Product Overview
Motorola's 32-bit integrated processor, marked, photographed, and sold as one piece
Condition
Condition is Used, and the photographs are the specification. The top face carries the Motorola logo above three lines of marking, MC68340RP16B, then 2E16G, then CNEDU9439, with LMDUCN and JAPAN printed along the lower edge of the raised center pad. A round pin-one index dimple sits at one corner of the black package body. The underside shows a full pin grid array, three rows deep on every side around an open green center; counted across the outer row the field is fifteen pins wide. In these photographs the pins stand straight and bright, with none bent, missing, or carrying solder. Pin grid array devices that sat in sockets rather than being soldered down come out looking exactly like this, so bright tips are expected rather than a puzzle. These frames show the top face and the pin field; marks on surfaces the camera did not reach are not ruled out, and no functional test result is attached to this piece. One in stock, sold as a single processor.
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Product Overview
The MC68340 is Motorola's 32-bit integrated processor: a CPU32 core, derived from the 68020 instruction set, wrapped together with the peripherals an embedded control board would otherwise need as separate chips. Across the 683xx family that on-chip complement includes a two-channel DMA controller, two independent serial channels with their own baud rate generators, two 16-bit timer and counter units, and a system integration module handling programmable chip selects, bus arbitration, clock generation, and system protection. This particular device is marked MC68340RP16B, which places it in the 16MHz speed grade in Motorola's RP pin grid array package; the mask marking 2E16G and the factory code CNEDU9439 are printed below it, and the package is marked JAPAN. Counted from the photographs, the pin field is fifteen positions across and three rows deep on each side, which works out to the 144 pin positions the RP suffix designates. Supply voltage, timing figures, and every other electrical limit are Not confirmed - verify against the Motorola MC68340 datasheet before use.
Key Features
- Marked MC68340RP16B with the Motorola logo, mask marking 2E16G, and factory code CNEDU9439
- 32-bit CPU32 core, the 68020-derived core Motorola used across the 683xx integrated processor family
- 16MHz speed grade indicated by the 16 in the RP16B part number
- Two-channel DMA controller on the die, the feature the original listing was built around
- Two independent serial channels and two 16-bit timer and counter units in the 68340 family
- System integration module with programmable chip selects and bus arbitration
- Pin grid array package, fifteen pins per side, three rows deep, 144 positions counted in the photographs
- Package marked JAPAN; pin-one index dimple at one corner of the top face
- One piece in stock, sold as a single processor in Used condition
Applications
- A maintenance technician holding a 1990s industrial controller or motion board whose schematic calls out a 68340 by part number and nothing else will substitute
- An embedded or telecom engineer bringing a legacy board back to life that leaned on the 68340's on-chip serial channels for console and diagnostic ports
- A hardware preservation builder assembling a period-correct 683xx bench system and wanting a processor with its original markings legible
- An instructor or reverse-engineering hobbyist who wants a physical 683xx pin grid array to study and socket rather than a datasheet page
Frequently Asked Questions
What exactly is printed on the part?
Reading down from the Motorola logo: MC68340RP16B, then 2E16G, then CNEDU9439, with LMDUCN and JAPAN along the lower edge. MC68340RP16B is the orderable part number, 2E16G is the mask marking, and CNEDU9439 is a factory code. All of it is legible in the photographs at full size.
Is this a 68020 processor?
No. It is an MC68340, an integrated processor whose CPU32 core Motorola derived from the 68020 instruction set. The two are relatives, not the same chip, and a board designed for a 68020 will not accept this device. If your documentation names the 68340, this is that part; if it names the 68020, it is not.
How many pins, and what package is it?
The RP suffix is Motorola's pin grid array package. In the photographs the outer row counts fifteen pins across and the field is three rows deep on all four sides, which gives 144 pin positions. Confirm the mechanical drawing against your socket or board footprint before you commit to it.
This is a used processor - what am I actually taking on?
You are taking on a part described by its markings and its photographs rather than by a bench result. No functional test is attached to this piece, so the photographs are the specification: a clean top face with fully legible marking, and a pin field that photographs straight, bright, and free of solder. If your repair requires a device proven working under power, this is not that listing. If you are comfortable seating a candidate 68340 and finding out in your own system, this one arrives honestly described and exactly as photographed. Shipping is a flat $8, free once your order passes $28, and orders leave our Idaho warehouse the same or next business day.
Motorola put the DMA, the timers, and both serial channels on the same die so a 1990s control board could be built from one large square instead of six small ones. If your machine still speaks 68340, this is the square it has been waiting for.
