10F200 datasheet(18/96 Pages) MICROCHIP

18 / 96 page

PIC10F200/202/204/206

DS41239D-page 16

4.2

Program Memory Organization for

the PIC10F202/206

The PIC10F202/206 devices have a 10-bit Program

Counter (PC) capable of addressing a 1024 x 12

program memory space.

Only the first 512 x 12 (0000h-01FFh) for the

PIC10F202/206 are physically implemented (see

Figure 4-2). Accessing a location above these

boundaries will cause a wraparound within the first

512 x 12 space (PIC10F202/206). The effective

Reset vector is at 0000h (see Figure 4-2). Location

01FFh (PIC10F202/206) contains the internal clock

oscillator calibration value. This value should never

be overwritten.

FIGURE 4-2:

PROGRAM MEMORY MAP

AND STACK FOR THE

PIC10F202/206

4.3

Data Memory Organization

Data memory is composed of registers or bytes of

RAM. Therefore, data memory for a device is specified

by its register file. The register file is divided into two

functional groups: Special Function Registers (SFR)

and General Purpose Registers (GPR).

The Special Function Registers include the TMR0 reg-

ister, the Program Counter (PCL), the STATUS register,

the I/O register (GPIO) and the File Select Register

(FSR). In addition, Special Function Registers are used

to control the I/O port configuration and prescaler

options.

The General Purpose registers are used for data and

control information under command of the instructions.

For the PIC10F200/204, the register file is composed of

7 Special Function registers and 16 General Purpose

registers (see Figure 4-3 and Figure 4-4).

For the PIC10F202/206, the register file is composed of

8 Special Function registers and 24 General Purpose

registers (see Figure 4-4).

4.3.1

GENERAL PURPOSE REGISTER

FILE

The General Purpose Register file is accessed, either

directly or indirectly, through the File Select Register

(FSR). See Section 4.9 “Indirect Data Addressing:

INDF and FSR Registers”.

CALL, RETLW

PC<8:0>

Stack Level 1

Stack Level 2

0000h

02FFh

Reset Vector(1)

Note 1:

Address 0000h becomes the

effective Reset vector. Location

01FFh contains the MOVLW XX

internal oscillator calibration value.

512 Words

01FFh

0200h

On-chip Program

Memory

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