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Tailored I/O functions realized as IP cores for configuration in onboard FPGAs The 16Z049_TMR is a 8254-compatible counter IP core included into a timer counter unit, which includes clock input switching, interrupt logic and a programmable time base.

16Z049_TMR - 8254-Compatible Counter IP Core

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Diagram
16Z049_TMR Diagram

Larger picture of 16Z049_TMR Diagram

Main Features
  • FPGA IP Core
  • 8254-compatible timer/counter
  • Up to 9 counters
  • Wishbone bus interface
Description Open

This counter is compatible with the 82C54 programmable Interval Timer Chip. It is recommended to read the datasheet of the 82C54 in order to fully understand the requirements and to see all the programming examples. The IP core is included into a timer counter unit, which includes clock input switching, interrupt logic and a programmable time base. The timer/counter unit provides three 8254 chips, so 9 counters can be used. Every individual part of the timer/counter unit has a Wishbone interface, so it can be used as a stand-alone module.

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Technical Data

Size

Logic elements typ.: 3300 typ.

Pin count min: 3

Pin count max: 9

System-Bus Interface

Wishbone bus interface compliant with Wishbone Specification B.3

32-bit data transfer, 33MHz bus frequency

Supported Wishbone bus cycles
• Single read/write
• Block read/write

Timer/Counter Functionality

Up to 9 counters

8254-compatible

Clock input switching

Interrupt logic

Programmable time base

Documentation
Article No. Description More
16Z049-DS16Z049_TMR Data Sheet (PDF) Download
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