PIC16F1938 Datasheet, PDF (25/452 Pages) Microchip Technology – 28/40/44-Pin Flash-Based, 8-Bit CMOS Microcontrollers

3.0 MEMORY ORGANIZATION
There are three types of memory in PIC16(L)F1938/9
devices: Data Memory, Program Memory and Data
EEPROM Memory⁽¹⁾.
• Program Memory
• Data Memory
- Core Registers
- Special Function Registers
- General Purpose RAM
- Common RAM
- Device Memory Maps
- Special Function Registers Summary
• Data EEPROM memory⁽¹⁾
Note 1: The data EEPROM memory and the
method to access Flash memory through
the EECON registers is described in
Section 11.0 “Data EEPROM and Flash
Program Memory Control”.
PIC16(L)F1938/9
The following features are associated with access and
control of program memory and data memory:
• PCL and PCLATH
• Stack
• Indirect Addressing
3.1 Program Memory Organization
The enhanced mid-range core has a 15-bit program
counter capable of addressing 32K x 14 program
memory space. Table 3-1 shows the memory sizes
implemented for the PIC16(L)F1938/9 family. Accessing
a location above these boundaries will cause a
wrap-around within the implemented memory space.
The Reset vector is at 0000h and the interrupt vector is
at 0004h (see Figure 3-1).
TABLE 3-1: DEVICE SIZES AND ADDRESSES
Device
PIC16F1938/PIC16LF1938
PIC16F1939/PIC16LF1939
Program Memory Space (Words)
16,384
16,384
Last Program Memory Address
3FFFh
3FFFh
 2011 Microchip Technology Inc.
Preliminary
DS41574A-page 25