MB90P663APFM View Datasheet(PDF) - Fujitsu

Part Name

Description

Manufacturer

MB90P663APFM

16-bit Proprietary Microcontroller

Fujitsu 

MB90660A Series

5. PWM Timer

This block, which is an 8-bit reload timer module, outputs the pulse width modulation (PWM) using pulse output

control corresponding to the timer operation.

In terms of hardware, this block possesses an 8-bit down counter, two 8-bit reload registers for setting “L” width

and “H” width, a control register, external pulse output pin, and interrupt output circuit to achieve the following

functions.

• PWM output operation

: Pulse waves of any period and duty factor are output.

This block can also be used as a D/A converter with an external circuit.

Interrupt requests can be output based on counter underflow.

(1) Register Configuration

PWM operation mode

control register

Address: 000020H

PWM reload register

000022H

000023H

8 bits

(Functions)

PWMC (R/W) Operation mode control

PRLL (R/W) Hold “L” pulse width reload value

PRLH (R/W) Hold “H” pulse width reload value

(2) Block Diagram

PWM

Output enabled

(Port)

TBT output main clock divided by 4

TBT output main clock divided by 512

PWMO

Output latch

Reverse Clear

TBT: Timebase timer

PEN

PCNT

(down counter)

IRQ

Count clock

selection

Reload

L/H select

L/H selector

PRLL

PRLH

PRLBH

PWMC

Operation mode

control

F2MC-16 bus

37

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