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Recording Total On-Time and Po
消耗积分:3 |
格式:rar |
大小:234 |
2009-04-17
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OVERVIEW
The DS1682 provides a method of counting power cycles, total on-time, and alarm-on match functions
that reduce the amount of processor overhead. Total on-time information is useful in applications from
Hobbs meters to equipment warranty, repair, and maintenance.
The DS1682 contains a 32-bit elapsed time counter (ETC), a 17-bit event counter, and a 32- bitalarm register. In addition, the DS1682 has 10-bytes of user-programmable memory. The counter increments i º seconds. The ETC and event counter data are stored in EEPROM at the end of each event.
In this example, the EVENT input is driven by a DS1233-15 EconoReset. A Shottky diode and capacito provide the energy necessary to allow the DS1682 to store the data to the internal EEPROM when VCC goes away. An 8051-type processor is used to read the registers and transmit the information to a displayvia a serial port. An LED is included in case the alarm function is required. A schematic of the circuit is shown in Figure 1. Software for initializing the DS1682 and reading the registers is show in Figure 2.
The DS1682 provides a method of counting power cycles, total on-time, and alarm-on match functions
that reduce the amount of processor overhead. Total on-time information is useful in applications from
Hobbs meters to equipment warranty, repair, and maintenance.
The DS1682 contains a 32-bit elapsed time counter (ETC), a 17-bit event counter, and a 32- bitalarm register. In addition, the DS1682 has 10-bytes of user-programmable memory. The counter increments i º seconds. The ETC and event counter data are stored in EEPROM at the end of each event.
In this example, the EVENT input is driven by a DS1233-15 EconoReset. A Shottky diode and capacito provide the energy necessary to allow the DS1682 to store the data to the internal EEPROM when VCC goes away. An 8051-type processor is used to read the registers and transmit the information to a displayvia a serial port. An LED is included in case the alarm function is required. A schematic of the circuit is shown in Figure 1. Software for initializing the DS1682 and reading the registers is show in Figure 2.
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