FEDL 2213-01

1Semiconductor

ML2213

20/26

(3) End-Bit

The end-bit is set at the first byte, the MSB, of music phrase data. As soon as the LSI starts to output the last note

code where the end-bit is set to “1”, the Music Generator circuit issues an end-music interrupt call and stops

playback after the last note code has been output.

7.3 Sample Musical Note Codes

Table 7.6 shows sample codes to output a part of musical score shown in Figure 7.3.

Figure 7.3

Table 7.6 Coding Sample

Note Code

1st Byte

2nd Byte

7

6

5

4

3

2

1

0

7

654321

0

Musical

Note

END

—*

L5L4

L3L2

L1L0

N7

N6

N5

N4

N3

N2

N1

N0

Hexa-

decimal

G

2

0

0

1

0

1

1

1

1

0

101000

0

2F50H

D

2

0

0

0

0

1

1

1

1

0

110101

1

0F6BH

G

2

0

0

0

1

0

1

1

1

0

101000

0

1750H

D

2

0

0

0

0

0

1

1

1

0

110101

1

076BH

G

2

0

0

0

1

0

1

1

1

0

101000

0

1750H

A

2

0

0

0

0

0

1

1

1

0

100011

1

0747H

B

2

0

0

1

1

1

1

1

1

0

011111

1

3F3FH

G

2

1

0

1

1

1

1

1

1

0

101000

0

BF50H

Note: * Bit 6 of the first byte can be either “0” or “1” (Don’t care bit), so is set to “0” in the above sample

codes.

=120