PIC18F65J50T View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC18F65J50T

64/80-Pin High-Performance, 1-Mbit Flash USB Microcontrollers with nanoWatt Technology

Microchip Technology 

PIC18F87J50 FAMILY

1.1.5 EXTERNAL MEMORY BUS

In the event that 128 Kbytes of memory are inadequate

for an application, the 80-pin members of the

PIC18F87J50 family also implement an External Mem-

ory Bus (EMB). 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. This allows additional memory

options, including:

• Using combinations of on-chip and external

memory up to the 2-Mbyte limit

• Using external Flash memory for reprogrammable

application code or large data tables

• Using external RAM devices for storing large

amounts of variable data

1.1.6 EXTENDED INSTRUCTION SET

The PIC18F87J50 family implements the optional

extension to the PIC18 instruction set, adding 8 new

instructions and an Indexed Addressing mode.

Enabled as a device configuration option, the extension

has been specifically designed to optimize re-entrant

application code originally developed in high-level

languages, such as ‘C’.

1.1.7 EASY MIGRATION

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.

The PIC18F87J50 family is also pin compatible with

other PIC18 families, such as the PIC18F87J10,

PIC18F87J11, PIC18F8720 and PIC18F8722. This

allows a new dimension to the evolution of applications,

allowing developers to select different price points

within Microchip’s PIC18 portfolio, while maintaining

the same feature set.

1.2 Other Special Features

• Communications: The PIC18F87J50 family

incorporates a range of serial and parallel com-

munication peripherals, including a fully featured

Universal Serial Bus communications module that

is compliant with the USB Specification

Revision 2.0. This device also includes 2 indepen-

dent Enhanced USARTs and 2 Master SSP

modules, capable of both SPI and I2C™ (Master

and Slave) modes of operation. The device also

has a parallel port and can be configured to serve

as either a Parallel Master Port or as a Parallel

Slave Port.

• CCP Modules: All devices in the family incorporate

two Capture/Compare/PWM (CCP) modules and

three Enhanced CCP 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 offers 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 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, reducing code overhead.

• Extended Watchdog Timer (WDT): This

enhanced version incorporates a 16-bit prescaler,

allowing an extended time-out range that is stable

across operating voltage and temperature. See

Section 28.0 “Electrical Characteristics” for

time-out periods.

1.3 Details on Individual Family

Members

Devices in the PIC18F87J50 family are available in

64-pin and 80-pin packages. Block diagrams for the

two groups are shown in Figure 1-1 and Figure 1-2.

The devices are differentiated from each other in two

ways:

1. Flash program memory (six sizes, ranging from

32 Kbytes for PIC18FX5J50 devices to

128 Kbytes for PIC18FX7J50).

2. I/O ports (7 bidirectional ports on 64-pin devices,

9 bidirectional ports on 80-pin devices).

All other features for devices in this family are identical.

These are summarized in Table 1-1 and Table 1-2.

The pinouts for all devices are listed in Table 1-3 and

Table 1-4.

DS39775B-page 8

Preliminary

© 2007 Microchip Technology Inc.

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