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NXP Semiconductors MC68MH360AI33L
- Part No.:
- MC68MH360AI33L
- Manufacturer:
- NXP Semiconductors
- Category:
- Microprocessors
- Package:
- 240-BFQFP
- Datasheet:
-
MC68MH360AI33L.pdf
- Description:
- IC MPU M683XX 33MHZ 240FQFP
- Quantity:
- Payment:
- Shipping:
Inventory:490
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Product details
Overview
MC68MH360AI33L from Freescale Semiconductor is a QUICC (Quad Integrated Communications Controller) microcontroller unit integrating a 33 MHz ColdFire core, CPM (Communications Processor Module), and four SCCs (Serial Communication Controllers) supporting HDLC, transparent, and ISDN T1/E1 protocols. It delivers deterministic multichannel serial I/O for telecom edge devices, with on-chip dual-ported RAM, time-slot assignment tables, and QMC (QUICC Multichannel Controller) microcode support for up to 64 logical channels.
For engineers reviewing the MC68MH360AI33L datasheet, MC68MH360AI33L pinout, MC68MH360AI33L application, or MC68MH360AI33L equivalent, key selection criteria include T1/E1 frame synchronization capability, QMC-based time-slot routing, CPM offload efficiency for HDLC/transparent traffic, and compatibility with legacy 68360 software infrastructure in industrial gateways and BRI/PRI bridge designs.
Technical Context
The MC68MH360AI33L implements a dual-core architecture: a 33 MHz ColdFire V2 CPU handles host tasks while the CPM executes communications microcode independently. Its QMC subsystem manages time-division multiplexed (TDM) data across up to 64 logical channels using programmable time-slot assignment tables (TSAT) stored in internal dual-ported RAM.
It supports synchronous serial interfaces via four SCCs configurable for HDLC, transparent, or ISDN modes, with hardware-assisted CRC generation, automatic flag detection, and channel-specific interrupt masking. The CPM handles buffer descriptor chaining, transmit/receive state machines, and global error handling (e.g., GUN/GOV FIFO underrun/overrun) without CPU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ColdFire V2 @ 33 MHz - provides real-time host control with MMU-less deterministic execution for embedded telecom firmware. |
| CPM Clock | 33 MHz - synchronizes all SCC, QMC, and DMA operations; enables full-rate T1 (1.544 Mbps) or E1 (2.048 Mbps) channel processing. |
| Logical Channels | Up to 64 - enabled by QMC microcode and TSAT tables; allows concurrent routing of multiple voice/data subchannels over shared TDM bus. |
| SCCs | 4 independent Serial Communication Controllers - each supports HDLC, transparent, or ISDN framing with dedicated parameter RAM and event registers. |
| Internal RAM | 8 KB dual-ported RAM - allocated to QMC TSAT, buffer descriptors, and SCC parameter storage; enables zero-wait-state CPM access during packet processing. |
| T1/E1 Support | Full T1 (24-channel) and E1 (32-channel) frame alignment - implemented via SICR/SIGMR register configuration and hardware frame sync detection. |
| QMC Microcode | Integrated QUICC Multichannel Controller firmware - handles time-slot mapping, subchannel routing, and MSC (Multi-Subchannel) mode without CPU overhead. |
Pinout & Package
MC68MH360AI33L is housed in a 256-pin PQFP (Plastic Quad Flat Package) with 0.65 mm pitch, compliant with JEDEC MS-026. Pin functions are organized into CPU bus (data/address/control), CPM serial interfaces (SCC0–SCC3), TDM bus signals (DTCLK, DTRX, DTX, FSC), and system control (RESET, IRQ, BR, BG).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DTCLK | TDM Data Clock Input | Accepts external 2.048 MHz (E1) or 1.544 MHz (T1) clock for synchronous TDM bus timing; drives QMC time-slot counter. |
| DTRX | TDM Receive Data | Serial input carrying time-multiplexed channel data; sampled on DTCLK rising edge; routed by QMC TSATRx table. |
| DTX | TDM Transmit Data | Serial output carrying time-multiplexed channel data; driven on DTCLK falling edge; sourced from QMC TSATTx table. |
| FSC | Frame Sync Input | Indicates start of T1/E1 frame (125 µs period); triggers QMC frame boundary detection and TSAT pointer reset. |
| SCC0_Tx | SCC0 Transmit Serial Output | HDLC/transparent serial output from SCC0; supports RS-485/RS-232 level-shifting via external transceivers. |
| SCC1_Rx | SCC1 Receive Serial Input | Asynchronous/synchronous serial input to SCC1; used for management channel or secondary ISDN S/T interface. |
Key Features
| Feature | Design Value |
|---|---|
| QMC Time-Slot Assignment | Hardware-accelerated mapping of physical TDM slots to logical channels via configurable TSAT tables - eliminates CPU polling and enables dynamic reconfiguration. |
| Multi-Subchannel (MSC) Mode | Microcode-supported subdivision of one TDM slot into up to eight 2-bit subchannels - increases logical channel density without increasing bandwidth. |
| SCC On-the-Fly Reconfiguration | Runtime switching between HDLC and transparent modes per SCC - enables hybrid protocol stacks (e.g., HDLC for signaling + transparent for payload) without reset. |
| Dual-Ported RAM Architecture | 8 KB RAM accessible simultaneously by CPU and CPM - prevents contention during high-throughput packet buffering and descriptor updates. |
| Global Error Handling | Dedicated GUN/GOV detection and restart logic in CPM - recovers from FIFO underrun/overrun events autonomously, preserving data integrity in bursty traffic. |
Applications
| ISDN BRI Bridge | T1 Channel Bank |
|---|---|
|
Use Scenario: Aggregating multiple ISDN Basic Rate Interface (BRI) lines into a single Ethernet backbone for SMB PBX systems. IC Role / Device Role / Timing Role: MC68MH360AI33L acts as the protocol translation engine, terminating S/T U-interface signaling (via SCC0/SCC1) and encapsulating voice/data into Ethernet frames (via SCC2/SCC3 + internal MAC). Use Value: Leverages QMC's 64-channel capacity to handle up to 32 simultaneous BRI calls (2B+D × 16 lines) with hardware CRC and HDLC framing - reducing host CPU load by >70% versus software-only stacks. |
Use Scenario: Central office line card converting 24 T1 channels into VoIP streams for softswitch integration. IC Role / Device Role / Timing Role: MC68MH360AI33L serves as the TDM-to-packet gateway, extracting individual DS0 channels via TSAT mapping and forwarding them to DSPs or VoIP encoders. Use Value: Uses built-in T1 frame sync (FSC) and DTCLK recovery to maintain <1 ppm timing accuracy across all 24 channels - meeting GR-474-CORE jitter requirements. |
| E1 Multiplexer | Industrial Protocol Gateway |
|
Use Scenario: Field-deployable E1 mux aggregating SCADA telemetry from remote substations onto a central monitoring network. IC Role / Device Role / Timing Role: MC68MH360AI33L operates as the E1 line interface unit, performing CAS (Channel Associated Signaling) extraction and HDLC framing for Modbus RTU tunneling. Use Value: Enables 32-channel E1 support with subchannel-level interrupt masking (INTMSK per channel) - allowing selective alarm reporting without scanning all 32 DS0s. |
Use Scenario: Converting legacy RS-485 fieldbus (e.g., Profibus DP) to IP-based control networks in factory automation. IC Role / Device Role / Timing Role: MC68MH360AI33L functions as the serial-to-Ethernet bridge controller, using SCC3 for RS-485 master polling and SCC0 for TCP/IP stack offload. Use Value: Dual-ported RAM allows concurrent buffer descriptor updates by CPM and firmware-driven packet assembly - achieving 98% line efficiency at 115.2 kbps RS-485 rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel communications controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPC860MHZQ50D4 | PowerPC 50 MHz core, integrated FEC Ethernet MAC, no ColdFire compatibility; higher CPM clock (50 MHz) but lacks QMC-specific TSAT hardware. | Preferred for new designs requiring 10/100 Mbps Ethernet bridging; less suitable for legacy 68360 code migration or strict T1/E1 timing-critical apps. | Select when Ethernet throughput >10 Mbps is required and software porting effort is acceptable. |
| MC68360RC33B | Same ColdFire core and QMC architecture, but 160-pin PGA package, no integrated TDM bus pins (DTCLK/DTRX/DTX/FSC), and reduced internal RAM (4 KB). | Suitable for cost-sensitive point-to-point serial links; cannot support full 64-channel TDM routing or hardware frame sync without external logic. | Choose only for non-TDM applications where SCC count and basic HDLC offload suffice. |
Compared with MPC860MHZQ50D4 and MC68360RC33B, the MC68MH360AI33L uniquely balances ColdFire software continuity, hardware-accelerated QMC time-slot routing, and native TDM bus interface - making it the only option among the three that meets both legacy 68360 migration needs and carrier-grade T1/E1 channel bank timing requirements.
Availability
MC68MH360AI33L is available at Aetrix Electronics and suitable for ISDN BRI bridges, T1 channel banks, and industrial protocol gateways requiring stable component supply, long-term lifecycle support, and traceable sourcing for telecom infrastructure deployments.
Supply support for MC68MH360AI33L 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) was a leading designer of embedded processors and communications ICs, specializing in automotive, industrial, and networking solutions before its 2015 acquisition.
The MC68MH360AI33L belongs to Freescale's QUICC family - engineered specifically for deterministic, low-latency serial communications in telecom access equipment, where CPM offload and TDM channel agility were critical design objectives.
FAQ
What is the primary function of the QMC in the MC68MH360AI33L?
The QMC (QUICC Multichannel Controller) in the MC68MH360AI33L is a dedicated CPM microcode subsystem that performs hardware-accelerated time-slot assignment and logical channel routing across T1/E1 TDM buses. It uses programmable TSAT tables stored in dual-ported RAM to map physical time slots to up to 64 logical channels, enabling concurrent HDLC or transparent traffic without CPU intervention. This functionality is integral to the MC68MH360AI33L's role in ISDN and channel bank applications.
Does the MC68MH360AI33L support both T1 and E1 framing standards?
Yes, the MC68MH360AI33L natively supports both T1 (1.544 Mbps, 24-channel) and E1 (2.048 Mbps, 32-channel) framing through configurable SICR and SIGMR registers, along with hardware frame sync (FSC) detection and DTCLK input handling. Its QMC subsystem validates frame boundaries and aligns TSAT pointers accordingly - a capability confirmed in the MC68MH360AI33L QMC Supplement documentation and verified in T1/E1 initialization examples (Section 6.2).
How does the MC68MH360AI33L differ from the base MC68360 in terms of communications features?
The MC68MH360AI33L extends the MC68360 with enhanced QMC microcode, larger internal dual-ported RAM (8 KB vs. 4 KB), and added TDM bus interface pins (DTCLK, DTRX, DTX, FSC). It also introduces Multi-Subchannel (MSC) mode for finer-grained time-slot partitioning and deletes certain legacy features like the internal timer-based DMA controller. These changes make the MC68MH360AI33L more suitable for dense TDM applications than the original MC68360.
Can the MC68MH360AI33L operate without external memory?
Yes, the MC68MH360AI33L can execute standalone applications using its on-chip 8 KB dual-ported RAM for CPM parameter storage, QMC TSAT tables, and buffer descriptors. However, for full-featured operation - especially with large Ethernet stacks or multi-protocol firmware - external SRAM or Flash is typically required for code storage and extended packet buffers. The MC68MH360AI33L's address bus and wait-state controls are designed to interface seamlessly with standard 16-bit or 32-bit external memory.
What debugging resources are available for the MC68MH360AI33L's QMC subsystem?
The MC68MH360AI33L provides dedicated QMC debugging aids including pointer register visibility (TSATRx/TSATTx, MCBASE), real-time state registers (TSTATE/RSTATE per channel), and global exception flags (GUN/GOV) accessible via CPM memory-mapped registers. The QMC Supplement document (Section 6.6) details step-by-step validation procedures using these registers to verify time-slot mapping, buffer descriptor chains, and interrupt flow - all directly applicable to the MC68MH360AI33L silicon revision.
MC68MH360AI33L Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 240-BFQFP
- 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:
- Surface Mount
- Supplier Device Package:
- 240-FQFP (32x32)
- Additional Interfaces:
- SCC, SMC, SPI
MC68MH360AI33L FAQ
1.How can I place an order for MC68MH360AI33L through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68MH360AI33L 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 MC68MH360AI33L reliable?
The price and inventory of MC68MH360AI33L are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68MH360AI33L is usually 5 days.
3.What payment methods are accepted for MC68MH360AI33L?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC68MH360AI33L transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC68MH360AI33L?
MC68MH360AI33L orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC68MH360AI33L 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 MC68MH360AI33L?
For technical support, including MC68MH360AI33L datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68MH360AI33L requirements.
6.How does Aetrix verify that MC68MH360AI33L is sourced from the original manufacturer or authorized distributors?
All MC68MH360AI33L 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 MC68MH360AI33L meets industry standards.
7.What is the process for return or replacement of MC68MH360AI33L?
All MC68MH360AI33L units undergo pre-shipment inspection (PSI). If there is an issue with MC68MH360AI33L, 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 MC68MH360AI33L part is unused and in its original packaging.
Return procedure for MC68MH360AI33L:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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