PIC18F010T-I/SN View Datasheet(PDF) - Microchip Technology
Part Name
Description
MFG CO.
'PIC18F010T-I/SN' PDF : 176 Pages View PDF
4.0 MEMORY ORGANIZATION
There are three memory blocks in PIC18F010/020
Enhanced MCU devices. These memory blocks are:
• Program Memory
• Data Memory
• EEPROM Data Memory
The EEPROM Data Memory is described in detail in
Section 5.0.
4.1 Program Memory Organization
The PIC18F010/020 devices have a 21-bit program
counter. Bits 12 through 16 are implemented as ‘0’
internally; therefore, accessing locations 0x01000
through 0x1FFFF actually mirror what is present in pro-
gram memory from 0x0000 through 0x0FFF. The
PIC18F010 device reads all zeros (NOP) from 0x0800
through 0x0FFF.
PIC18F020 has 4 Kbytes of FLASH program memory,
while PIC18F010 has 2 Kbytes of FLASH program
memory. This means the PIC18F020 can store up to 2K
of single word instructions, and the PICF18010 can
store up to 1K of single word instructions.
The RESET vector address is at 0000h and the inter-
rupt vector addresses are at 0008h and 0018h. 0008h
is the high priority interrupt and 0018h is the low priority
interrupt vector.
Figure 4-1 shows the Program Memory Map for
PIC18F010 and Figure 4-2 shows the Program Mem-
ory Map for PIC18F020 devices.
PIC18F010/020
2001 Microchip Technology Inc.
Preliminary
DS41142A-page 23
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