7220 datasheet(91/303 Pages) RENESAS

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2-64

7220 Group User’s Manual

FUNCTIONAL DESCRIPTION

2.10 PWM

Fig. 2.10.2 8-bit PWM block diagram

2.10.1 8-bit PWM registers (addresses 00D016 to 00D416 and 00F616)

/DA registers (addresses 00CE16 and 00CF16)

Data transfer from the 8-bit PWM registers (addresses 00D016 to 00D416 and 00F616) to the 8-bit PWM

circuit is executed when writing data to the registers. The output signal from the 8-bit PWM output pin

corresponds to the contents of this register.

Also, data transfer from the DA registers (addresses 00CE16 and 00CF16) to the 14-bit PWM circuit is

executed when writing data to the DA-L register (address 00CF16). The output signal from the D–A output

pin corresponds to the contents of the DA latch.

Reading from the DA register (address 00CE16) means the DA latch contents. Therefore, it is possible to

confirm the data being output from the D-A output pin by reading the DA register.

The contents of the 8-bit PWM register and DA register are indeterminate after reset.

Inside of

with the others.

PWM1 register (Address : 00D116)

1/2

XIN

PWM timing

generating

circuit

PWM register

(Address : 00D0 16)

8-bit PWM circuit

PN3

P00

PW2

D00

PWM0

P01

PW3

D01

PWM1

P02

PW4

D02

PWM2

P03

PW5

D03

PWM3

P04

PW6

D04

PWM4

P05

PW7

D05

PWM5

PWM2 register (Address : 00D216)

PWM3 register (Address : 00D316)

PWM4 register (Address : 00D416)

PWM5 register (Address : 00F616)

Data bus

Selection gate :

PW: PWM output control register 1

PN: PWM output control register 2

PW0

Connected to

black side when

reset.

is as same contents

D0: Port P0 direction register

)

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