Renesas SH7709S Stereo System User Manual


 
Rev. 5.00, 09/03, page 238 of 760
Bit 6: A6BST1 Bit 5: A6BST0 Description
0 0 Access area 6 accessed as ordinary memory
(initial value)
1 Burst access of area 6 (4 consecutive accesses). Can
be used when bus width is 8, 16, or 32.
1 0 Burst access of area 6 (8 consecutive accesses). Can
be used when bus width is 8 or 16. Should not be
specified when bus width is 32.
1 Burst access of area 6 (16 consecutive accesses). Can
be used only when bus width is 8. Should not be
specified when bus width is 16 or 32.
Bits 4 to 2—Area 2, Area 3 Memory Type (DRAMTP2, DRAMTP1, DRAMTP0): Designate
the types of memory connected to physical space areas 2 and 3. Ordinary memory, such as ROM,
SRAM, or flash ROM, can be directly connected. Synchronous DRAM can also be directly
connected.
Bit 4: DRAMTP2 Bit 3: DRAMTP1 Bit 2: DRAMTP0 Description
000Areas 2 and 3 are ordinary memory
(Initial value)
1 Reserved (Setting prohibited)
1 0 Area 2: ordinary memory; area 3:
synchronous DRAM
*
2
1 Areas 2 and 3 are synchronous DRAM
*
1
*
2
100Reserved (Setting prohibited)
1 Reserved (Setting prohibited)
1 0 Reserved (Setting prohibited)
1 Reserved (Setting prohibited)
Notes: 1. When selecting this mode, set the same bus width for area 2 and area 3.
2. Do not access synchronous DRAM when clock ratio Iφ:Bφ = 1:1
Bit 1—Area 5 Bus Type (A5PCM): Designates whether to access physical space area 5 as
PCMCIA space.
Bit 1: A5PCM Description
0 Physical space area 5 accessed as ordinary memory (Initial value)
1 Physical space area 5 accessed as PCMCIA space