Microchip Technology DVA12XP080

Overview

DVA12XP080 from Microchip Technology Inc. is a device adapter for the MPLAB ICE 2000 in-circuit emulator system, designed specifically for 8-pin DIP PIC12C50X microcontrollers. It provides target interface connectivity, on-board oscillator circuitry for accurate clock emulation, and mechanical switch-based signal routing for GP2–GP5, MCLR, OSC1/OSC2, and T0CKI. It supports EEPROM emulation via integrated 24C00 connected to RA0/RA1 when used with PCM16XA0 processor module.

For engineers reviewing the DVA12XP080 datasheet, DVA12XP080 pinout, DVA12XP080 application, or DVA12XP080 equivalent, this adapter enables precise PIC12C50X family emulation with configurable I/O routing, internal oscillator support, and low-voltage (2.0–5.5 V) compatibility - critical for firmware development, oscillator validation, and EEPROM functional testing during embedded design.

Technical Context

The DVA12XP080 interfaces between the PCM16XA0 processor module and 8-pin DIP PIC12C50X targets, using four mechanical DIP switches (S1–S4) to route RB2–RB5, MCLR, OSC1/OSC2, and T0CKI signals either to the emulator silicon or the on-board oscillator chip. Its oscillator circuit emulates HS, XT, LP, and RC modes with 5–10 pF load on OSC1/OSC2 pins.

It integrates a 24C00 EEPROM (U1) wired to RA0/RA1 of the PCM16XA0 to enable EEPROM read/write functionality for PIC12CE51X devices. Target power draw is ≤10 mA even when emulator power supplies the processor module, due to active components on the adapter requiring target VCC.

Key Specifications

Availability

DVA12XP080 is available at Aetrix Electronics and suitable for PIC12C50X firmware development, oscillator characterization, and EEPROM functional validation requiring stable component supply across industrial prototyping, academic lab environments, and small-batch embedded design programs.

Supply support for DVA12XP080 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 manufacturer specializing in microcontrollers, analog devices, and development tools for embedded systems.

The DVA12XP080 belongs to Microchip's MPLAB ICE 2000 device adapter product line, engineered to provide low-risk, pin-accurate emulation interfaces for legacy PICmicro families during firmware debug and hardware validation.

FAQ

What is the primary function of the DVA12XP080 in the MPLAB ICE 2000 system?

The DVA12XP080 serves as a dedicated device adapter that bridges the PCM16XA0 processor module to 8-pin DIP PIC12C50X microcontrollers. It provides physical interface compatibility, configurable signal routing via mechanical switches, on-board oscillator emulation, and 24C00 EEPROM support for PIC12CE51X devices. The DVA12XP080 ensures accurate timing, I/O behavior, and non-volatile memory simulation during in-circuit debugging.

Which processor module is required for use with the DVA12XP080?

The DVA12XP080 is explicitly designed for use with the PCM16XA0 processor module, as confirmed in Section 5.1 of DS51140M. This pairing enables full signal routing (RB2–RB5, MCLR, OSC1/OSC2, T0CKI), EEPROM emulation via RA0/RA1, and correct voltage-level translation for PIC12C50X family devices. Using any other processor module may result in incorrect pin mapping or missing functionality.

How do the mechanical switches on the DVA12XP080 affect signal routing?

The DVA12XP080 features four mechanical DIP switches (S1–S4) that determine whether target pins GP2–GP5 (mapped to RB2–RB5), MCLR, OSC1/OSC2, or T0CKI connect to the PCM16XA0 emulator silicon or the on-board oscillator chip. For example, setting S1 to OSC1 and S2 to OSC2 routes crystal inputs to the oscillator circuit, while setting S4 to T0CKI directs timer input to the emulator. These switches eliminate need for soldering changes during test configuration.

Does the DVA12XP080 support external clock sources from the target board?

Yes - the DVA12XP080 supports external clock sourcing via its OSC1 and OSC2 terminals, which are loaded with 5–10 pF capacitance to match PIC12C50X oscillator requirements. When configured for external clock mode in MPLAB IDE, the on-board oscillator chip is bypassed, and the target's crystal or RC network drives the PCM16XA0. This allows validation of actual oscillator startup, stability, and frequency accuracy under real board conditions.

Can the DVA12XP080 be used with PIC12C67X devices?

No - the DVA12XP080 is specified exclusively for PIC12C50X 8-pin DIP devices. PIC12C67X devices require the DVA12XP081 adapter (Section 5.2), which uses different switch logic and lacks the 24C00 EEPROM interface. Attempting to use DVA12XP080 with PIC12C67X will result in incorrect pin assignments, missing EEPROM support, and potential signal contention due to mismatched oscillator routing.