MEC1322 datasheet(224/456 Pages) MICROCHIP

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MEC1322

DS00001719D-page 224

 2014 - 2015 Microchip Technology Inc.

17.8

Description

This timer block offers a simple mechanism for firmware to maintain a time base in the design. The timer may be enabled

to execute the following features:

• Programmable resolution per LSB of the counter via the Pre-scale bits in the Timer Control Register

• Programmable as either an up or down counter

• One-shot or Continuous Modes

• In one-shot mode the Auto Restart feature stops the counter when it reaches its limit and generates a level event.

• In Continuous Mode the Auto Restart feature restarts that counter from the programmed preload value and gener-

ates a pulse event.

• Counter may be reloaded, halted, or started via the Timer Control register

• Block may be reset by either a Power On Reset (POR) or via a Soft Reset.

17.9

EC-Only Registers

The registers listed in the EC-Only Register Summary table are for a single instance of the Basic Timer. The addresses

of each register listed in this table are defined as a relative offset to the host “Base Address” defined in the EC-Only

FIGURE 17-2:

BLOCK DIAGRAM

TABLE 17-5:

EC-ONLY REGISTER BASE ADDRESS TABLE

Block Instance

Instance

Number

Host

Address Space

Base Address

TIMER16 (16-bit

Timer)

32-bit internal

address space

4000_0C00h

TIMER16 (16-bit

Timer)

32-bit internal

address space

4000_0C20h

TIMER16 (16-bit

Timer)

32-bit internal

address space

4000_0C40h

TIMER16 (16-bit

Timer)

32-bit internal

address space

4000_0C60h

TIMER32 (32-bit

Timer)

32-bit internal

address space

4000_0C80h

TIMER32 (32-bit

Timer)

32-bit internal

address space

4000_0CA0h

Host Interface

Basic Timer

REGS

Timer Logic

Pre-Scaler

48 MHz

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