PIC16F720-ESLASHSS datasheet(14/244 Pages) MICROCHIP

14 / 244 page

PIC16F/LF720/721

DS41430A-page 14

 2010 Microchip Technology Inc.

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

RP0



Bank 0 is selected



Bank 1 is selected



Bank 2 is selected



Bank 3 is selected

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 128 x 8 bits in the

PIC16F720/LF720, 256 x 8 bits in the PIC16F721/

LF721. Each register is accessed either directly or

indirectly through the File Select Register (FSR), (Refer

to 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 (refer to Table 2-1).

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.

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