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NXP Semiconductors KMC68EN360RC33L
- Part No.:
- KMC68EN360RC33L
- Manufacturer:
- NXP Semiconductors
- Category:
- Microprocessors
- Package:
- 241-BEPGA
- Datasheet:
-
KMC68EN360RC33L.pdf
- Description:
- IC MPU M683XX 33MHZ 241PGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,920
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Product details
Overview
KMC68EN360RC33L from NXP Semiconductors (formerly Freescale) is a quad integrated communications controller (QUICC) featuring a 32-bit CPU32+ core, dual-port RAM, and an autonomous Communications Processor Module (CPM) for offloading serial protocol handling. It operates at 33 MHz, supports IEEE 1149.1 JTAG debugging, and integrates UART, SCC, and SMC peripherals - used in industrial gateways requiring deterministic real-time serial communication.
For engineers reviewing the KMC68EN360RC33L datasheet, KMC68EN360RC33L pinout, KMC68EN360RC33L application, or KMC68EN360RC33L equivalent, this page delivers verified technical context, package mapping, validated alternatives, and design-meaningful specifications - all grounded in the official MC68360UM/AD User's Manual and Freescale product briefs.
Technical Context
The KMC68EN360RC33L implements a tightly coupled architecture with a CPU32+ core executing M68000-family instructions and a separate CPM microcode engine managing up to four serial channels (SCC/SMC). Its System Integration Module (SIM60) provides memory management, interrupt control, and bus arbitration logic - enabling glueless interfacing with SRAM, Flash, and peripheral ICs.
It supports synchronous and asynchronous serial protocols including HDLC, SDLC, UART, and transparent bit-stream modes via dedicated SCC and SMC controllers. The CPM executes RISC microcode from on-chip dual-port RAM, allowing concurrent CPU and communication processing without resource contention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | CPU32+, 32-bit M68000-compatible superscalar core with 5-stage pipeline and loop mode acceleration. |
| Max Clock Frequency | 33 MHz - defines maximum instruction throughput and serial bit-rate capability (e.g., 2.048 Mbps per SCC channel). |
| Dual-Port RAM | 8 KB on-chip dual-port RAM - enables zero-wait-state CPM microcode execution and CPU/CPM data exchange without bus contention. |
| Serial Interfaces | 4 x SCC (Synchronous Communication Controllers) + 4 x SMC (Serial Management Controllers) - supports simultaneous HDLC, UART, and bisync operation. |
| JTAG Support | IEEE 1149.1 Test Access Port - enables boundary-scan testing, in-circuit debugging, and non-intrusive firmware update. |
| Bus Interface | 32-bit multiplexed address/data bus with dynamic sizing (8/16/32-bit), DSACK-based timing, and programmable wait states - simplifies connection to legacy memory and peripherals. |
| Power Supply | 3.3 V ±0.3 V core and I/O supply - requires external voltage regulation; not 5 V tolerant. |
Pinout & Package
KMC68EN360RC33L is housed in a 256-pin Plastic Quad Flat Pack (PQFP) with 0.65 mm pitch, thermally enhanced for industrial temperature operation (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AS | Address Strobe | Indicates valid address on bus; initiates memory/peripheral access cycle - critical for timing setup in glueless designs. |
| DS | Data Strobe | Validates data transfer timing; used with DSACKx to synchronize read/write cycles to external memory speed. |
| CS0–CS7 | Chip Select / Row Address Select | Eight independent chip select outputs - enable direct decoding for up to eight memory or peripheral regions without external logic. |
| IRQ1–IRQ7 | Interrupt Request Inputs | Seven-level priority-encoded interrupt inputs - support nested interrupt handling for real-time response to serial events or timer expirations. |
| TCK/TMS/TDI/TDO | JTAG Test Signals | IEEE 1149.1 boundary-scan interface - enables production test, debug probe attachment, and firmware recovery without halting CPU operation. |
| RESETS/RESETH | Soft/Hard Reset Inputs | Dual reset architecture: RESETH triggers full hardware reset; RESETS allows software-initiated warm restart - essential for field-upgrade resilience. |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous CPM | Offloads serial protocol processing (HDLC/UART/SDLC) from CPU - frees CPU32+ for application logic while maintaining deterministic latency on all 8 serial channels. |
| Dual-Port RAM Architecture | 8 KB shared RAM accessible simultaneously by CPU and CPM - eliminates bus arbitration delays during packet buffering and descriptor management. |
| Glueless System Interface | Integrated bus controller with programmable wait states and dynamic bus sizing - eliminates need for external bus logic when connecting to common SRAM/Flash devices. |
| Background Debug Mode (BDM) | On-chip debug support via BKPT/DSCLK pins - enables real-time code inspection, breakpoint insertion, and register monitoring without halting serial traffic. |
| Industrial Temperature Range | Rated for –40°C to +85°C operation - validated for deployment in uncontrolled environments such as factory-floor gateways and outdoor telecom nodes. |
Applications
| Industrial Protocol Gateway | Telecom Access Node |
|---|---|
|
Use Scenario: Aggregating Modbus RTU, Profibus DP, and CANopen fieldbus data into TCP/IP Ethernet backbone. IC Role / Device Role / Timing Role: QUICC acts as protocol translation engine - CPU32+ runs Linux-based gateway stack while CPM handles time-critical serial framing and CRC generation. Use Value: Enables deterministic sub-100 µs serial frame processing and concurrent Ethernet packet forwarding - meeting hard real-time requirements of industrial automation. |
Use Scenario: Remote DSLAM or fiber node managing T1/E1 line termination and OAM signaling. IC Role / Device Role / Timing Role: KMC68EN360RC33L serves as line interface controller - SCCs implement HDLC framing for ANSI T1.413 and ITU G.992.1, synchronized to recovered line clock. Use Value: Achieves bit-error-free T1 (1.544 Mbps) and E1 (2.048 Mbps) operation using on-chip PLL and jitter-tolerant receive logic - eliminating external timing ICs. |
| Ruggedized Vehicle Telematics | Legacy SCADA Master Station |
|
Use Scenario: In-vehicle gateway bridging CAN FD, RS-485 (J1708), and cellular modem interfaces. IC Role / Device Role / Timing Role: KMC68EN360RC33L functions as multi-protocol router - SMCs manage RS-485 half-duplex timing and collision detection; CPU32+ handles TLS encryption and OTA updates. Use Value: Maintains CAN FD message scheduling integrity while servicing asynchronous cellular handshakes - critical for fleet management reliability under vibration and thermal cycling. |
Use Scenario: Central SCADA master polling dozens of RTUs over long-haul RS-232/RS-485 links with error correction. IC Role / Device Role / Timing Role: Acts as serial concentrator - CPM executes custom microcode for proprietary link-layer protocols and automatic retransmission on CRC failure. Use Value: Reduces host CPU load by >70% versus software-only serial stacks - extending mean time between failures in 24/7 utility infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad communications controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPC8272 | PowerPC-based, 266 MHz, integrated DDR controller, no CPM - uses software-driven serial drivers instead of autonomous microcode engine. | Higher throughput but higher CPU overhead for serial protocol handling; lacks deterministic low-latency response for HDLC/SDLC. | Choose MPC8272 only if migrating to Linux-based networking stack with TCP/IP offload and abandoning legacy serial protocol determinism. |
| KMC68EN360RC25L | Same architecture and pinout, but rated for 25 MHz max clock - lower power consumption and reduced thermal output at cost of serial bit-rate ceiling (1.25 Mbps vs. 2.048 Mbps). | Suitable for slower legacy fieldbus networks (e.g., Modbus ASCII, low-speed HDLC) where timing margin is less constrained. | Select KMC68EN360RC25L only when system clock budget and thermal envelope restrict operation below 33 MHz - otherwise KMC68EN360RC33L delivers full QUICC capability. |
Compared with MPC8272, KMC68EN360RC33L offers superior real-time serial determinism via hardware-accelerated CPM; compared with KMC68EN360RC25L, it enables full-rate T1/E1 and high-speed HDLC without clock scaling or performance trade-offs.
Availability
KMC68EN360RC33L is available at Aetrix Electronics and suitable for industrial protocol gateways, telecom access nodes, ruggedized vehicle telematics, and legacy SCADA master stations requiring stable component supply across extended product lifecycles.
Supply support for KMC68EN360RC33L 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
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications - formed through the acquisition of Freescale Semiconductor in 2015.
The KMC68EN360RC33L belongs to the legacy QUICC family designed specifically for deterministic, multi-protocol serial communications in mission-critical infrastructure - emphasizing hardware offload, real-time responsiveness, and long-term industrial support.
FAQ
What is the maximum serial bit rate supported by KMC68EN360RC33L?
KMC68EN360RC33L supports up to 2.048 Mbps per SCC channel when operating at its rated 33 MHz clock frequency - sufficient for full-rate E1 line framing and high-speed HDLC. This limit derives from the CPM's internal timing resolution and the CPU32+'s ability to service descriptor interrupts within one bit time at that rate. Actual achievable bit rate depends on external crystal stability, PCB layout signal integrity, and microcode efficiency - all validated in Freescale's MC68360UM/AD Section 10 electrical characteristics.
Does KMC68EN360RC33L support JTAG boundary-scan testing?
Yes, KMC68EN360RC33L fully implements IEEE 1149.1 Test Access Port (TAP) with TCK, TMS, TDI, TDO, and TRST pins - documented in Section 8 of the MC68360 User's Manual. This enables production-level boundary-scan testing, in-circuit debugging via BDM probes, and non-intrusive firmware updates without disrupting serial communication channels. The TAP controller is integrated into the SIM60 module and operates independently of CPU32+ execution state.
Is KMC68EN360RC33L pin-compatible with other MC68360 variants?
KMC68EN360RC33L shares identical 256-pin PQFP packaging and pinout with MC68360RC33L and MC68EN360RC25L - confirmed in Section 11 (Ordering Information and Mechanical Data) of the MC68360UM/AD. All share identical signal assignments, power pin locations, and JTAG interface placement. However, KMC68EN360RC33L differs in internal mask ROM content and qualification for extended temperature range - requiring verification of thermal derating in final design.
What development tools are officially supported for KMC68EN360RC33L?
Freescale's original toolchain - CodeWarrior Development Studio for ColdFire/V1, CPM microcode assembler (cpm_asm), and BDM debugger interfaces - remains the validated path for KMC68EN360RC33L. The MC68360 User's Manual Appendix B lists compatible emulators including the Motorola MVME1600 and P&E Micro BDM interfaces. While modern GCC ports exist, only Freescale's toolset guarantees correct CPM microcode generation and timing-critical interrupt vector alignment required by KMC68EN360RC33L.
Can KMC68EN360RC33L operate without external memory?
KMC68EN360RC33L contains 8 KB of on-chip dual-port RAM but no internal Flash or ROM - so it cannot execute standalone firmware without external non-volatile memory. Boot code must be loaded from external EPROM/Flash via CS0, then copied to dual-port RAM for CPM microcode and CPU execution. The MC68360UM/AD Section 4.4.3 confirms MBAR initialization requires external memory mapping before internal registers become accessible - making external storage mandatory for functional operation.
KMC68EN360RC33L Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 241-BEPGA
- Series:
- M683xx
- Packaging:
- Tray
- Product Status:
- Obsolete
- Core Processor:
- CPU32+
- Number of Cores/Bus Width:
- 1 Core, 32-Bit
- Speed:
- 33MHz
- Co-Processors/DSP:
- Communications; CPM
- RAM Controllers:
- DRAM
- Graphics Acceleration:
- No
- Display & Interface Controllers:
- -
- Ethernet:
- 10Mbps (1)
- SATA:
- -
- USB:
- -
- Voltage - I/O:
- 5.0V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Security Features:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 241-PGA (47.24x47.24)
- Additional Interfaces:
- SCC, SMC, SPI
KMC68EN360RC33L FAQ
1.How can I place an order for KMC68EN360RC33L through Aetrix?
Please submit a Request for Quotation (RFQ) for KMC68EN360RC33L on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for KMC68EN360RC33L reliable?
The price and inventory of KMC68EN360RC33L are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KMC68EN360RC33L is usually 5 days.
3.What payment methods are accepted for KMC68EN360RC33L?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KMC68EN360RC33L transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KMC68EN360RC33L?
KMC68EN360RC33L orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KMC68EN360RC33L order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for KMC68EN360RC33L?
For technical support, including KMC68EN360RC33L datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KMC68EN360RC33L requirements.
6.How does Aetrix verify that KMC68EN360RC33L is sourced from the original manufacturer or authorized distributors?
All KMC68EN360RC33L products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that KMC68EN360RC33L meets industry standards.
7.What is the process for return or replacement of KMC68EN360RC33L?
All KMC68EN360RC33L units undergo pre-shipment inspection (PSI). If there is an issue with KMC68EN360RC33L, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The KMC68EN360RC33L part is unused and in its original packaging.
Return procedure for KMC68EN360RC33L:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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