Rom; Ram - Epson E0C6001 Technical Manual

E0C6001 TECHNICAL HARDWARE
Fig. 3.2.1
ROM configuration
I-12

3.2 ROM

The built-in ROM, a mask ROM for the program, has a
capacity of 1,024 × 12-bit steps. The program area is 4
pages (0–3), each consisting of 256 steps (00H–FFH). After
an initial reset, the program start address is page 1, step
00H. The interrupt vector is allocated to page l, steps 01H–
07H.
Bank 0
0 page
1 page
2 page
3 page

RAM

3.3
The RAM, a data memory for storing a variety of data, has a
capacity of 80 words, 4-bit words. When programming,
keep the following points in mind:
(1) Part of the data memory is used as stack area when
saving subroutine return addresses and registers, so be
careful not to overlap the data area and stack area.
(2) Subroutine calls and interrupts take up three words on
the stack.
(3) Data memory 000H–00FH is the memory area pointed by
the register pointer (RP).
Program start address
00H step
01H step
Interrupt vector area
07H step
08H step
Program area
FFH step
12 bits