SNR008(2003) 查看數據表（PDF） - Sonix Technology Co., Ltd
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SNR008 Datasheet PDF : 9 Pages
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SNR008
8M-bit Mask ROM
4. Memory mapping for AD Bus Interface
For 8-bit AD (address/data) bus interface, all the address and data communication
between SNC710 and SNR008 are through data bus D[0..7]. SNC710 allows user to
connect maximum 2 external mask ROM, and SNR008 has 5 bank select pins
(BS0~BS4) to specify the memory region of each mask ROM.
BS4~BS0
00100
00101
00110
00111
01000
01001
01010
01011
01100
01101
01110
01111
10000
10001
Address Region
BS4~BS0
0x0200000 ~ 0x027FFFF
10010
0x0280000 ~ 0x02FFFFF
10011
0x0300000 ~ 0x037FFFF
10100
0x0380000 ~ 0x03FFFFF
10101
0x0400000 ~ 0x047FFFF
10110
0x0480000 ~ 0x04FFFFF
10111
0x0500000 ~ 0x057FFFF
11000
0x0580000 ~ 0x05FFFFF
11001
0x0600000 ~ 0x067FFFF
11010
0x0680000 ~ 0x06FFFFF
11011
0x0700000 ~ 0x077FFFF
11100
0x0780000 ~ 0x07FFFFF
11101
0x0800000 ~ 0x087FFFF
11110
0x0880000 ~ 0x08FFFFF
11111
Table-1
Address Region
0x0900000 ~ 0x097FFFF
0x0980000 ~ 0x09FFFFF
0x0A00000 ~ 0x0A7FFFF
0x0A80000 ~ 0x0AFFFFF
0x0B00000 ~ 0x0B7FFFF
0x0B80000 ~ 0x0BFFFFF
0x0C00000 ~ 0x0C7FFFF
0x0C80000 ~ 0x0CFFFFF
0x0D00000 ~ 0x0D7FFFF
0x0D80000 ~ 0x0DFFFFF
0x0E00000 ~ 0x0E7FFFF
0x0E80000 ~ 0x0EFFFFF
0x0F00000 ~ 0x0F7FFFF
0x0F80000 ~ 0x0FFFFFF
Note: For the address region 0x00000~0x01FFFFF are reserved, and the setting
of bank select pins BS4~BS0 CAN’T be the range 0000~0x0011.
Ver. 1.3
4
August 29, 2003
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