PIC10F200/202/204/206
4.2
Program Memory Organization 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).
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
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
PC<8:0>
10
Stack Level 1
Stack Level 2
CALL, RETLW
4.3.1
GENERAL PURPOSE REGISTER
FILE
Reset Vector
(1)
On-chip Program
Memory
User Memory
Space
0000h
The General Purpose Register file is accessed, either
directly or indirectly, through the File Select Register
(FSR). See
512 Words
01FFh
0200h
02FFh
Note 1:
Address 0000h becomes the
effective Reset vector. Location
01FFh contains the
MOVLW XX
internal oscillator calibration value.
DS41239D-page 16
©
2007 Microchip Technology Inc.
MICROCHIP [ MICROCHIP TECHNOLOGY ]
