate system interrupts. Events can be timed by either polling the timers or generating a system interrupt via circuity external to the 82C54. The external circuity consists of logic which generates the interrupt and a Timer Interrupt Status register which indicates which of the three Timers generated an interrupt. The 82C54 timers are mapped at I/O address $500. The interrupt used by the Timers is IRQ5. The Timer Interrupt Status register is available via the Power Management I/O address space. The access to this space is explained in the “Timer Interrupt Status” section below.