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參數(shù)資料
| 型號(hào)： | SM5L3 |
| 廠商： | SHARP ELECTRONICS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, MROM, MICROCONTROLLER, PQFP80 |
| 封裝： | 14 X 20 MM, PLASTIC, QFP-80 |
| 文件頁(yè)數(shù)： | 8/27頁(yè) |
| 文件大小： | 164K |
| 代理商： | SM5L3 |
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SM5L1/SM5L2/SM5L3
4-Bit Single Chip Microcomputers
16
Microcomputer Data Sheet
CONTROL PROCEDURE
The binary counter for designating the address of
the melody ROM can be arbitrarily set using the PRE
instruction. A performance is started and stopped by
the RD0 flag to ‘1’ and ‘0’.
The stop code generates a ‘rest tell signal’, and at
the same time, sets the RD1 flag.
Accordingly, to stop a performance at the end of
melody, the RD0 flag must be clear upon detection of
RD1 flag = 1.
Next step of PRE instruction, put the NOP instruction.
The following is an example of a melody generating
program.
MELO
LAX
2
ATX
LAX
1
PRE
;Set the starting address of the
melody at the 21st hexadecimal
step
NOP
;Dummy command
:
LBLX
0DH
LAX
1
OUT
;Start the melody
TPB
1
;Executed for clear the RD1 flag
NOP
;Dummy command
:
LBLX
0DH
L1
TPB
1
;Test the RD1 flag
TR
L1
;Loop for detect the stop code
LAX
0
OUT
;Stop the melody
Using these functions, the user can generate music,
sound effects, alarm signals, etc. as desired, and any
portion of the music can be repeated. Figure 21 lists the
melody output frequencies. The output frequency can
be halved by making bit 5 (OCT) of the melody ROM
LOW (‘0’). In Figure 21, m0 to m3 show data in bits 1 to
4 of the melody ROM.
Figure 21. Melody Output Frequencies
m3 m2 m1 m0
OUTPUT
FREQUENCY (Hz)
CLOCK
NUMBER
(NOTE 1)
(NOTE 2)
do
si
la#
la
sol#
sol
fa#
fa
mi
re#
re
do#
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
2114.1
1985.9
1872.4
1771.2
1680.4
1560.4
1489.5
1394.4
1310.7
1236.5
1170.3
1110.8
15.5
16.5
17.5
18.5
19.5
21.0
22.0
23.5
25.0
26.5
28.0
29.5
7
888
8
889
8
999
99
9
10
910
10
11
10
11
12
13
12
13
14
15
NOTES:
1. Number of clocks for one cycle.
2. The number (n) in the waveforms represents the number
of periods of the oscillation frequency (32.768 kHz) from
the crystal oscillator for the duration in that particular part
of the waveform.
5L1-21
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