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28/40/44/48-Pin, Low-Power, High-Performance Microcontroller with XLP Technology

PIC18F26Q84 PIC18F46Q84 PIC18F56Q84

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38 CAN FD - Controller Area Network, Flexible Data-Rate
38.2 Modes of Operation
38.2.5 Debug Modes
38.2.5.3 Loopback Mode
38.2.5.3.2 External Loopback Mode

Introduction
PIC18-Q84 Family Types
Features
1 Packages
2 Pin Diagrams
3 Pin Allocation Tables
4 Guidelines for Getting Started with PIC18-Q84 Microcontrollers
5 Register and Bit Naming Conventions
6 Register Legend
7 PIC18 CPU
8 Device Configuration
9 Memory Organization
10 NVM - Nonvolatile Memory Module
11 VIC - Vectored Interrupt Controller Module
12 OSC - Oscillator Module (With Fail-Safe Clock Monitor)
13 CRC - Cyclic Redundancy Check Module with Memory Scanner
14 Resets
15 WWDT - Windowed Watchdog Timer
16 DMA - Direct Memory Access
17 Power-Saving Modes
18 PMD - Peripheral Module Disable
19 I/O Ports
20 IOC - Interrupt-on-Change
21 PPS - Peripheral Pin Select Module
22 CLC - Configurable Logic Cell
23 CLKREF - Reference Clock Output Module
24 TMR0 - Timer0 Module
25 TMR1 - Timer1 Module with Gate Control
26 TMR2 - Timer2 Module
27 SMT - Signal Measurement Timer
28 UTMR - Universal Timer Module
29 CCP - Capture/Compare/PWM Module
30 Capture, Compare, and PWM Timers Selection
31 PWM - Pulse-Width Modulator with Compare
32 CWG - Complementary Waveform Generator Module
33 NCO - Numerically Controlled Oscillator Module
34 DSM - Data Signal Modulator Module
35 UART - Universal Asynchronous Receiver Transmitter with Protocol Support
36 SPI - Serial Peripheral Interface Module
37 I²C - Inter-Integrated Circuit Module
38 CAN FD - Controller Area Network, Flexible Data-Rate
39 JTAG Boundary Scan
40 HLVD - High/Low-Voltage Detect
41 FVR - Fixed Voltage Reference
42 Temperature Indicator Module
43 ADC - Analog-to-Digital Converter with Computation and Context Module
44 DAC - Digital-to-Analog Converter Module - 8-Bit
45 CMP - Comparator Module
46 ZCD - Zero-Cross Detection Module
47 Instruction Set Summary
48 ICSP™ - In-Circuit Serial Programming™
49 Register Summary
50 Electrical Specifications
51 DC and AC Characteristics Graphs and Tables
52 Packaging Information
53 Appendix A: Revision History
Microchip Information

38.2.5.3.2 External Loopback Mode

The transmit signal is internally connected to receive and transmit messages and can be monitored on the CxTX pin.

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