PIC18F14K50-I/SS【PDF 2/285 页】IC PIC MCU FLASH 8KX16 20-SSOP

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PIC18F1XK50/PIC18LF1XK50

DS41350E-page 10

Preliminary

2010 Microchip Technology Inc.

1.2

Other Special Features

Memory Endurance: The Flash cells for both

program memory and data EEPROM are rated to

last for many thousands of erase/write cycles – up to

1K for program memory and 100K for EEPROM.

Data retention without refresh is conservatively

estimated to be greater than 40 years.

Self-programmability: These devices can write

to their own program memory spaces under

internal software control. Using a bootloader

routine located in the code protected Boot Block,

it is possible to create an application that can

update itself in the field.

Extended Instruction Set: The PIC18F/

LF1XK50 family introduces an optional extension

to the PIC18 instruction set, which adds 8 new

instructions and an Indexed Addressing mode.

This extension has been specifically designed to

optimize re-entrant application code originally

developed in high-level languages, such as C.

Enhanced CCP module: In PWM mode, this

module provides 1, 2 or 4 modulated outputs for

controlling half-bridge and full-bridge drivers.

Other features include:

Auto-Shutdown, for disabling PWM outputs

on interrupt or other select conditions

- Auto-Restart, to reactivate outputs once the

condition has cleared

- Output steering to selectively enable one or

more of 4 outputs to provide the PWM signal.

Enhanced Addressable USART: This serial

communication module is capable of standard

RS-232 operation and provides support for the LIN

bus protocol. Other enhancements include

automatic baud rate detection and a 16-bit Baud

Rate Generator for improved resolution.

10-bit A/D Converter: This module incorporates

programmable acquisition time, allowing for a

channel to be selected and a conversion to be

initiated without waiting for a sampling period and

thus, reduce code overhead.

Extended Watchdog Timer (WDT): This

enhanced version incorporates a 16-bit

postscaler, allowing an extended time-out range

that is stable across operating voltage and

temperature. See Section 27.0 “Electrical

Specifications” for time-out periods.

1.3

Details on Individual Family

Members

Devices in the PIC18F/LF1XK50 family are available in

20-pin packages. Block diagrams for the two groups

are shown in Figure 1-1.

The devices are differentiated from each other in the

following ways:

Flash program memory:

8 Kbytes for PIC18F13K50/PIC18LF13K50

16 Kbytes for PIC18F14K50/PIC18LF14K50

On-chip 3.2V LDO regulator for PIC18F13K50

and PIC18F14K50.

All other features for devices in this family are identical.

These are summarized in Table 1-1.

The pinouts for all devices are listed in Table 1 and I/O

description are in Table 1-2.

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