PIC18F448 Datasheet PDF - Microchip

DEVICE OVERVIEW

●This document contains device specific information for the following devices:

●• PIC18F248

●• PIC18F258

●• PIC18F448

●• PIC18F458

●These devices are available in 28-pin, 40-pin and 44-pin packages. They are differentiated from each other in four ways:

●1\. PIC18FX58 devices have twice the Flash program memory and data RAM of PIC18FX48 devices (32 Kbytes and 1536 bytes vs. 16 Kbytes and 768 bytes, respectively).

●2\. PIC18F2X8 devices implement 5 A/D channels, as opposed to 8 for PIC18F4X8 devices.

●3\. PIC18F2X8 devices implement 3 I/O ports, while PIC18F4X8 devices implement 5.

●4\. Only PIC18F4X8 devices implement the Enhanced CCP module, analog comparators and the  Parallel Slave Port.

●All other features for devices in the PIC18FXX8 family, including the serial communications modules, are identical. These are summarized in Table 1-1. Block diagrams of the PIC18F2X8 and PIC18F4X8 devices are provided in Figure 1-1 and Figure 1-2, respectively. The pinouts for these device families are listed in Table 1-2.

●High-Performance RISC CPU:

●• Linear program memory addressing up to 2 Mbytes

●• Linear data memory addressing to 4 Kbytes

●• Up to 10 MIPS operation

●• DC – 40 MHz clock input

●• 4 MHz-10 MHz oscillator/clock input with PLL active

●• 16-bit wide instructions, 8-bit wide data path

●• Priority levels for interrupts

●• 8 x 8 Single-Cycle Hardware Multiplier

●Peripheral Features:

●• High current sink/source 25 mA/25 mA

●• Three external interrupt pins

●• Timer0 module: 8-bit/16-bit timer/counter with 8-bit programmable prescaler

●• Timer1 module: 16-bit timer/counter

●• Timer2 module: 8-bit timer/counter with 8-bit period register (time base for PWM)

●• Timer3 module: 16-bit timer/counter

●• Secondary oscillator clock option – Timer1/Timer3

●• Capture/Compare/PWM (CCP) modules; CCP pins can be configured as:

●\- Capture input: 16-bit, max resolution 6.25 ns

●\- Compare: 16-bit, max resolution 100 ns (TCY)

●\- PWM output: PWM resolution is 1 to 10-bit

●  Max. PWM freq. @:8-bit resolution = 156 kHz

●                   10-bit resolution = 39 kHz

●• Enhanced CCP module which has all the features of the standard CCP module, but also has the following features for advanced motor control:

●\- 1, 2 or 4 PWM outputs

●\- Selectable PWM polarity

●\- Programmable PWM dead time

●• Master Synchronous Serial Port (MSSP) with two modes of operation:

●\- 3-wire SPI™ (Supports all 4 SPI modes)

●\- I2C™ Master and Slave mode

●• Addressable USART module:

●\- Supports interrupt-on-address bit

●Advanced Analog Features:

●• 10-bit, up to 8-channel Analog-to-Digital Converter module (A/D) with:

●\- Conversion available during Sleep

●\- Up to 8 channels available

●• Analog Comparator module:

●\- Programmable input and output multiplexing

●• Comparator Voltage Reference module

●• Programmable Low-Voltage Detection (LVD) module:

●\- Supports interrupt-on-Low-Voltage Detection

●• Programmable Brown-out Reset (BOR) CAN bus Module Features:

●• Complies with ISO CAN Conformance Test

●• Message bit rates up to 1 Mbps

●• Conforms to CAN 2.0B Active Spec with:

●\- 29-bit Identifier Fields

●\- 8-byte message length

●\- 3 Transmit Message Buffers with prioritization

●\- 2 Receive Message Buffers

●\- 6 full, 29-bit Acceptance Filters

●\- Prioritization of Acceptance Filters

●\- Multiple Receive Buffers for High Priority

●  Messages to prevent loss due to overflow

●\- Advanced Error Management Features

●Special Microcontroller Features:

●• Power-on Reset (POR), Power-up Timer (PWRT) and Oscillator Start-up Timer (OST)

●• Watchdog Timer (WDT) with its own on-chip RC oscillator

●• Programmable code protection

●• Power-saving Sleep mode

●• Selectable oscillator options, including:

●\- 4x Phase Lock Loop (PLL) of primary oscillator

●\- Secondary Oscillator (32 kHz) clock input

●• In-Circuit Serial ProgrammingTM (ICSPTM) via two pins

●Flash Technology:

●• Low-power, high-speed Enhanced Flash technology

●• Fully static design

●• Wide operating voltage range (2.0V to 5.5V)

●• Industrial and Extended temperature ranges