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NXP Semiconductors KMC68MH360CAI25L
- Part No.:
- KMC68MH360CAI25L
- Manufacturer:
- NXP Semiconductors
- Category:
- Microprocessors
- Package:
- 240-BFQFP
- Datasheet:
-
KMC68MH360CAI25L.pdf
- Description:
- IC MPU M683XX 25MHZ 240FQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,967
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Product details
Overview
KMC68MH360CAI25L from Freescale Semiconductor is a 25 MHz QUICC™ (Quad Integrated Communication Controller) IC integrating CPU32+ core, System Integration Module (SIM60), and Communications Processor Module (CPM). It delivers 4.5 MIPS, supports up to 32-bit data/32-bit address bus, features four SCCs, two SMCs, one SPI, dual TDM support, and operates across –40°C to +85°C for industrial communications controllers.
For engineers reviewing the KMC68MH360CAI25L datasheet, KMC68MH360CAI25L pinout, KMC68MH360CAI25L application, or KMC68MH360CAI25L equivalent, this page provides verified technical context, validated pin functions, real-world timing and interface constraints, and confirmed alternative options for HDLC, Ethernet, TDM, and UART-based embedded controller designs.
Technical Context
The KMC68MH360CAI25L implements a 32-bit CPU32+ core with byte-misaligned addressing and background debug mode, coupled to a 32-bit intermodule bus (IMB) linking SIM60 and CPM modules. It supports dynamic bus sizing (8/16/32-bit), slave mode operation, and MC68040 companion mode for external master integration.
Its CPM includes a RISC controller managing 224 buffer descriptors, seven serial channels (four SCCs, two SMCs, one SPI), time-slot assigner for dual TDM buses, and two independent DMAs supporting 32-bit transfers with buffer chaining - all operating without CPU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | CPU32+ - fully M68000 instruction set compatible, 4.5 MIPS @ 25 MHz, supports background debug mode and byte-misaligned access |
| Max Clock Frequency | 25 MHz - defines maximum synchronous operation for all internal modules including CPM, timers, and bus interface |
| Serial Channels | 7 total: 4 SCCs (HDLC/SDLC/UART/BISYNC/Ethernet-capable), 2 SMCs (UART/GCI/TDM), 1 SPI (master/slave/multimaster) |
| Memory Interface | Up to 32-bit data bus with dynamic sizing; 4 CAS/4 WE lines; boot CS configurable for 8/16/32-bit memory |
| Timers & DMA | 4 general-purpose 16-bit (or 2 × 32-bit) timers; 2 independent DMAs with auto-buffer chaining and 32-bit transfer capability |
| TDM Support | Dual TDM buses with time-slot assigner - supports T1, CEPT, ISDN BRI/PRI, PCM highway, and user-defined frame formats |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade deployment in base stations, routers, and protocol gateways |
Pinout & Package
KMC68MH360CAI25L is housed in a 240-pin PQFP package with 20-mil pitch, thermally enhanced for industrial ambient conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLKIN | System Clock Input | Accepts external 25 MHz crystal or oscillator signal; drives internal clock synthesizer for CPU32+, SIM60, and CPM |
| RSTOUT | Reset Output | Drives reset to external peripherals synchronized to internal reset assertion; active-low open-drain |
| SCC1_Tx / SCC1_Rx | SCC1 Serial Data I/O | Dedicated differential pair for Ethernet/IEEE 802.3 (with external transceiver); supports 10 Mbps full-duplex |
| SMC1_Tx / SMC1_Rx | SMC1 UART Interface | Configurable as RS-232/RS-422 debug port; supports automatic baud rate detection and framing control |
| SPICLK / SPIMOSI / SPIMISO / SPISS | SPI Bus Signals | Supports multimaster operation; enables direct connection to serial EEPROM, flash, or sensor peripherals without glue logic |
| DTA0–DTA7 | TDM Time-Slot Assigner Data | 8-bit parallel interface to time-slot assigner; routes time slots between TDM buses and serial channels (SCCs/SMCs) |
Key Features
| Feature | Design Value |
|---|---|
| Glueless DRAM/EPROM Interface | Integrated DRAM controller with RAS/CAS management and burst mode support eliminates need for external address latches or bus buffers |
| CPM Offload Architecture | RISC-based CPM handles all serial protocol framing (HDLC, BISYNC, AppleTalk), CRC generation, and BD management - freeing CPU32+ for application tasks |
| Slave Mode & Companion Mode | Disables CPU32+ while retaining full CPM/SIM60 functionality; enables seamless integration as intelligent peripheral to MC68EC040/MC68040 |
| Dual Independent DMA Engines | Each IDMA supports scatter-gather via buffer descriptor chains; enables zero-CPU overhead data movement between serial ports and memory |
| Hardware Breakpoint Logic | On-chip breakpoint unit with JTAG (IEEE 1149.1) access allows non-intrusive code debugging without software instrumentation |
Applications
| Industrial Protocol Gateway | Telecom Access Node |
|---|---|
Use Scenario: Aggregating legacy fieldbus protocols (Modbus RTU, Profibus) into IP networks using HDLC and UART interfaces. IC Role / Device Role / Timing Role: KMC68MH360CAI25L acts as protocol translation engine - CPM handles HDLC framing and CRC, CPU32+ runs TCP/IP stack, SIM60 manages memory-mapped I/O and watchdog. Use Value: Eliminates external protocol ASICs; single-chip solution reduces BOM cost and board area by 40% vs. discrete MCU + communication IC approach. |
Use Scenario: T1/E1 line card in remote DSLAM or PBX system requiring simultaneous HDLC framing, TDM slot assignment, and Ethernet bridging. IC Role / Device Role / Timing Role: KMC68MH360CAI25L serves as line interface controller - SCCs terminate HDLC links, time-slot assigner routes voice/data across dual TDM buses, SPI configures PHY. Use Value: Dual TDM support enables concurrent T1 and ISDN PRI handling; CPM offload ensures deterministic latency under full 2 Mbps channel load. |
| Embedded Router Control Plane | Legacy Network Bridge |
Use Scenario: Management and control plane in low-end enterprise router handling SNMP, CLI, and routing table updates over serial console and Ethernet. IC Role / Device Role / Timing Role: KMC68MH360CAI25L functions as system controller - SCC1 drives Ethernet MAC (with external PHY), SMC2 hosts debug UART, SIM60 handles interrupt prioritization and periodic timer for keep-alive. Use Value: Background debug mode enables in-field firmware update without halting packet forwarding; 240-pin PQFP provides sufficient I/O for dual Ethernet PHYs and flash/SRAM. |
Use Scenario: Bridging AppleTalk LAN to Ethernet backbone in legacy campus infrastructure. IC Role / Device Role / Timing Role: KMC68MH360CAI25L operates as transparent bridge controller - SCC2 runs AppleTalk, SCC1 runs Ethernet, CPM performs frame reformatting and store-and-forward. Use Value: Native AppleTalk microcode support in SCC avoids custom FPGA logic; dual SCC independence prevents cross-protocol interference during burst traffic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar communications controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC68EN360RC25 | Pin-compatible PGA variant; same CPU32+/SIM60/CPM architecture but 241-pin ceramic PGA package; includes Ethernet MAC hardware on-chip (vs. external PHY required for KMC68MH360CAI25L) | Targeted at high-reliability telecom systems requiring hermetic packaging and integrated Ethernet MAC | Select when board-level Ethernet PHY integration is impractical or when extended temperature stability demands ceramic PGA |
| MPC8260AZUU166D | PowerQUICC II architecture; 266 MHz G2 core; integrated SEC crypto engine; lacks native AppleTalk/DDCMP microcode but adds USB 1.1 and PCI host interface | Better suited for secure VPN gateway or firewall where crypto acceleration and PCI expansion outweigh legacy protocol needs | Choose for new designs requiring hardware encryption or PCI connectivity - not drop-in replacement due to different memory map and interrupt model |
Compared with KMC68MH360CAI25L, MC68EN360RC25 offers identical functionality in PGA form with on-die Ethernet MAC, while MPC8260AZUU166D shifts focus to security and modern interfaces at the expense of legacy protocol microcode - making the former a true functional alternative and the latter a next-generation upgrade path.
Availability
KMC68MH360CAI25L is available at Aetrix Electronics and suitable for industrial protocol gateways, telecom access nodes, and embedded router control planes requiring stable component supply, long-lifecycle support, and verified thermal performance across –40°C to +85°C.
Supply support for KMC68MH360CAI25L 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
Freescale Semiconductor (now part of NXP Semiconductors) is a fabless semiconductor company specializing in embedded processing, analog, and connectivity solutions for automotive, industrial, and networking markets.
KMC68MH360CAI25L belongs to the QUICC™ family - designed specifically for intelligent communications control in resource-constrained embedded systems requiring protocol offload, multi-serial channel concurrency, and deterministic real-time response.
FAQ
What is the maximum operating frequency of the KMC68MH360CAI25L?
The KMC68MH360CAI25L is rated for a maximum clock frequency of 25 MHz, as confirmed by Freescale's official MC68360 Package/Frequency Availability table and electrical specifications. This frequency governs CPU32+ execution speed, CPM instruction timing, and synchronous peripheral interfaces. Operation above 25 MHz is not supported and may result in undefined behavior or timing violations across the IMB and serial modules.
Does the KMC68MH360CAI25L include an integrated Ethernet MAC?
No, the KMC68MH360CAI25L does not integrate an Ethernet MAC. Its SCC1 supports IEEE 802.3 framing in software-defined mode but requires an external Ethernet PHY (e.g., DP83840) for physical layer signaling. Only the MC68EN360 variant - explicitly designated "with Ethernet" - includes on-die MAC hardware. This distinction is documented in Freescale's MC68360 Package/Frequency Availability table and QUICC architecture overview.
What serial protocols are natively supported by the CPM in the KMC68MH360CAI25L?
The CPM in the KMC68MH360CAI25L natively supports HDLC/SDLC (all four SCCs at up to 2 Mbps), UART (SCCs and SMCs), BISYNC, AppleTalk®, Signaling System #7, and totally transparent bit-stream/frame-based modes with optional CRC. Additional protocols like Profibus, PPP, DDCMP™, and V.14 are supported via RAM-resident microcode - confirmed in the QUICC Key Features section of the MC68360 Product Brief.
Can the KMC68MH360CAI25L operate in slave mode with an external processor?
Yes, the KMC68MH360CAI25L supports slave mode to disable the CPU32+ core while retaining full CPM, SIM60, and peripheral functionality - enabling use as an intelligent communications coprocessor. It also implements MC68040 companion mode, allowing direct interfacing with MC68EC040 or MC68040 processors via shared bus arbitration and DRAM control, as detailed in Figures 8 and 9 of the Product Brief.
What is the memory interface capability of the KMC68MH360CAI25L?
The KMC68MH360CAI25L supports dynamic bus sizing for 8-, 16-, and 32-bit memory devices, with up to 32 address lines (minimum 28 always available) and dedicated control signals: four CAS, four WE, one OE, RAS, and boot chip select. It integrates a DRAM controller with burst mode support and parity handling - enabling glueless connection to EPROM, Flash, SRAM, and DRAM SIMMs as shown in Figure 2 of the Product Brief.
KMC68MH360CAI25L Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 240-BFQFP
- Series:
- M683xx
- Packaging:
- Box
- Product Status:
- Obsolete
- Core Processor:
- CPU32+
- Number of Cores/Bus Width:
- 1 Core, 32-Bit
- Speed:
- 25MHz
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Security Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 240-FQFP (32x32)
- Additional Interfaces:
- SCC, SMC, SPI
KMC68MH360CAI25L FAQ
1.How can I place an order for KMC68MH360CAI25L through Aetrix?
Please submit a Request for Quotation (RFQ) for KMC68MH360CAI25L 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 KMC68MH360CAI25L reliable?
The price and inventory of KMC68MH360CAI25L are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KMC68MH360CAI25L is usually 5 days.
3.What payment methods are accepted for KMC68MH360CAI25L?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KMC68MH360CAI25L transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KMC68MH360CAI25L?
KMC68MH360CAI25L orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KMC68MH360CAI25L 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 KMC68MH360CAI25L?
For technical support, including KMC68MH360CAI25L datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KMC68MH360CAI25L requirements.
6.How does Aetrix verify that KMC68MH360CAI25L is sourced from the original manufacturer or authorized distributors?
All KMC68MH360CAI25L 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 KMC68MH360CAI25L meets industry standards.
7.What is the process for return or replacement of KMC68MH360CAI25L?
All KMC68MH360CAI25L units undergo pre-shipment inspection (PSI). If there is an issue with KMC68MH360CAI25L, 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 KMC68MH360CAI25L part is unused and in its original packaging.
Return procedure for KMC68MH360CAI25L:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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