ml22865 Oki Semiconductor, ml22865 Datasheet - Page 19

• Manufacturer Part Number: ml22865
• Description: Speech Synthesis Lsi With Built-in P2rom Including 2-channel Mixing Function
• Manufacturer: Oki Semiconductor

Memory Bank Switching Function
The memory bank switching function enables the the built-in ROM area that is divivided into up to four banks to
be used. When four banks are used, the maximum number of phrases per bank is 1,024 so that up to 4096
phrases can be played back.
Using this function, multiple ROM codes can be grouped into one code.
The settings of SEL1 pin and SEL0 pin determines which memory bank is used. To playback phrases, the
number of memory banks must be specified in PUP.
When using a memory bank switching function, data must be divided and saved in the specified areas at ROM
data creation.
− When the number of memory banks is 1
− When the number of memory banks is 2
− When the number of memory banks is 4
The memory (16 Mbits) in the ML22825 is divided as shown below.
SEL1
SEL1
SEL1
180000-1FFFFFh
100000-17FFFFh
0
0
0
0
0
1
1
80000-FFFFFh
0-7FFFFh
SEL0
SEL0
SEL0
0
0
1
0
1
0
1
Memory divide count: 1
16 Mbits × 1 area
100000h – 1FFFFFh
100000h – 17FFFFh
180000h – 1FFFFFh
00000h – 1FFFFFh
Bank 1
Capacity: 16 Mbits
Max. Phrase count: 1024
00000h – FFFFFh
00000h – 7FFFFh
80000h – FFFFFh
ML22825
ML22865
ML22825
ML22865
ML22825
ML22865
Memory divide count: 2
8 Mbits × 2 areas
Bank 1
Capacity: 8 Mbits
Max. Phrase count: 1024
Bank 2
Capacity: 8 Mbits
Max. Phrase count: 1024
C0000h – FFFFFh
80000h – BFFFFh
00000h – FFFFFh
00000h – 7FFFFh
80000h – FFFFFh
00000h – 3FFFFh
40000h – 7FFFFh
ML22824
ML22864
ML22824
ML22864
ML22824
ML22864
Memory divide count: 4
4 Mbits × 4 areas
Bank 1
Capacity: 4 Mbits
Max. Phrase count: 1024
Bank 2
Capacity: 4 Mbits
Max. Phrase count: 1024
Bank 3
Capacity: 4 Mbits
Max. Phrase count: 1024
Bank 4
Capacity: 4 Mbits
Max. Phrase count: 1024
ML2282X-XXX/ ML2286X -XXX
00000h – 3FFFFh
40000h – 7FFFFh
00000h – 1FFFFh
20000h – 3FFFFh
40000h – 5FFFFh
60000h – 7FFFFh
00000h -7FFFFh
ML22823
ML22863
ML22823
ML22863
ML22823
ML22863
FEDL228XXDIGEST-03
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