PD17012_15 Datasheet, PDF (164/320 Pages) Renesas Technology Corp – 4-BIT SINGLE-CHIP MICROCONTROLLERS WITH DIGITAL TUNING SYSTEM HARDWARE

µPD17012, 17P012
14.4.4 Configuration and function of each PWM data register
The function of each PWM data register is illustrated below.
The PWM data register sets the duty factor of a D/A converter (PWM output) output signal.
Name
Data buffer
Symbol
DBF3
DBF2
DBF1
DBF0
Address
0CH
0DH
0EH
0FH
Bit
b3 b2 b1 b0 b3 b2 b1 b0 b3 b2 b1 b0 b3 b2 b1 b0
Data
Don't care
Don't care
Transfer data
Name
PWM0 data register
PWM1 data register
GET can be executed
8
PUT can be executed
Peripheral register
b7
b6
b5
b4
b3
b2
b1
b0 Symbol
Peripheral
address
Valid data
PWMR0 04H
Peripheral
hardware
PWM0 pin
PWMR1 05H
PWM1 pin
Sets PWM output duty of each pin
0
x + 0.25
Duty: D =
× 100%
256
1.125 MHz
Frequency: f =
256
x
= 4.3945 kHz
255
162
Data Sheet U10101EJ4V0DS