h8s-2111b Renesas Electronics Corporation., h8s-2111b Datasheet - Page 189

• Manufacturer Part Number: h8s-2111b
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

8.4.1
8.4.2
Figure 8.4 shows the diagram example when using the PWM pulse as the D/A converter. Analog
signal with low ripple can be generated by connecting the low pass filter.
setting example
PWDR
H'7F
H'80
H'81
H'82
PWM Setting Example
Diagram of PWM Used as D/A Converter
: Pulse added
Combination of the basic pulse and added pulse outputs 0/256 to 255/256 of dudty cycle as low ripple wave form.
0
1
Figure 8.4 Example when PWM is Used as D/A Converter
2
3
This LSI
4
Figure 8.3 Example of PWM Setting
5
1-conversion cycle
6
7
Resistor : 120 kΩ
8
9
Low pass filter
10
11
12
Capacitor : 0.1 µF
13
14
Reference value
Rev. 1.00, 05/04, page 155 of 544
15
Duty cycle
127/256
128/256
129/256
130/256
112 pulses
128 pulses
128 pulses
128 pulses
waveform
Basic
15 pulses
Additiona
0 pulses
2 pulses
1 pulse
pulse