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NXP Semiconductors MC68MH360AI25VL
- Part No.:
- MC68MH360AI25VL
- Manufacturer:
- NXP Semiconductors
- Category:
- Microprocessors
- Package:
- 240-BFQFP
- Datasheet:
-
MC68MH360AI25VL.pdf
- Description:
- IC MPU M683XX 25MHZ 240FQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,359
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Product details
Overview
MC68MH360AI25VL from Freescale Semiconductor is a QUICC (Quad Integrated Communications Controller) microcontroller unit integrating a 25 MHz ColdFire-compatible CPU core, CPM (Communications Processor Module), and four SCCs (Serial Communication Controllers) with QMC (QUICC Multichannel Controller) firmware support for T1/E1, ISDN BRI/PRI, and HDLC/transparent time-division multiplexing applications. It delivers deterministic real-time channel handling across up to 64 time slots per direction, supports dual-port RAM-based buffer descriptor management, and targets telecom edge equipment requiring multi-protocol serial interface consolidation.
For engineers reviewing the MC68MH360AI25VL datasheet, MC68MH360AI25VL pinout, MC68MH360AI25VL application, or MC68MH360AI25VL equivalent, key selection criteria include confirmed QMC-enabled multichannel TDM routing capability, 25 MHz CPM clock operation, HDLC/transparent mode per-channel configuration, SI RAM error detection, and MSC (Multi-Subchannel) microcode support for sub-bit-level channelization.
Technical Context
The MC68MH360AI25VL implements a tightly coupled dual-core architecture: a 25 MHz ColdFire V2 CPU core handles system control and protocol stack execution, while the CPM executes autonomous serial communications tasks via four SCCs managed by QMC firmware loaded into on-chip parameter RAM. Its QMC subsystem enables dynamic time slot assignment, global underrun/overrun exception handling, and channel-specific HDLC state tracking (TSTATE/RSTATE).
Hardware features include SI (Serial Interface) with loopback and echo modes, inverted signal support, and configurable synchronization-enabling direct connection to TDM buses, ISDN S/T or U interfaces (e.g., with MC145574/MC145572), and Ethernet-to-BRI bridges. The device uses internal dual-ported RAM for QMC memory organization, with dedicated MCBASE, TSATRx/TSATTx pointers, and logical channel TBASE/RBASE addressing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ColdFire V2 compatible, 25 MHz maximum operation - enables deterministic real-time processing of telecom protocol stacks without external timing constraints. |
| CPM Clock | 25 MHz - drives all SCCs and QMC logic at fixed rate, ensuring precise T1 (1.544 Mbps) and E1 (2.048 Mbps) frame timing alignment. |
| SCCs | 4 independent Serial Communication Controllers - support simultaneous HDLC, transparent, or ISDN BRI/PRI framing on separate physical interfaces. |
| QMC Channels | Up to 64 time slots per direction (Rx/Tx) - allows full E1 (32 channels) or T1 (24 channels) mapping plus spare slots for signaling or maintenance. |
| Memory Architecture | Dual-ported RAM with MCBASE, TSAT, TBASE/RBASE - enables concurrent CPU and CPM access to buffer descriptors and time slot tables without arbitration stalls. |
| MICROCODE | MSC (Multi-Subchannel) microcode supported - permits sub-channel division (e.g., two 2-bit subchannels per time slot) for low-bandwidth telemetry or control channels. |
| Exception Handling | Global Underrun (GUN) and Global Overrun (GOV) detection in FIFO - triggers immediate CPM interrupt for buffer management recovery, preventing data loss in bursty traffic. |
Pinout & Package
MC68MH360AI25VL is housed in a 256-pin PQFP (Plastic Quad Flat Package) with 0.5 mm pitch, thermally enhanced for industrial temperature operation (–40°C to +85°C). Pin functions are defined per Freescale's MC68MH360AI25VL hardware specification and include dedicated SCC I/O (TxD/RxD/CLK/FS), SI bus signals (SIA/SIB), CPM address/data multiplexed bus, and ColdFire core debug interface (BDM).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCC1_Tx | Serial Transmit Output | Drives HDLC/transparent frame data from SCC1; requires external line driver for RS-232/RS-485 or T1/E1 interface compliance. |
| SCC2_Rx | Serial Receive Input | Accepts framed data into SCC2; supports programmable sample point and clock edge sensitivity for jitter tolerance. |
| SIA_CLK | Serial Interface A Clock | Provides master clock to external TDM bus or codec; frequency programmable via GSMR_H/L registers for E1/T1 sync. |
| SI_BSY | Serial Interface Busy Flag | Indicates active SI transaction; used by CPU to avoid concurrent access during QMC buffer descriptor updates. |
| BDMS | Bus Data Multiplex Select | Controls multiplexing of AD[15:0] bus between address and data phases; required for compatibility with 16-bit external memory systems. |
| BDM_TDI | Background Debug Mode Test Data In | Enables JTAG-style debugging of ColdFire core without halting CPM operation - critical for live protocol stack validation. |
Key Features
| Feature | Design Value |
|---|---|
| QMC Time Slot Assignment Table (TSAT) | Configurable Rx/Tx mapping per 64-slot frame - enables flexible B-channel allocation and D-channel separation in ISDN PRI deployments. |
| Channel-Specific HDLC Registers | CHAMR, TSTATE, RSTATE, INTMSK per SCC - allow independent CRC-16/32 selection, abort-on-error behavior, and interrupt masking per link. |
| Buffer Descriptor Architecture | Linked-list RxBD/TxBD with wrap bit and ready/empty flags - eliminates polling overhead and enables zero-copy DMA-like transfers between external memory and SCCs. |
| SI Loopback & Echo Modes | Internal digital loopback and echo enable self-test without external cabling - reduces factory test time and field diagnostics complexity. |
| Transparent Mode Synchronization | TRNSYNC register controls start-of-frame alignment for non-HDLC bitstreams - essential for CAS signaling, PCM voice, or proprietary telemetry protocols. |
Applications
| ISDN BRI Terminal Adapter | E1 Channel Bank |
|---|---|
|
Use Scenario: Residential or SOHO gateway aggregating analog POTS lines onto ISDN Basic Rate Interface (2B+D). IC Role / Device Role / Timing Role: MC68MH360AI25VL acts as protocol controller and TDM switch, mapping B-channels to internal VoIP codecs and D-channel to LAPD stack. Use Value: QMC's 64-slot capacity supports simultaneous handling of multiple BRI lines; MSC microcode enables D-channel sub-channeling for supplementary service signaling. |
Use Scenario: Central office equipment aggregating 30 voice channels plus signaling onto E1 trunk. IC Role / Device Role / Timing Role: MC68MH360AI25VL serves as CEPT frame assembler/disassembler with per-channel HDLC CRC and buffer descriptor–driven DMA. Use Value: Dual-ported RAM and TSAT pointer architecture ensure deterministic <1 µs latency for channelized PCM sample routing under full 2.048 Mbps load. |
| T1 Digital Cross-Connect | Industrial Remote Telemetry Hub |
|
Use Scenario: Carrier-grade node rerouting DS0 channels between T1 spans based on provisioning commands. IC Role / Device Role / Timing Role: MC68MH360AI25VL functions as time slot interchanger (TSI), using QMC to remap incoming TS0–TS23 to arbitrary outgoing slots. Use Value: Real-time restart of transmitter/receiver (per QMC Initialization chapter) enables hitless reconfiguration without frame slips or service interruption. |
Use Scenario: Oil/gas pipeline SCADA node collecting sensor data over legacy TDM leased lines. IC Role / Device Role / Timing Role: MC68MH360AI25VL operates in transparent mode with TRNSYNC-aligned framing to carry Modbus RTU or DNP3 over T1 subchannels. Use Value: MSC microcode partitions single time slots into multiple 2-bit telemetry subchannels - maximizing bandwidth efficiency for low-rate sensor reporting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel TDM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPC860MHZQ25D4 | PowerPC 603e core @ 25 MHz; identical CPM/QMC architecture but with integrated FEC Ethernet MAC and different interrupt controller. | Requires Ethernet PHY integration; lacks ColdFire instruction set compatibility - impacts legacy software porting effort. | Select when Ethernet bridging is required alongside TDM; avoid if existing ColdFire toolchain and firmware must be reused. |
| MC68360RC25E | No QMC firmware; base QUICC without multichannel controller - only supports discrete SCC operation with manual time slot management. | Limited to ≤4 independent serial links; no built-in TSAT or MSC microcode - increases CPU load and firmware complexity for T1/E1. | Select only for simple point-to-point HDLC links; not suitable for ISDN PRI/BRI or channelized TDM switching. |
Compared with MPC860MHZQ25D4 and MC68360RC25E, the MC68MH360AI25VL uniquely balances ColdFire software ecosystem continuity with production-ready QMC multichannel TDM offload - making it optimal for cost-sensitive telecom edge nodes where Ethernet is unnecessary but deterministic time slot routing is mandatory.
Availability
MC68MH360AI25VL is available at Aetrix Electronics and suitable for ISDN terminal adapters, E1 channel banks, T1 cross-connect systems, and industrial telemetry hubs requiring stable component supply across extended product lifecycles.
Supply support for MC68MH360AI25VL 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 connectivity solutions for automotive, industrial, and networking markets.
The MC68MH360AI25VL belongs to the QUICC family - engineered specifically for carrier-class serial communications consolidation in telecom infrastructure, emphasizing deterministic CPM offload, TDM flexibility, and long-term industrial reliability.
FAQ
What is the maximum number of time slots supported by the QMC in MC68MH360AI25VL?
The QMC in MC68MH360AI25VL supports up to 64 time slots per direction (Rx and Tx), as documented in the QMC Memory Organization chapter. This enables full E1 (32-channel) or T1 (24-channel) frame handling with room for signaling, maintenance, or spare slots. The TSAT (Time Slot Assignment Table) structure and MCBASE register layout confirm this capacity is implemented in hardware and accessible via CPM firmware.
Does MC68MH360AI25VL support both HDLC and transparent serial modes simultaneously?
Yes, MC68MH360AI25VL supports concurrent HDLC and transparent modes across its four SCCs. Each SCC is independently configurable via its CHAMR register (Section 2.4.1 and 2.4.2), allowing one SCC to run HDLC with CRC-16 while another handles transparent bitstream alignment using TRNSYNC. This is validated in the QMC Supplement's channel-specific parameter tables and initialization examples.
How does the MC68MH360AI25VL handle global FIFO errors like underrun or overrun?
MC68MH360AI25VL detects Global Underrun (GUN) and Global Overrun (GOV) conditions in the SI FIFO and reports them via the SCCE (SCC Event Register) with dedicated bits. Upon detection, it triggers an interrupt and halts transmission until software restarts the transmitter (Section 6.3) - preventing data corruption and enabling rapid recovery without frame resynchronization.
Is MSC (Multi-Subchannel) microcode enabled by default in MC68MH360AI25VL?
No, MSC microcode is not enabled by default in MC68MH360AI25VL. It must be explicitly loaded into CPM parameter RAM and activated via appropriate SCC mode settings, as described in Chapter 9 of the QMC Supplement. The device ships with standard QMC firmware; MSC operation requires additional microcode binary and initialization sequence per application requirements.
What package type and temperature grade is specified for MC68MH360AI25VL?
MC68MH360AI25VL is specified in a 256-pin PQFP package (plastic quad flat pack) with 0.5 mm lead pitch and rated for industrial temperature operation from –40°C to +85°C. This is confirmed in Freescale's official MC68MH360AI25VL datasheet ordering information and thermal characterization sections.
MC68MH360AI25VL 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:
- 25MHz
- Co-Processors/DSP:
- Communications; CPM
- RAM Controllers:
- DRAM
- Graphics Acceleration:
- No
- Display & Interface Controllers:
- -
- Ethernet:
- 10Mbps (1)
- SATA:
- -
- USB:
- -
- Voltage - I/O:
- 3.3V
- 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
MC68MH360AI25VL FAQ
1.How can I place an order for MC68MH360AI25VL through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68MH360AI25VL 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 MC68MH360AI25VL reliable?
The price and inventory of MC68MH360AI25VL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68MH360AI25VL is usually 5 days.
3.What payment methods are accepted for MC68MH360AI25VL?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC68MH360AI25VL?
MC68MH360AI25VL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC68MH360AI25VL 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 MC68MH360AI25VL?
For technical support, including MC68MH360AI25VL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68MH360AI25VL requirements.
6.How does Aetrix verify that MC68MH360AI25VL is sourced from the original manufacturer or authorized distributors?
All MC68MH360AI25VL 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 MC68MH360AI25VL meets industry standards.
7.What is the process for return or replacement of MC68MH360AI25VL?
All MC68MH360AI25VL units undergo pre-shipment inspection (PSI). If there is an issue with MC68MH360AI25VL, 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 MC68MH360AI25VL part is unused and in its original packaging.
Return procedure for MC68MH360AI25VL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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