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  Microchip Technology Semiconductor Electronic Components Datasheet  

PIC18F8721 Datasheet

(PIC18Fxxxx) 1-Mbit Enhanced Flash Microcontrollers

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PIC18F6625/6721/8625/8721
64/80-Pin High-Performance, 1-Mbit Enhanced Flash
Microcontrollers with A/D and nanoWatt Technology
Power Managed Modes:
• Run: CPU on, peripherals on
• Idle: CPU off, peripherals on
• Sleep: CPU off, peripherals off
• Idle mode currents down to 5.8 µA typical
• Sleep current down to 0.1 µA typical
• Timer1 Oscillator: 1.8 µA, 32 kHz, 2V
• Watchdog Timer: 2.1 µA
• Two-Speed Oscillator Start-up
Flexible Oscillator Structure:
• Four Crystal modes, up to 40 MHz
• 4X Phase Lock Loop (available for crystal and
internal oscillators)
• Two External RC modes, up to 4 MHz
• Two External Clock modes, up to 40 MHz
• Internal oscillator block:
- 8 user selectable frequencies, from 31 kHz to 8 MHz
- Provides a complete range of clock speeds from
31 kHz to 32 MHz when used with PLL
- User tunable to compensate for frequency drift
• Secondary oscillator using Timer1 @ 32 kHz
• Fail-Safe Clock Monitor:
- Allows for safe shutdown if peripheral clock stops
External Memory Interface
(PIC18F8625/8721 only):
• Address capability of up to 2 Mbytes
• 8-bit or 16-bit interface
Peripheral Highlights:
• High current sink/source 25 mA/25 mA
• Four programmable external interrupts
• Four input change interrupts
• Two Capture/Compare/PWM (CCP) modules
Peripheral Highlights (Continued):
• Three Enhanced Capture/Compare/PWM (ECCP)
modules:
- One, two or four PWM outputs
- Selectable polarity
- Programmable dead-time
- Auto-Shutdown and Auto-Restart
• Two Master Synchronous Serial Port (MSSP)
modules supporting 3-wire SPI™ (all 4 modes) and
I2C™ Master and Slave modes
• Two Enhanced Addressable USART modules:
- Supports RS-485, RS-232 and LIN 1.2
- RS-232 operation using internal oscillator block
(no external crystal required)
- Auto-wake-up on Start bit
- Auto-baud detect
• 10-bit, up to 16-channel Analog-to-Digital Converter
module (A/D)
- Auto-acquisition capability
- Conversion available during Sleep
• Dual analog comparators with input multiplexing
Special Microcontroller Features:
• C compiler optimized architecture:
- Optional extended instruction set designed to
optimize re-entrant code
• 100,000 erase/write cycle Enhanced Flash program
memory typical
• 1,000,000 erase/write cycle Data EEPROM memory
typical
• Flash/Data EEPROM Retention: 100 years typical
• Self-programmable under software control
• Priority levels for interrupts
• 8 X 8 Single Cycle Hardware Multiplier
• Extended Watchdog Timer (WDT):
- Programmable period from 4 ms to 131s
• Single-supply 5V In-Circuit Serial Programming™
(ICSP™) via two pins
• In-Circuit Debug (ICD) via two pins
• Wide operating voltage range: 2.0V to 5.5V
Device
Program Memory Data Memory
Flash
(bytes)
# Single-
Word
Instructions
SRAM EEPROM
(bytes) (bytes)
I/O
10-bit
A/D (ch)
CCP/
ECCP
(PWM)
PIC18F6625
PIC18F6721
PIC18F8625
PIC18F8721
96 K
128 K
96 K
128 K
49152
65536
49152
65536
3936
3936
3936
3936
1024
1024
1024
1024
54
54
70
70
12
12
16
16
2/3
2/3
2/3
2/3
2
2
2
2
MSSP
SPI
Master
I2C
YY2
YY2
YY2
YY2
2 2/3 N
2 2/3 N
2 2/3 Y
2 2/3 Y
2004 Microchip Technology Inc.
www.DataSheet4U.com
DS39627A-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

PIC18F8721 Datasheet

(PIC18Fxxxx) 1-Mbit Enhanced Flash Microcontrollers

No Preview Available !

PIC18F6625/6721/8625/8721
Pin Diagrams
64-Pin TQFP
RE1/WR/P2C
RE0/RD/P2D
RG0/ECCP3/P3A
RG1/TX2/CK2
RG2/RX2/DT2
RG3/CCP4/P3D
RG5/MCLR/VPP
RG4/CCP5/P1D
VSS
VDD
RF7/SS1
RF6/AN11
RF5/AN10/CVREF
RF4/AN9
RF3/AN8
RF2/AN7/C1OUT
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
1 48
2 47
3 46
4 45
5 44
6 43
7 42
8
PIC18F6625
41
9
PIC18F6721
40
10 39
11 38
12 37
13 36
14 35
15 34
16 33
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
RB0/INT0
RB1/INT1
RB2/INT2
RB3/INT3
RB4/KBI0
RB5/KBI1/PGM
RB6/KBI2/PGC
VSS
RA6/OSC2/CLKO
RA7/OSC1/CLKI
VDD
RB7/KBI3/PGD
RC5/SDO1
RC4/SDI1/SDA1
RC3/SCK1/SCL1
RC2/ECCP1/P1A
Note 1: RB3 is the alternate pin for ECCP2/P2A multiplexing.
DS39627A-page 2
2004 Microchip Technology Inc.


Part Number PIC18F8721
Description (PIC18Fxxxx) 1-Mbit Enhanced Flash Microcontrollers
Maker Microchip Technology
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PIC18F8721 Datasheet PDF






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