MA180025 Microchip Technology, MA180025 Datasheet - Page 65

• Manufacturer Part Number: MA180025
• Description: MODULE PLUG-IN PIC18F87J90 PIM
• Manufacturer: Microchip Technology
• Series: PIC®r

Specifications of MA180025

• Accessory Type: Plug-In Module (PIM) - PIC18F87J90
• Product: Microcontroller Modules
• Silicon Manufacturer: Microchip
• Core Architecture: PIC
• Core Sub-architecture: PIC18
• Silicon Core Number: PIC18F
• Silicon Family Name: PIC18FxxJxx
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: PICDEM LCD 2 Demonstration Board (DM163030)
• For Use With: DM163030 - KIT DEV PICDEM LCD2
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

6.0
There are two types of memory in PIC18 Flash
microcontroller devices:
• Program Memory
• Data RAM
As Harvard architecture devices, the data and program
memories use separate busses; this allows for
concurrent access of the two memory spaces.
Additional detailed information on the operation of the
Flash program memory is provided in Section 7.0
“Flash Program Memory”.
FIGURE 6-1:
 2010 Microchip Technology Inc.
MEMORY ORGANIZATION
Note:
CALL, CALLW, RCALL,
RETURN, RETFIE, RETLW,
ADDULNK, SUBULNK
Sizes of memory areas are not to scale. Sizes of program memory areas are enhanced to show detail.
Unimplemented
PIC18FX6J90
Config. Words
Read as ‘0’
MEMORY MAPS FOR PIC18F87J90 FAMILY DEVICES
On-Chip
Memory
Stack Level 31
Stack Level 1
PC<20:0>

 
Unimplemented
PIC18FX7J90
Config. Words
Read as ‘0’
On-Chip
Memory
PIC18F87J90 FAMILY
6.1
PIC18 microcontrollers implement a 21-bit program
counter which is capable of addressing a 2-Mbyte
program memory space. Accessing a location between
the upper boundary of the physically implemented
memory and the 2-Mbyte address will return all ‘0’s (a
NOP instruction).
The entire PIC18F87J90 family offers a range of
on-chip Flash program memory sizes, from 64 Kbytes
(up to 16,384 single-word instructions) to 128 Kbytes
(65,536
memory maps for individual family members are shown
in Figure 6-1.
21
Program Memory Organization
single-word
instructions).
000000h
00FFFFh
01FFFFh
1FFFFFh
DS39933D-page 65
The
program