Microchip received ISO/TS-16949:2002 quality system certification for
its worldwide headquarters, design and wafer fabrication facilities in
Chandler and Tempe, Arizona and Mountain View, California in
October 2003. The Company’s quality system processes and
procedures are for its PICmicro
®
8-bit MCUs, 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.
DS41236A-page ii
Preliminary
2004 Microchip Technology Inc.
PIC12F508/509/16F505
8/14-Pin, 8-Bit Flash Microcontroller
Devices Included In This Data Sheet:
• PIC12F508
• PIC12F509
• PIC16F505
- LP:
- EC:
Power-saving, low-frequency crystal
High-speed external clock input
(PIC16F505 only)
Low-Power Features/CMOS Technology:
• Operating Current:
- < 350
µA
@ 2V, 4 MHz
• Standby Current:
- 100 nA @ 2V, typical
• Low-power, high-speed Flash technology:
- 100,000 Flash endurance
- > 40 year retention
• Fully static design
• Wide operating voltage range: 2.0V to 5.5V
• Wide temperature range:
- Industrial: -40°C to +85°C
- Extended: -40°C to +125°C
High-Performance RISC CPU:
• Only 33 single-word instructions to learn
• All single-cycle instructions except for program
branches, which are two-cycle
• 12-bit wide instructions
• 2-level deep hardware stack
• Direct, Indirect and Relative Addressing modes
for data and instructions
• 8-bit wide data path
• 8 Special Function Hardware registers
• Operating speed:
- DC – 20 MHz clock input (PIC16F505 only)
- DC – 200 ns instruction cycle (PIC16F505
only)
- DC – 4 MHz clock input
- DC – 1000 ns instruction cycle
Peripheral Features (PIC12F508/509):
• 6 I/O pins:
- 5 I/O pins with individual direction control
- 1 input only pin
- High current sink/source for direct LED drive
- Wake-on-change
- Weak pull-ups
• 8-bit real-time clock/counter (TMR0) with 8-bit
programmable prescaler
Special Microcontroller Features:
• 4 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 precision Internal oscillator
- EXTRC: External low-cost RC oscillator
- XT:
Standard crystal/resonator
- HS:
High-speed crystal/resonator
(PIC16F505 only)
Peripheral Features (PIC16F505):
• 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-on-change
- Weak pull-ups
• 8-bit real-time clock/counter (TMR0) with 8-bit
programmable prescaler
2004 Microchip Technology Inc.
Preliminary
DS41236A-page 1
PIC12F508/509/16F505
Pin Diagrams
PDIP, SOIC, TSSOP
PDIP, SOIC, MSOP
V
DD
RB5/OSC1/CLKIN
RB4/OSC2/CLKOUT
RB3/MCLR/V
PP
RC5/T0CKI
RC4
RC3
1
2
PIC16F505
3
4
5
6
7
14
13
12
11
10
9
8
V
SS
RB0/ICSPDAT
RB1/ISCPCLK
RB2
RC0
RC1
RC2
PIC12F508/509
V
DD
GP5/OSC1/CLKIN
GP4/OSC2
GP3/MCLR/V
PP
1
2
3
4
8
7
6
5
V
SS
GP0/ICSPDAT
GP1/ICSPCLK
GP2/T0CKI
Program Memory
Device
Flash (words)
PIC12F508
PIC12F509
PIC16F505
512
1024
1024
Data Memory
I/O
SRAM (bytes)
25
41
72
6
6
12
Timers
8-bit
1
1
1
DS41236A-page 2
Preliminary
2004 Microchip Technology Inc.
PIC12F508/509/16F505
Table of Contents
1.0 General Description...................................................................................................................................................................... 5
5.0 I/O Port ....................................................................................................................................................................................... 29
6.0 Timer0 Module and TMR0 Register ........................................................................................................................................... 33
7.0 Special Features Of The CPU.................................................................................................................................................... 39
8.0 Instruction Set Summary ............................................................................................................................................................ 55
9.0 Development Support................................................................................................................................................................. 63
11.0 DC and AC Characteristics Graphs and Charts ......................................................................................................................... 81
Index .................................................................................................................................................................................................... 91
Systems Information and Upgrade Hot Line ........................................................................................................................................ 93
Product Identification System .............................................................................................................................................................. 95
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It is our intention to provide our valued customers with the best documentation possible to ensure successful use of your Micro-
chip products. To this end, we will continue to improve our publications to better suit your needs. Our publications will be refined
and enhanced as new volumes and updates are introduced.
If you have any questions or comments regarding this publication, please contact the Marketing Communications Department via
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in the back of this data sheet to (480) 792-4150.
We welcome your feedback.
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To obtain the most up-to-date version of this data sheet, please register at our Worldwide Web site at:
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You can determine the version of a data sheet by examining its literature number found on the bottom outside corner of any page.
The last character of the literature number is the version number, (e.g., DS30000A is version A of document DS30000).
Errata
An errata sheet, describing minor operational differences from the data sheet and recommended workarounds, may exist for current
devices. As device/documentation issues become known to us, we will publish an errata sheet. The errata will specify the revision
of silicon and revision of document to which it applies.
To determine if an errata sheet exists for a particular device, please check with one of the following:
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