Table of Contents
Advertisement
11. Melody Driver (MELODY)
11.1
Overview
The ML63611 has an internal melody circuit and buzzer circuit.
While automatically reading melody data in ROM (program memory) as specified by an MSA instruction, the
melody circuit outputs a melody signal via the MD and MDB pins.
The output voltage level of the MDB pin when the melody is OFF can be selected as either V
mask option. Refer to Section 1.3, "Mask Options" and the "MOGTOOL Mask Option Generator User's Manual"
for details.
The melody circuit can select 29 different tones, 63 different tone lengths, and 15 different tempos.
The buzzer circuit has four different buzzer output modes at a frequency of 4 kHz. The buzzer driver signal is
output via the MD and MDB pins.
Melody output is a higher priority operation than buzzer output.
11.2
Melody Driver Configuration
The melody driver configuration is shown in Figure 11-1.
Melody end interrupt
request
MSA instruction
Data bus
OPTION A (C): 1.5 V (3.0 V), Without regulator
circuit for LCD bias
Melody data request
Melody circuit
Buzzer circuit
4
TEMPO
4
Figure 11-1 Melody Driver Configuration
11 – 1
ML63611 User's Manual
Chapter 11 Melody Driver (MELODY)
Melody data
14
4
MDCON
4
OPTION B (D): 1.5 V (3.0 V), With regulator
or V
using the
DD
SS
MD
MDB
circuit for LCD bias
Advertisement
Table of Contents
