Memory Area; Memory Map - Epson CMOS 32-Bit Single Chip Microcomputer S1C33L03 Technical Manual

II CORE BLOCK: BCU (Bus Control Unit)

Memory Area

Memory Map

Figure 4.1 shows the memory map supported by the BCU.
Area Address
Area 9
0x0BFFFFF
SRAM type
Burst ROM type
0x0800000
8 or 16 bits
Area 8
0x07FFFFF
SRAM type
DRAM type
8 or 16 bits 0x0600000
Area 7
0x05FFFFF
SRAM type
DRAM type
8 or 16 bits 0x0400000
Area 6
0x03FFFFF
SRAM type 0x0380000
0x037FFFF
0x0300000
Area 5
0x02FFFFF
SRAM type
8 or 16 bits
0x0200000
Area 4
0x01FFFFF
SRAM type
8 or 16 bits
0x0100000
Area 3
0x00FFFFF
16 bits
Fixed at 1 cycle
0x0080000
Area 2
0x007FFFF
16 bits
Fixed at 3 cycles
0x0060000
Area 1
0x005FFFF
8, 16 bits 0x0050000
2 or 4 cycles
0x004FFFF
0x0040000
0x003FFFF
0x0030000
Area 0
0x002FFFF
32 bits
Fixed at 1 cycle
0x0000000
Basically, Areas 0 to 3 are internal memory areas and Areas 4 to 18 are external memory areas.
Area 0 is normally used for a built-in RAM. The built-in memory is mapped from the beginning of the area.
Area 1 is reserved for the I/O memory of the on-chip functional blocks. Address 0x0040000 to address 0x004FFFF
are used as the control registers and address 0x0050000 to 0x005FFFF are used as the mirror area.
Area 2 is used in debug mode only and it cannot be accessed in user mode (normal program execution status).
Area 3 is reserved for S1C33 middlewares.
Area 4 to 18 can also be configured as internal memory areas using the control register and they can be used for
user logic circuits.
Note: Addresses 0x39FFC0–0x39FFCD in Area 6 are reserved as the internal memory area for the
control I/O memory of the SDRAM controller. Pay attention to this area since it must be accessed
when controlling the SDRAM self-refresh mode or other SDRAM functions.
B-II-4-4
External memory (4MB)
External memory (2MB)
External memory (2MB)
External I/O (16-bit device)
External I/O (8-bit device)
External memory (1MB)
External memory (1MB)
(Reserved)
For middleware use
(Reserved)
For CPU core or debug mode
(Mirror of internal I/O)
Internal I/O
(Mirror of internal I/O)
Internal RAM
Figure 4.1 Memory Map
EPSON
Area Address
Area 18
0xFFFFFFF
SRAM type 0xD000000
8 or 16 bits 0xCFFFFFF
0xC000000
Area 17
0xBFFFFFF
SRAM type 0x9000000
8 or 16 bits 0x8FFFFFF
0x8000000
Area 16
0x7FFFFFF
SRAM type 0x7000000
8 or 16 bits 0x6FFFFFF
0x6000000
Area 15
0x5FFFFFF
SRAM type 0x5000000
8 or 16 bits 0x4FFFFFF
0x4000000
Area 14
0x3FFFFFF
SRAM type
DRAM type
8 or 16 bits 0x3000000
Area 13
0x2FFFFFF
SRAM type
DRAM type
8 or 16 bits 0x2000000
Area 12
0x1FFFFFF
SRAM type
8 or 16 bits
0x1800000
Area 11
0x17FFFFF
SRAM type
8 or 16 bits
0x1000000
Area 10
0x0FFFFFF
SRAM type
Burst ROM type
8 or 16 bits 0x0C00000
External memory (16MB)
External memory (16MB)
External memory (16MB)
External memory (16MB)
External memory (16MB)
External memory (16MB)
External memory (8MB)
External memory (8MB)
External memory (4MB)
S1C33L03 FUNCTION PART