PIC16F913/914/916/917/946
2.2
Data Memory Organization
The data memory is partitioned into multiple banks
which contain the General Purpose Registers (GPRs)
and the Special Function Registers (SFRs). Bits RP0
and RP1 are bank select bits.
RP1
0
RP0
0
→
→
→
→
Bank 0 is selected
Bank 1 is selected
Bank 2 is selected
Bank 3 is selected
0
1
1
0
1
1
Each bank extends up to 7Fh (128 bytes). The lower
locations of each bank are reserved for the Special
Function Registers. Above the Special Function
Registers are the General Purpose Registers,
implemented as static RAM. All implemented banks
contain Special Function Registers. Some frequently
used Special Function Registers from one bank are
mirrored in another bank for code reduction and
quicker access.
2.2.1
GENERAL PURPOSE REGISTER
FILE
The register file is organized as 256 x 8 bits in the
PIC16F913/914, 352 x 8 bits in the PIC16F916/917 and
336 x 8 bits in the PIC16F946. Each register is accessed
either directly or indirectly through the File Select
Register (FSR) (see Section 2.5 “Indirect Addressing,
INDF and FSR Registers”).
2.2.2
SPECIAL FUNCTION REGISTERS
The Special Function Registers are registers used by
the CPU and peripheral functions for controlling the
desired operation of the device (see Tables 2-1, 2-2,
2-3 and 2-4). These registers are static RAM.
The Special Function Registers can be classified into
two sets: core and peripheral. The Special Function
Registers associated with the “core” are described in
this section. Those related to the operation of the
peripheral features are described in the section of that
peripheral feature.
DS41250F-page 24
© 2007 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
