Multi-Tone Generator - Hitachi H8/300L Series Manual

Peripheral Functions

10. Multi-Tone Generator

The H8/3877 Series on-chip multi-tone generator can output arbitrary waveforms at arbitrary
frequencies.
Features: • Generates a wide range of frequencies, from 40 Hz to 4000 Hz (when
OSC = 10 MHz).
Frequency Range
40 Hz to 1000 Hz
1000 Hz to 3000 Hz
3000 Hz to 4000 Hz
The output frequency is generated by using a frame counter and a fine tuning
counter to divide the oscillator clock (f
• The output waveform is generated by a 5-bit resolution R-2R type D/A
converter at up to 128 divisions per cycle. This allows a stable low-distortion
waveform to be acquired.
• An arbitrary waveform pattern can be formed by storing a bit pattern in MTG
RAM (up to 128 bits).
Step Size Precision
1 Hz ±0.05 Hz
1 Hz ±0.5 Hz
2 Hz ±1 Hz
).
OSC
114