MPC2F35 datasheet(6/46 Pages) MEGAWIN

6 / 46 page

MPC2F35_USB Data Sheet

MEGAWIN

Stack Pointer (S)

The stack pointer is an 8-bit register, which is used to control the addressing of the variable-length stack.

The stack pointer is automatically incremented and decremented under the control of the MCU to

perform the stack manipulations. The stack allows simple implementation of nested subroutines and

multiple level interrupts. The stack pointer is initialized by the user’s firmware.

Memory Map

There is a zero page working RAM (0000H ~ 007FH), a stack area (0180H ~ 01FFH) and two special

function register areas (SFR, 00C0H ~ 00FFH and 0200H ~ 027FH) in MPC2F35. The locations 0100H

to 017FH and the locations 0000H to 007FH share the same memory block, so MPC2F35 has a 256

bytes on-chip SRAM (zero page working RAM and stack area) and an 8k bytes on-chip flash ROM,

which are addressed from 8000H to 9FFFH. The address mapping of MPC2F35 is shown as below.

Zero Page

Working RAM

0000H

007FH

Memory Map

017FH

0100H

0080H~00BFH

00C0H~00FFH

0180H

01FFH

Stack Area

0200H

027FH

SFR

Program

9FFFH

A000H

7FFFH

8000H ~ 800FH

FFFFH

8010H

Interrupt Vector Area

RAM

MPC2F35 데이터시트(PDF) 6 Page - Megawin Technology Co., Ltd