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SM5M2 데이터시트(PDF) 17 Page - Sharp Corporation

부품명 SM5M2
상세설명  4-Bit Single-Chip Microcomputer(LCD Driver)
PDF  28 Pages
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제조업체  SHARP [Sharp Corporation]
홈페이지  http://sharp-world.com/
Logo SHARP - Sharp Corporation

SM5M2 데이터시트(HTML) 17 Page - Sharp Corporation

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SM5M2
- 17 -
MELODY ROM INSTRUCTION
The melody ROM instruction is composed of 6-bit.
This 6-bit instruction (1 set), corresponding to a
musical note, generates a sound signal.
l
: Control the tone length. When “1”,
125 ms; when “0”, 62.5 ms.
OCT
: When the octave is “1”, the frequency
is determined by m3 -m0.
When the octave is “0”, 1/2 of the
frequency determined by m3-m0.
m3 - m0
: Frequency as shown in Table 3.
Pause when m3 = m2 = m1 = m0 = 0,
stop instruction when m3 = m2 = m1
= 0, m0 = 1.
l
OCT
m3
m2
m1
m0
MUSICAL SCALE TONE LENGTH (ms) OCT
m3
m2
m1
m0
sol
375
00111
la
125
sol
250
mi
250
do
375
re
125
do
250
la
250
00101
00111
01010
10010
11100
10010
00101
ADDRESS
DATA
MUSICAL NOTE INSTRUCTION
00
00
pause
01
27
02
27
03
27
04
25
05
27
06
27
07
2A
sol
sol
sol
la
sol
sol
mi
08
09
0A
0B
0C
0D
0E
0F
10
11
2A
22
22
22
3C
22
22
25
25
01
mi
do
do
do
re
do
do
la
la
stop
The tone length of an initial musical note which is
generated from ROM addressed data assigned by
a PRE instruction has an error of maximum ±4 ms.
Therefore, by applying a pause as an initial note, a
melody performs with a precisely regulated tone
length.
EXAMPLE OF WRITING ON THE MELODY ROM
An example of writing a tone such as the following,
on the melody ROM will be shown.



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