PIC10F220_1 Datasheet, PDF (15/86 Pages) Microchip Technology – High-Performance Microcontrollers with 8-bit A/D

4.0 MEMORY ORGANIZATION
The PIC10F220/222 memories are organized into pro-
gram memory and data memory. Data memory banks
are accessed using the File Select Register (FSR).
4.1 Program Memory Organization for
the PIC10F220
The PIC10F220 devices have a 9-bit Program Counter
(PC) capable of addressing a 512 x 12 program
memory space.
Only the first 256 x 12 (0000h-00FFh) for the
PIC10F220 are physically implemented (see
Figure 4-1). Accessing a location above these
boundaries will cause a wrap-around within the first
256 x 12 space (PIC10F220). The effective Reset
vector is at 0000h, (see Figure 4-1). Location 00FFh
(PIC10F220) contains the internal clock oscillator
calibration value. This value should never be
overwritten.
FIGURE 4-1:
PROGRAM MEMORY MAP
AND STACK FOR THE
PIC10F220
CALL, RETLW
PC<7:0>
9
<8:0>
Stack Level 1
Stack Level 2
Reset Vector⁽¹⁾
On-chip Program
Memory
0000h
PIC10F220/222
4.2 Program Memory Organization for
the PIC10F222
The PIC10F222 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 Mem-
High are physically implemented (see Figure 4-2).
Accessing a location above these boundaries will
cause a wrap-around within the first 512 x 12 space
(PIC10F222). The effective Reset vector is at 0000h,
(see Figure 4-2). Location 01FFh (PIC10F222) con-
tains the internal clock oscillator calibration value.
This value should never be overwritten.
FIGURE 4-2:
PROGRAM MEMORY MAP
AND STACK FOR THE
PIC10F222
CALL, RETLW
PC<8:0>
10
<9:0>
Stack Level 1
Stack Level 2
Reset Vector⁽¹⁾
On-chip Program
Memory
0000h
512 Words
01FFh
0200h
256 Word
00FFh
0100h
01FFh
Note 1:
Address 0000h becomes the
effective Reset vector. Location 00FFh
contains the MOVLW XX internal oscillator
calibration value.
02FFh
Note 1:
Address 0000h becomes the effective
Reset vector. Location 01FFh contains the
MOVLW XX internal oscillator calibration
value.
© 2007 Microchip Technology Inc.
DS41270E-page 13