Dual Timer / Counter with Prescaler

Overview

Timer and counters are essential in CPU applications. Used to count events, measure time intervals or frequencies, or generate periodic timing events.
The TIMERmodule provides two independent 16-bit timers each with its own 16-bit pre-scaler. An additional pre-scaler is provided for applications where external high frequency events or clocks control the operation. The two timers can be locked for measurements over a given time span. Timer B provides the observation window while Timer A is counting events.
The operating mode of each timer can be selected independently:
- Free running: Timer is reloaded with initial value after counter reaches zero
- One-shot: Timer stops after reaching terminal count
- Window mode: Timer A counts while Timer B generates observation window
Each timer generates an interrupt upon arriving at terminal count zero. A count capture command is available to sample the current count state without interrupting the timer.

Key Features

Clock prescaler for external high frequency sources
Internal or external clock source select
Supports single-shot, free running and counter mode
Provides two 16-bit counter /timers with individual 16-bit prescalers
Two interrupt sources, one for each counter/timer
Individual counter capture commands
Supports synchronous bus interfaces such as AMBA APB version 2.0
Gate-count optimization
Configurable CPU readback path

Benefits

For gate-count optimization, the core can be configured to disable the configuration register read-back path. Synthesis options are included to use the core in 8, 16 and 32-bit systems. With a separate APB wrapper, the core can be used in ARM subsystems.

Block Diagram

Applications

Industrial control
CPU subsystems
System-on-Chip design
Watchdog or timing reference

Deliverables

VHDL or Verilog RTL Source Code
Functional Testbench
Synthesys Script
Data Sheet
User Guide
Hotline Support by means of phone, fax and e-mail

Technical Specifications

Foundry, Node

Technology independent

Maturity

Proven in ASIC and FPGA Technologies

Availability

now

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