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FM8P54/56
Rev1.21 May 31, 2005
P.4/FM8P54/56
FEELING
TECHNOLOGY
1.0 MEMORY ORGANIZATION
FM8P54/56 memory is organized into program memory and data memory.
1.1 Program Memory Organization
The FM8P54/54E have a 9-bit Program Counter (PC) capable of addressing a 512×13 program memory space.
The FM8P56/56E have a 10-bit Program Counter capable of addressing a 1K×13 program memory space.
The RESET vector for the FM8P54/54E is at 1FFh. The RESET vector for the FM8P56/56E is at 3FFh.
The H/W interrupt vector is at 008h. And the S/W interrupt vector is at 002h.
FM8P54/56 supports all ROM/EPROM area CALL/GOTO instructions without page.
FIGURE 1.1: Program Memory Map and STACK
PC<9:0>
Stack 1
Stack 2
PC<8:0>
Stack 3
Stack 4
Stack 5
Stack 1
Stack 2
3FFh
Reset Vector
Stack 3
Stack 4
Stack 5
1FFh
Reset Vector
:
:
:
:
008h H/W Interrupt Vector
008h H/W Interrupt Vector
002h S/W Interrupt Vector
002h S/W Interrupt Vector
000h
000h
FM8P54/54E
FM8P56/56E