FEDL2280XFULL-04

ML22808/ML22804/Ml22802-XXX

Memory Bank Selecting Function

Using the memory bank selecting function, the internal ROM area in the ML22808/ML22804/ML22P808/

ML22P804 can be divided into up to four areas.

If four banks are used, up to 1024 phrases can be played

back since each bank is capable of up to 256 phrases.

Using the memory bank selecting function, the internal

ROM area in the MLl22802/ML22P802 can be divided into up to two areas.

If two banks are used, up to 512

phrases can be played back because each bank is capable of up to 256 phrases.

Using this function, it is

possible to put together multiple ROM codes into one code.

In the case of the ML22808/ML22804/ML22P808/ML22P804, the memory is used by setting the SEL1 and

SEL0 pins and in the case of the ML22802/ML22P802, the memory is used by setting the SEL pin, as shown in

the tables below.

In addition, when playing phrases, it is necessary to specify the number of memory banks by

PUP1 or PUP2.

“

⎯“ in the tables below means Don’t Care, whether 0 or 1.

Note that, if the memory bank selecting fnction is used, it is necessary to divide data when ROM data is created

and store the divided data in the specified area in advance.

For one memory banks:

SEL1

SEL0

ML22P808/ML22808-XXX

ML22P804/ML22804-XXX

SEL

ML22P802/ML22802-XXX

⎯

⎯

00000h -FFFFFh

00000h – 7FFFFh

⎯

00000h – 3FFFFh

For two memory banks:

SEL1

SEL0

ML22P808/ML22808-XXX

ML22P804/ML22804-XXX

SEL

ML22P802/ML22802-XXX

⎯

0

00000h – 7FFFFh

00000h – 3FFFFh

0

00000h – 1FFFFh

⎯

1

80000h – FFFFFh

40000h – 7FFFFh

1

20000h – 3FFFFh

For four memory banks:

SEL1

SEL0

ML22P808/ML22808-XXX

ML22P804/ML22804-XXX

0

0

00000h–3FFFFh

00000h–1FFFFh

0

1

40000h–7FFFFh

20000h–3FFFFh

1

0

80000h–BFFFFh

40000h–5FFFFh

1

1

C0000h–FFFFFh

60000h–7FFFFh

Shown below is an example of memory division for the M22808 (8 Mbits).

0–3FFFFh

40000–7FFFFh

80000–BFFFFh

C0000–FFFFFh

Bank 1

Capacity: 8 Mbits

Max. number of

phrases: 256

Bank 1

Capacity: 4 Mbits

Max. number of

phrases: 256

Bank 2

Capacity: 4 Mbits

Max. numbe

Bank 1

Capacity: 2 Mbits

Max. number of

phrases: 256

Bank 2

Capacity: 2 Mbits

Max. number of

phrases: 256

Bank 3

Capacity: 2 Mbits

Max. number of

r of

phrases: 256

phrases: 256

Bank 4

Capacity: 2 Mbits

Max. number of

phrases: 256

Number of memory

divisions: 1

8-Mbit

× 1 area

Number of memory

divisions: 2

4-Mbit

× 2 areas

Number of memory

divisions: 4

2-Mbit

× 4 areas

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