38B7 datasheet(63/110 Pages) RENESAS

63 / 110 page

38B7 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS

1/2

XIN

(4MHz)

P96/PWM0

bit7

bit0

bit5

MSB

LSB

PWM

bit7

bit0

Data bus

XCIN

“1”

“0”

PWM register (high-order)

(address 003516)

PWM register (low-order)

(address 003616)

It is set to “1”

when write.

PWM latch (14-bit)

14-bit PWM circuit

When the internal

system clock

selection bit is set

to “0”

Timing

generating

unit for PWM

(64

µs cycle)

(4096

µs cycle)

P96/PWM output

selection bit

P96 direction

P96/PWM output

selection bit

P96 latch

PWM (Pulse Width Modulation)

The 38B7 group has a PWM function with a 14-bit resolution. When

the oscillation frequency XIN is 4 MHz, the minimum resolution bit

width is 250 ns and the cycle period is 4096

µs. The PWM timing

generator supplies a PWM control signal based on a signal that is

the frequency of the XIN clock.

The explanation in the rest assumes XIN = 4 MHz.

Fig. 64 PWM block diagram

38B7 Datasheet(PDF) 63 Page - Renesas Technology Corp

38B7 Datasheet(HTML) 63 Page - Renesas Technology Corp

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