2010 Microchip Technology Inc.
DS41326E
PIC16F526
Data Sheet
14-Pin, 8-Bit Flash Microcontroller
DS41326E-page 2
2010 Microchip Technology Inc.
Information contained in this publication regarding device
applications and the like is provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
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intellectual property rights.
Trademarks
The Microchip name and logo, the Microchip logo, dsPIC,
K
EE
L
OQ
, K
EE
L
OQ
logo, MPLAB, PIC, PICmicro, PICSTART,
PIC
32
logo, rfPIC and UNI/O are registered trademarks of
Microchip Technology Incorporated in the U.S.A. and other
countries.
FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor,
MXDEV, MXLAB, SEEVAL and The Embedded Control
Solutions Company are registered trademarks of Microchip
Technology Incorporated in the U.S.A.
Analog-for-the-Digital Age, Application Maestro, CodeGuard,
dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN,
ECONOMONITOR, FanSense, HI-TIDE, In-Circuit Serial
Programming, ICSP, Mindi, MiWi, MPASM, MPLAB Certified
logo, MPLIB, MPLINK, mTouch, Octopus, Omniscient Code
Generation, PICC, PICC-18, PICDEM, PICDEM.net, PICkit,
PICtail, REAL ICE, rfLAB, Select Mode, Total Endurance,
TSHARC, UniWinDriver, WiperLock and ZENA are
trademarks of Microchip Technology Incorporated in the
U.S.A. and other countries.
SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.
All other trademarks mentioned herein are property of their
respective companies.
© 2010, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
ISBN: 978-1-60932-355-4
Note the following details of the code protection feature on Microchip devices:
•
Microchip products meet the specification contained in their particular Microchip Data Sheet.
•
Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
•
There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
•
Microchip is willing to work with the customer who is concerned about the integrity of their code.
•
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Microchip received ISO/TS-16949:2002 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona; Gresham, Oregon and design centers in California
and India. The Company’s quality system processes and procedures
are for its PIC
®
MCUs and dsPIC
®
DSCs, K
EE
L
OQ
®
code hopping
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
2010 Microchip Technology Inc.
DS41326E-page 3
PIC16F526
High-Performance RISC CPU:
• Only 33 Single-Word Instructions
• All Single-Cycle Instructions except for Program
Branches which are Two-Cycle
• Two-Level Deep Hardware Stack
• Direct, Indirect and Relative Addressing modes
for Data and Instructions
• Operating Speed:
- DC – 20 MHz crystal oscillator
- DC – 200 ns instruction cycle
• On-chip Flash Program Memory:
- 1024 x 12
• General Purpose Registers (SRAM):
- 67 x 8
• Flash Data Memory:
- 64 x 8
Special Microcontroller Features:
• 8 MHz Precision Internal Oscillator:
- Factory calibrated to ±1%
• In-Circuit Serial Programming™ (ICSP™)
• In-Circuit Debugging (ICD) Support
• Power-On Reset (POR)
• Device Reset Timer (DRT)
• Watchdog Timer (WDT) with Dedicated On-Chip
RC Oscillator for Reliable Operation
• Programmable Code Protection
• Multiplexed MCLR Input Pin
• Internal Weak Pull-ups on I/O Pins
• Power-Saving Sleep mode
• Wake-Up from Sleep on Pin Change
• Selectable Oscillator Options:
- INTRC: 4 MHz or 8 MHz precision Internal
RC oscillator
- EXTRC: External low-cost RC oscillator
- XT:
Standard crystal/resonator
- HS:
High-speed crystal/resonator
- LP:
Power-saving, low-frequency crystal
- EC:
High-speed external clock input
Low-Power Features/CMOS Technology:
• Standby current:
- 100 nA @ 2.0V, typical
• Operating current:
- 11
A @ 32 kHz, 2.0V, typical
- 175
A @ 4 MHz, 2.0V, typical
• Watchdog Timer current:
- 1
A @ 2.0V, typical
- 7
A @ 5.0V, typical
• High Endurance Program and Flash Data Memory
cells:
- 100,000 write Program Memory endurance
- 1,000,000 write Flash Data Memory endurance
- Program and Flash Data retention: >40 years
• Fully Static Design
• Wide Operating Voltage Range: 2.0V to 5.5V:
- Wide temperature range
- Industrial: -40
C to +85C
- Extended: -40
C to +125C
Peripheral Features:
• 12 I/O Pins:
- 11 I/O pins with individual direction control
- 1 input-only pin
- High current sink/source for direct LED drive
- Wake-up on change
- Weak pull-ups
• 8-bit Real-time Clock/Counter (TMR0) with 8-bit
Programmable Prescaler
• Two Analog Comparators:
- Comparator inputs and output accessible
externally
- One comparator with 0.6V fixed on-chip
absolute voltage reference (V
REF
)
- One comparator with programmable on-chip
voltage reference (V
REF
)
• Analog-to-Digital (A/D) Converter:
- 8-bit resolution
- 3-channel external programmable inputs
- 1-channel internal input to internal absolute
0.6 voltage reference
Device
Program
Memory
Data Memory
I/O
Comparators
Timers 8-bit
8-bit A/D
Channels
Flash (words) SRAM (bytes)
Flash
(bytes)
PIC16F526
1024
67
64
12
2
1
3
14-Pin, 8-Bit Flash Microcontroller
PIC16F526
DS41326E-page 4
2010 Microchip Technology Inc.
FIGURE 1-1:
14-PIN PDIP, SOIC, TSSOP DIAGRAM
FIGURE 1-2:
16-PIN QFN DIAGRAM
V
DD
RB5/OSC1/CLKIN
RB4/OSC2/CLKOUT
RB3/MCLR/V
PP
RC5/T0CKI
RC4/C2OUT
RC3
V
SS
RB0/C1IN+/AN0/ICSPDAT
RB1/C1IN-/AN1/ICSPCLK
RB2/C1OUT/AN2
RC0/C2IN+
RC1/C2IN-
RC2/CV
REF
P
IC1
6F
526
1
2
3
4
5
6
7
8
9
10
11
12
13
14
PI
C16F
526
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
V
DD
NC
NC
GND
RC5/T0CKI
RB4/OSC2/CLKOUT
RB3/MCLR/V
PP
RB5/OSC1/CLKIN
RB0/C1IN+/AN0/ICSPDAT
RB1/C1IN-/AN1/ICSPCLK
RB2/C1OUT/AN2
RC0/C2IN+
RC4
/C2
O
UT
RC3
RC2
/C
V
RE
F
RC1
/C2
IN-
2010 Microchip Technology Inc.
DS41326E-page 5
PIC16F526
Table of Contents
1.0
General Description..................................................................................................................................................................... 7
2.0
PIC16F526 Device Varieties ...................................................................................................................................................... 9
3.0
Architectural Overview .............................................................................................................................................................. 11
4.0
Memory Organization ................................................................................................................................................................ 15
5.0
Flash Data Memory Control ...................................................................................................................................................... 23
6.0
I/O Port ...................................................................................................................................................................................... 27
7.0
Timer0 Module and TMR0 Register .......................................................................................................................................... 37
8.0
Special Features of the CPU..................................................................................................................................................... 43
9.0
Analog-to-Digital (A/D) Converter.............................................................................................................................................. 59
10.0 Comparator(s) ........................................................................................................................................................................... 63
11.0 Comparator Voltage Reference Module.................................................................................................................................... 69
12.0 Instruction Set Summary ........................................................................................................................................................... 71
13.0 Development Support................................................................................................................................................................ 79
14.0 Electrical Characteristics ........................................................................................................................................................... 83
15.0 DC and AC Characteristics Graphs and Charts ........................................................................................................................ 97
16.0 Packaging Information............................................................................................................................................................. 107
The Microchip Web Site.................................................................................................................................................................... 115
Customer Change Notification Service ............................................................................................................................................. 115
Customer Support............................................................................................................................................................................. 115
Reader Response ............................................................................................................................................................................. 116
Index .................................................................................................................................................................................................. 117
Product Identification System................ ........................................................................................................................................... 119
TO OUR VALUED CUSTOMERS
It is our intention to provide our valued customers with the best documentation possible to ensure successful use of your Micro-
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The last character of the literature number is the version number, (e.g., DS30000A is version A of document DS30000).
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An errata sheet, describing minor operational differences from the data sheet and recommended workarounds, may exist for current
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To determine if an errata sheet exists for a particular device, please check with one of the following:
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PIC16F526
DS41326E-page 6
2010 Microchip Technology Inc.
NOTES:
2010 Microchip Technology Inc.
DS41326E-page 7
PIC16F526
1.0
GENERAL DESCRIPTION
The PIC16F526 device from Microchip Technology is
low-cost, high-performance, 8-bit, fully-static, Flash-
based CMOS microcontrollers. It employs a RISC
architecture with only 33 single-word/single-cycle
instructions. All instructions are single cycle (200
s)
except for program branches, which take two cycles.
The PIC16F526 device delivers performance an order
of magnitude higher than their competitors in the same
price category. The 12-bit wide instructions are highly
symmetrical, resulting in a typical 2:1 code
compression over other 8-bit microcontrollers in its
class. The easy-to-use and easy to remember
instruction set reduces development time significantly.
The PIC16F526 product is equipped with special
features that reduce system cost and power
requirements. The Power-on Reset (POR) and Device
Reset Timer (DRT) eliminate the need for external
Reset circuitry. There are four oscillator configurations
to choose from, including INTRC Internal Oscillator
mode and the power-saving LP (Low-Power) Oscillator
mode. Power-Saving Sleep mode, Watchdog Timer
and code protection features improve system cost,
power and reliability.
The PIC16F526 device is available in the cost-effective
Flash programmable version, which is suitable for
production in any volume. The customer can take full
advantage of Microchip’s price leadership in Flash
programmable microcontrollers, while benefiting from
the Flash programmable flexibility.
The PIC16F526 product is supported by a full-featured
macro assembler, a software simulator, an in-circuit
emulator, a ‘C’ compiler, a low-cost development
programmer and a full featured programmer. All the
tools are supported on IBM
®
PC and compatible
machines.
1.1
Applications
The PIC16F526 device fits in applications ranging from
personal care appliances and security systems to low-
power remote transmitters/receivers. The Flash
technology makes customizing application programs
(transmitter codes, appliance settings, receiver
frequencies, etc.) extremely fast and convenient. The
small footprint packages, for through hole or surface
mounting, make these microcontrollers perfect for
applications with space limitations. Low cost, low
power, high performance, ease of use and I/O flexibility
make the PIC16F526 device very versatile even in
areas where no microcontroller use has been
considered before (e.g., timer functions, logic and
PLDs in larger systems and coprocessor applications).
TABLE 1-1:
FEATURES AND MEMORY OF PIC16F526
PIC16F526
Clock
Maximum Frequency of Operation (MHz)
20
Memory
Flash Program Memory
1024
SRAM Data Memory (bytes)
67
Flash Data Memory (bytes)
64
Peripherals
Timer Module(s)
TMR0
Wake-up from Sleep on Pin Change
Yes
Features
I/O Pins
11
Input Pins
1
Internal Pull-ups
Yes
In-Circuit Serial Programming
TM
Yes
Number of Instructions
33
Packages
14-pin PDIP, SOIC, TSSOP, QFN
The PIC16F526 device has Power-on Reset, selectable Watchdog Timer, selectable code-protect, high I/O current capability and
precision internal oscillator.
The PIC16F526 device uses serial programming with data pin RB0 and clock pin RB1.
PIC16F526
DS41326E-page 8
2010 Microchip Technology Inc.
NOTES:
2010 Microchip Technology Inc.
DS41326E-page 9
PIC16F526
2.0
PIC16F526 DEVICE VARIETIES
A variety of packaging options are available.
Depending on application and production
requirements, the proper device option can be selected
using the information in this section. When placing
orders, please use the PIC16F526 Product
Identification System at the back of this data sheet to
specify the correct part number.
2.1
Quick Turn Programming (QTP)
Devices
Microchip offers a QTP programming service for
factory production orders. This service is made
available for users who choose not to program
medium-to-high quantity units and whose code
patterns have stabilized. The devices are identical to
the Flash devices but with all Flash locations and fuse
options already programmed by the factory. Certain
code and prototype verification procedures do apply
before production shipments are available. Please
contact your local Microchip Technology sales office for
more details.
2.2
Serialized Quick Turn
Programming
SM
(SQTP
SM
) Devices
Microchip offers a unique programming service, where
a few user-defined locations in each device are
programmed with different serial numbers. The serial
numbers may be random, pseudo-random or
sequential.
Serial programming allows each device to have a
unique number, which can serve as an entry code,
password or ID number.
PIC16F526
DS41326E-page 10
2010 Microchip Technology Inc.
NOTES: