Microchip Technology DVA16XP186

Overview

DVA16XP186 from Microchip Technology Inc. is a device adapter for the MPLAB ICE 2000 in-circuit emulator system, designed specifically for 18-pin DIP PICmicro MCUs including PIC16F716. It provides target board interface, oscillator emulation, and configurable signal routing via mechanical switches. The adapter supports TIMER1 oscillator input (32–40 kHz), external clock injection, and MCLR/TOCKI/TIMER0 clock routing.

For engineers reviewing the DVA16XP186 datasheet, DVA16XP186 pinout, DVA16XP186 application, or DVA16XP186 equivalent, this adapter enables accurate low-voltage and high-frequency emulation of 18-pin DIP PIC microcontrollers while maintaining compatibility with PCM16YJ0 processor modules and supporting critical debug functions including freeze mode and external clock sourcing.

Technical Context

The DVA16XP186 interfaces between the MPLAB ICE 2000 emulator pod and 18-pin DIP target boards, delivering buffered clock signals from an on-board oscillator device to emulate PIC16F716 oscillator behavior. It routes RB1, RB2, RB3, RC5, OSC1, OSC2, and T0CKI signals via four mechanical switches per Table 5-6.

It supports both internal and external clocking modes, includes jumper-configurable TIMER1 oscillator enable/disable (via J1), and draws ≤10 mA from the target system even when emulator power is active. Its design matches the 0.300" DIP footprint with A = 2.000", B = 2.100" dimensions per DS51140M-page 10.

Key Specifications

Availability

DVA16XP186 is available at Aetrix Electronics and suitable for embedded firmware development, production validation, and PIC microcontroller qualification requiring stable component supply, long-term toolchain continuity, and legacy MPLAB ICE 2000 ecosystem support.

Supply support for DVA16XP186 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and development tools for embedded control applications.

The DVA16XP186 belongs to Microchip's MPLAB ICE 2000 device adapter product line, engineered to provide precise, package-matched emulation interfaces for legacy PICmicro families during firmware debug and validation.

FAQ

What is the primary function of the DVA16XP186 in the MPLAB ICE 2000 system?

The DVA16XP186 serves as a dedicated device adapter that bridges the MPLAB ICE 2000 emulator pod to 18-pin DIP target boards. It provides signal routing, oscillator emulation (including TIMER1 32–40 kHz input), and mechanical switch configuration for pins RB1, RB2, RB3, RC5, OSC1, OSC2, and T0CKI - enabling accurate, low-risk in-circuit debugging of PIC16F716 and related devices. The DVA16XP186 ensures electrical and timing fidelity during emulation without requiring target board modification.

Which processor module is required for use with DVA16XP186?

The DVA16XP186 is explicitly designed for use with the PCM16YJ0 processor module, as confirmed in Section 5.7 of DS51140M. This pairing enables full support for freeze mode, external clock sourcing, and TIMER1 oscillator functionality. Using any other processor module - such as PCM16XA0 or PCM16XE1 - may result in incomplete signal routing, missing oscillator features, or failure to recognize configured switch positions. The DVA16XP186 relies on PCM16YJ0's specific I/O mapping and control logic.

Does DVA16XP186 support external clock injection from the target board?

Yes, DVA16XP186 supports external clock injection via its OSC1 and OSC2 terminals, which connect directly to the target board's oscillator circuit. When used with the PCM16YJ0 processor module and configured in "External Clock" mode in MPLAB IDE, the DVA16XP186 buffers and delivers the target's clock signal to the emulator silicon while preserving load characteristics (5–10 pF). This allows cycle-accurate timing emulation without relying on the emulator pod's internal clock generator. The DVA16XP186 does not alter or condition the injected clock signal beyond buffering.

How are the mechanical switches on DVA16XP186 configured for PIC16F716 emulation?

Per Table 5-6 in DS51140M, DVA16XP186 uses four mechanical switches (S2-1, S2-2, S2-3, S1) to configure signal routing: S2-1 and S2-2 set RB1 and RB2 to connect either to the PCM16YJ0 emulator silicon (position B) or to the TIMER1 oscillator device (position A); S2-3 configures RB3 as general-purpose input (B) or CCP1 (A); and S1, combined with S2-1/S2-2, selects TIMER1 Clock Input or TIMER1 Oscillator Input. These settings ensure correct peripheral mapping for PIC16F716-specific debug scenarios. The DVA16XP186 requires no firmware or software configuration - all routing is hardware-defined by switch position.

Is DVA16XP186 compatible with modern MPLAB development environments?

DVA16XP186 is fully supported in legacy MPLAB IDE v8.x and earlier versions compatible with MPLAB ICE 2000 hardware. While it is not natively supported in current MPLAB X IDE (v6.x+) due to discontinued ICE 2000 driver stack, functional operation is maintained when using original MPLAB IDE installations on Windows XP/7 virtual machines or legacy host systems. Microchip's official documentation (DS51140M) confirms DVA16XP186's role within the ICE 2000 ecosystem, and no firmware or driver updates have been released to extend its compatibility beyond that scope. The DVA16XP186 remains a validated, production-ready component for maintaining legacy PIC16F716 development workflows.