II CORE BLOCK: BCU (Bus Control Unit)
Area 10
Area 10 is an external memory area that includes the boot address (0xC00000). This area supports two boot modes.
Note: Internal ROM is not provided in the S1C33L03.
Area 10 boot mode
The boot mode can be configured using the external pins EA10MD[1:0].
Table 4.6 Area 10 Boot Mode Selection
EA10MD[1:0] pins | Area 10 boot mode |
10Internal ROM boot mode
11External ROM boot mode
Internal ROM boot mode
The CPU boots by the internal ROM mapped to area 10. The internal ROM size should be selected from among eight types (min. 16 KB, max. 2 MB) using the A10IR[2:0] (D[E:C])/Areas
External ROM boot mode
The CPU boots by the external ROM (ROM, Flash, SRAM, etc.). This mode uses the bus condition set by the BCU registers for area 10.
Setting the internal ROM size
When a boot mode other than external ROM boot mode is used, the internal ROM or emulation memory size should be set using A10IR[2:0] (D[E:C)/Areas
Table 4.7 Area 10 Internal ROM Size
A10IR2 | A10IR1 | A10IR0 | ROM size |
0 | 0 | 0 | 16 KB |
0 | 0 | 1 | 32 KB |
0 | 1 | 0 | 64 KB |
0 | 1 | 1 | 128 KB |
1 | 0 | 0 | 256 KB |
1 | 0 | 1 | 512 KB |
1 | 1 | 0 | 1 MB |
1 | 1 | 1 | 2 MB (default) |
EPSON | S1C33L03 FUNCTION PART |