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4.11.3.

Basic timer (TMR4)

The basic timer functions are as follows:

Table 13 Basic timer

Timer type

Basic timer

Timer

TMR4

Counting resolution

8 bits

Counter type

Prescaler coefficient

Exponential power of any 2 from 1 to 128

Capture/ Comparison

Channels

Complementary output

Function description

‒

Used to connect with external signals or cascade timers.

‒

Interrupt generation. [When the counter is updated (the

counter overflows) and when the trigger signal is input]

4.11.4.

Watchdog (WDT)

Two watchdogs (independent watchdog and window watchdog) are embedded

in the product, which can be used to detect and solve faults caused by software

errors, thus improving the system security. The following table shows the

comparative data of two watchdogs.

Table 14 Watchdog (WDT)

Name

Counter

Resolver

Counter

type

Prescaler coefficient

Function description

Independent

watchdog

(IWDT)

8 bits

down

Between 4 and 256

Any exponential

power of 2

‒

It is driven by an internal

independent 128kHz LIRC RC

oscillator as a clock source, so

it still works as usual even if

the master clock fails.

‒

The whole system can be

reset in case of problems.

‒

It can provide timeout

management for applications.

‒

It can be configured as a

software or hardware startup

watchdog.

Window

watchdog

（

WWDT）

7 bits

down

‒

Used to detect software faults,

when it happens is generated

by external interference or

unexpected logic conditions,

which causes the application

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