PIC16F1938_13 Datasheet, PDF (25/488 Pages) Microchip Technology – 28/40/44-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver

3.3.1 SPECIAL FUNCTION REGISTER
The Special Function Registers are registers used by
the application to control the desired operation of
peripheral functions in the device. The registers asso-
ciated with the operation of the peripherals are
described in the appropriate peripheral chapter of this
data sheet.
3.3.2 GENERAL PURPOSE RAM
There are up to 80 bytes of GPR in each data memory
bank.
3.3.2.1 Linear Access to GPR
The general purpose RAM can be accessed in a
non-banked method via the FSRs. This can simplify
access to large memory structures. See Section 3.6.2
“Linear Data Memory” for more information.
3.3.3 COMMON RAM
There are 16 bytes of common RAM accessible from all
banks.
FIGURE 3-2:
BANKED MEMORY
PARTITIONING
7-bit Bank Offset
Memory Region
00h
Core Registers
(12 bytes)
0Bh
0Ch
Special Function Registers
(20 bytes maximum)
1Fh
20h
PIC16(L)F1938/9
3.3.4 DEVICE MEMORY MAPS
The memory maps for the device family are as shown
in Table 3-2.
TABLE 3-2:
Device
PIC16F1938
PIC16LF1938
PIC16F1939
PIC16LF1939
MEMORY MAP TABLES
Banks
Table No.
0-7
8-15
16-23
23-31
0-7
8-15
16-23
23-31
Table 3-3
Table 3-4, Table 3-7
Table 3-5
Table 3-6, Table 3-9
Table 3-3
Table 3-4, Table 3-8
Table 3-5
Table 3-6, Table 3-9
General Purpose RAM
(80 bytes maximum)
6Fh
70h
Common RAM
(16 bytes)
7Fh
 2011-2013 Microchip Technology Inc.
DS40001574C-page 25