Internal postage meter machine interface circuit
US5710721A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1995 |
| Grant date | Jan 20, 1998 |
| Priority date | — |
| Expiry date | Dec 6, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07B2017/00532
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An internal postage meter machine interface circuit is equipped with transmission and reception registers for storing data transmitted parallel and with a shift register for serial-to-parallel or parallel-to-serial conversion of transmitted data within an actuator/sensor control. Data are communicated serially between the meter and a register unit in the base. Sensors and actuators of the base are connected to the register unit. Sensor signals are shifted into the shift register of the actuator/sensor controller and are present therein so as to be fetchable in parallel. A sensor status register group for parallel data of the sensor signals of at least one sensor is provided as a reception register. At least one sensor status register and at least one interrupt control register are connected to a watchdog circuit in order to monitor the received bits of the sensor signals for status change in order to trigger an interrupt to the control unit, as warranted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.