Hitachi SH7709S Hardware Manual page 260

Superh risc engine
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Bits 10 and 9—Area 0 Burst ROM Control (A0BST1, A0BST0): Specify whether to use burst
ROM in physical space area 0. When burst ROM is used, these bits set the number of burst
transfers.
Bit 10: A0BST1
Bit 9: A0BST0
0
0
1
1
0
1
Bits 8 and 7—Area 5 Burst Enable (A5BST1, A5BST0): Specify whether to use burst ROM
and PCMCIA burst mode in physical space area 5. When burst ROM and PCMCIA burst mode
are used, these bits set the number of burst transfers.
Bit 8: A5BST1
Bit 7: A5BST0
0
0
1
1
0
1
Bits 6 and 5—Area 6 Burst Enable (A6BST1, A6BST0): Specify whether to use burst ROM
and PCMCIA burst mode in physical space area 6. When burst ROM and PCMCIA burst mode
are used, these bits set the number of burst transfers.
Description
Access area 0 accessed as ordinary memory
Access area 0 accessed as burst ROM (4 consecutive
accesses). Can be used when bus width is 8, 16, or 32.
Access area 0 accessed as burst ROM (8 consecutive
accesses). Can be used when bus width is 8 or 16.
Should not be specified when bus width is 16 or 32.
Access area 0 accessed as burst ROM (16 consecutive
accesses). Can be used only when bus width is 8.
Should not be specified when bus width is 16 or 32.
Description
Access area 5 accessed as ordinary memory
Burst access of area 5 (4 consecutive accesses). Can
be used when bus width is 8, 16, or 32.
Burst access of area 5 (8 consecutive accesses). Can
be used when bus width is 8 or 16. Should not be
specified when bus width is 32.
Burst access of area 5 (16 consecutive accesses). Can
be used only when bus width is 8. Should not be
specified when bus width is 16 or 32.
(Initial value)
(Initial value)
241

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