PIC18F6621-I/PT Microchip Technology Inc., PIC18F6621-I/PT Datasheet - Page 9

• Manufacturer Part Number: PIC18F6621-I/PT
• Description: 64 PIN, 64 KB FLASH, 3840 RAM, 52 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F6621-I/PT

• A/d Inputs: 12-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 10 MIPS
• Eeprom Memory: 1024 Bytes
• Input Output: 54
• Interface: I2C/SPI/UART/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 64-pin TQFP
• Programmable Memory: 64K Bytes
• Ram Size: 3.8K Bytes
• Speed: 40 MHz
• Timers: 2-8-bit, 3-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

1.0
This document contains device specific information for
the following devices:
• PIC18F6525
• PIC18F6621
• PIC18F8525
• PIC18F8621
This
PIC18 microcontrollers – namely, high computational
performance at an economical price – with the addition
of high-endurance Enhanced Flash program memory.
The PIC18F6525/6621/8525/8621 family also provides
an enhanced range of program memory options and
versatile analog features that make it ideal for complex,
high performance applications.
1.1
1.1.1
The PIC18F6525/6621/8525/8621 family provides
ample room for application code and includes
members with 48 Kbytes or 64 Kbytes of code space.
Other memory features are:
• Data RAM and Data EEPROM: The PIC18F6525/
• Memory Endurance: The Enhanced Flash cells for
1.1.2
In the unlikely event that 64 Kbytes of program memory
is inadequate for an application, the PIC18F8525/8621
members of the family also implement an external
memory interface. This allows the controller’s internal
program counter to address a memory space of up to
2 MBytes, permitting a level of data access that few
8-bit devices can claim.
 2005 Microchip Technology Inc.
6621/8525/8621 family also provides plenty of room
for application data. The devices have 3840 bytes of
data RAM, as well as 1024 bytes of data EEPROM
for long term retention of nonvolatile data.
both program memory and data EEPROM are rated
to last for many thousands of erase/write cycles –
up to 100,000 for program memory and 1,000,000
for EEPROM. Data retention without refresh is
conservatively
40 years.
family
DEVICE OVERVIEW
Key Features
EXPANDED MEMORY
EXTERNAL MEMORY INTERFACE
offers
estimated
the
to
advantages
be
greater
PIC18F6525/6621/8525/8621
of
than
all
With the addition of new operating modes, the external
memory interface offers many new options, including:
• Operating the microcontroller entirely from external
• Using combinations of
• Using external Flash memory for reprogrammable
• Using external RAM devices for storing large
1.1.3
Regardless of the memory size, all devices share the
same rich set of peripherals, allowing for a smooth
migration path as applications grow and evolve.
The consistent pinout scheme used throughout the
entire family also aids in migrating to the next larger
device. This is true when moving between the 64-pin
members, between the 80-pin members, or even
Jumping From 64-pin To 80-pin Devices.
1.1.4
• Communications:
• CCP Modules: All devices in the family incorporate
• Analog Features: All devices in the family feature
• Self-programmability: These devices can write to
memory
memory, up to the 2-Mbyte limit
application code or large data tables
amounts of variable data
8621 family incorporates a range of serial communi-
cation
Enhanced USARTs and a Master SSP module capa-
ble of both SPI and I
operation. Also, for PIC18F6525/6621/8525/8621
devices, one of the general purpose I/O ports can be
reconfigured as an 8-bit Parallel Slave Port for direct
processor to processor communications.
two Capture/Compare/PWM (CCP) modules and
three Enhanced CCP (ECCP) modules to maximize
flexibility in control applications. Up to four different
time bases may be used to perform several different
operations at once. Each of the three ECCPs offer
up to four PWM outputs, allowing for a total of
12 PWMs. The ECCPs also offer many beneficial
features, including polarity selection, Programmable
Dead Time, Auto-Shutdown and Restart and
Half-Bridge and Full-Bridge Output modes.
10-bit A/D converters with up to 16 input channels,
as well as the ability to perform conversions during
Sleep mode and auto-acquisition conversions. Also
included
programmable input and output configuration, a
programmable Low-Voltage Detect module and a
Programmable Brown-out Reset module.
their own program memory spaces under internal
software control. By using a bootloader routine
located in the protected boot block at the top of
program memory, it becomes possible to create an
application that can update itself in the field.
peripherals,
EASY MIGRATION
OTHER SPECIAL FEATURES
are
dual
2
C (Master and Slave) modes of
The
analog
including
PIC18F6525/6621/8525/
on-chip and
comparators
DS39612B-page 7
2
independent
external
with