MC68302AG16C - 16MHz M68000 Integrated Comm Processor | NXP
MPN: MC68302AG16C ✗ Akhir HidupMC68302AG16C Ringkasan
An integrated communications processor (ICP / multi-channel comm controller) is a system-on-chip variant of a microprocessor that adds dedicated serial-channel hardware, DMA, and timers alongside the CPU. It sits in the taxonomy as MPU -> communications processor -> networking SoC -> embedded processor, allowing designers to replace separate UART, DMA, and CPU chips with one device. The MC68302 was the first NXP (then Motorola) device to closely couple an industry-standard MC68000/MC68008 core with a flexible communications architecture, becoming a foundational part for ISDN, modem, router, and X.25 designs.
Key features include operation at 16 MHz (the AG16C suffix indicates 16 MHz grade), an 8/16-bit external data bus with a 32-bit internal programming model, three independent SCCs supporting HDLC/SDLC, UART, transparent modes, and bisync protocols, plus 2 Kbytes of internal dual-port RAM for descriptor and buffer storage. The device supports 24-bit address space, hardware multiply/divide, seven levels of interrupt, and a low-power stop mode that freezes the core while preserving register state.
Typical applications include ISDN terminal adapters, branch-office routers, frame relay access devices, X.25 packet switches, industrial serial concentrators, and legacy telecommunication backplanes. The wide protocol coverage allows a single part to handle multiple WAN interfaces, reducing BOM count and PCB area compared to discrete CPU-plus-UART solutions.
When designing with this part, allocate external memory-mapped peripherals in the 16-Mbyte address space and follow Motorola bus arbitration rules for multi-master systems. The 144-pin LQFP package has a relatively large footprint for modern designs (20x20 mm), so socketed adapter boards are common when integrating into newer systems.
Alternatif penggantian untuk MC68302AG16C — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
Variasi di dalam seri ini
Model-series yang sama yang kompatibel dengan penggantian MC68302AG16C (sama faktor bentuk dan footprint) — berbeda di dalam Core Architecture, DMA Channels, RoHS Status, Data Bus Width, Mounting Type.
MC68302AG20C
✅ Drop-InKontak untuk harga
Lihat Datasheet →MC68302AG25C
✅ Drop-InKontak untuk harga
Lihat Datasheet →MC68302CAG16
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
MC68302RC16C
✅ Drop-In ⚠️ Spesifikasi Tidak DisahkanKontak untuk harga
Lihat Datasheet →MC68302AG16B
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
MC68302AG16C Rating Maksimal & Karakteristik Listrik
| Core Architecture | M68000 (32-bit programming model, 8/16-bit external data bus) |
| Core Family | M683xx / ColdFire-class M68000 |
| Frekuensi Bawah Maximum | 16 MHz |
| Tegangan Pemuat Kerja | 5 V |
| Paket | 144-pin LQFP (20x20 mm) |
| Tipe Mounting | Surface Mount |
| Number of Cores | 1 |
| Bit Width | 8/16-bit external / 32-bit internal |
| Address Bus Width | 24-bit |
| On-chip RAM | 2 Kbytes (dual-port) |
| Serial Communications Controllers (SCCs) | 3 |
| Serial Management Controllers (SMCs) | 2 |
| DMA Channels | Yes (multi-channel) |
| Parallel I/O | Yes (general-purpose port) |
| Timers | Yes (timer module) |
| Interrupt Levels | 7 |
| Rentang Suhu Kerja | 0C to +70C (commercial) |
| Tray Packaging | Tray |
Konfigurasi Pin MC68302AG16C
| Pin produk 1 | A1 — Address bus bit 1 |
| Pin produk 2 | A2 — Address bus bit 2 |
| Pin produk 3 | A3 — Address bus bit 3 |
| Pin produk 4 | A4 — Address bus bit 4 |
| Pin produk 5 | A5 — Address bus bit 5 |
| Pin produk 6 | A6 — Address bus bit 6 |
| Pin produk 7 | A7 — Address bus bit 7 |
| Pin produk 8 | A8 — Address bus bit 8 |
| Pin produk 9 | A9 — Address bus bit 9 |
| Pin produk 10 | A10 — Address bus bit 10 |
| Pin produk 11 | A11 — Address bus bit 11 |
| Pin produk 12 | A12 — Address bus bit 12 |
| Pin produk 13 | A13 — Address bus bit 13 |
| Pin produk 14 | A14 — Address bus bit 14 |
| Pin produk 15 | A15 — Address bus bit 15 |
| Pin produk 16 | A16 — Address bus bit 16 |
| Pin produk 17 | A17 — Address bus bit 17 |
| Pin produk 18 | A18 — Address bus bit 18 |
| Pin produk 19 | A19 — Address bus bit 19 |
| Pin produk 20 | A20 — Address bus bit 20 |
| Pin produk 21 | A21 — Address bus bit 21 |
| Pin produk 22 | A22 — Address bus bit 22 |
| Pin produk 23 | A23 — Address bus bit 23 |
| Pin produk 24 | VCC — +5 V power |
| Pin produk 25 | D0 — Data bus bit 0 |
| Pin produk 26 | D1 — Data bus bit 1 |
| Pin produk 27 | D2 — Data bus bit 2 |
| Pin produk 28 | D3 — Data bus bit 3 |
| Pin produk 29 | D4 — Data bus bit 4 |
| Pin produk 30 | D5 — Data bus bit 5 |
| Pin produk 31 | D6 — Data bus bit 6 |
| Pin produk 32 | D7 — Data bus bit 7 |
| Pin produk 33 | D8 — Data bus bit 8 |
| Pin produk 34 | D9 — Data bus bit 9 |
| Pin produk 35 | D10 — Data bus bit 10 |
| Pin produk 36 | D11 — Data bus bit 11 |
| Pin produk 37 | D12 — Data bus bit 12 |
| Pin produk 38 | D13 — Data bus bit 13 |
| Pin produk 39 | D14 — Data bus bit 14 |
| Pin produk 40 | D15 — Data bus bit 15 |
| Pin produk 41 | GND — Ground |
| Pin produk 42 | CS0 — Chip select 0 |
| Pin produk 43 | CS1 — Chip select 1 |
| Pin produk 44 | CS2 — Chip select 2 |
| Pin produk 45 | CS3 — Chip select 3 |
| Pin produk 46 | CS4 — Chip select 4 |
| Pin produk 47 | CS5 — Chip select 5 |
| Pin produk 48 | BR — Bus request |
| Pin produk 49 | BG — Bus grant |
| Pin produk 50 | BGACK — Bus grant acknowledge |
| Pin produk 51 | RESET — Hardware reset (active low) |
| Pin produk 52 | HALT — Halt (active low) |
| Pin produk 53 | CLKIN — Clock input |
| Pin produk 54 | CLKOUT — Clock output |
| Pin produk 55 | IPL0 — Interrupt priority level 0 |
| Pin produk 56 | IPL1 — Interrupt priority level 1 |
| Pin produk 57 | IPL2 — Interrupt priority level 2 |
| Pin produk 58 | AS — Address strobe |
| Pin produk 59 | DS — Data strobe |
| Pin produk 60 | R/W — Read/Write control |
| Pin produk 61 | DTACK — Data transfer acknowledge |
| Pin produk 62 | AVEC — Autovector |
| Pin produk 63 | BERR — Bus error |
| Pin produk 64 | VCC — +5 V power |
| Pin produk 65 | SCC1_RXD — SCC1 receive data |
| Pin produk 66 | SCC1_TXD — SCC1 transmit data |
| Pin produk 67 | SCC1_RTS — SCC1 request to send |
| Pin produk 68 | SCC1_CTS — SCC1 clear to send |
| Pin produk 69 | SCC1_CD — SCC1 carrier detect |
| Pin produk 70 | SCC1_CTS_BRG — SCC1 CTS / baud-rate generator |
| Pin produk 71 | SCC2_RXD — SCC2 receive data |
| Pin produk 72 | SCC2_TXD — SCC2 transmit data |
| Pin produk 73 | SCC2_RTS — SCC2 request to send |
| Pin produk 74 | SCC2_CTS — SCC2 clear to send |
| Pin produk 75 | SCC2_CD — SCC2 carrier detect |
| Pin produk 76 | GND — Ground |
| Pin produk 77 | SCC3_RXD — SCC3 receive data |
| Pin produk 78 | SCC3_TXD — SCC3 transmit data |
| Pin produk 79 | SCC3_RTS — SCC3 request to send |
| Pin produk 80 | SCC3_CTS — SCC3 clear to send |
| Pin produk 81 | SCC3_CD — SCC3 carrier detect |
| Pin produk 82 | SMC1_RXD — SMC1 receive data |
| Pin produk 83 | SMC1_TXD — SMC1 transmit data |
| Pin produk 84 | SMC2_RXD — SMC2 receive data |
| Pin produk 85 | SMC2_TXD — SMC2 transmit data |
| Pin produk 86 | VCC — +5 V power |
| Pin produk 87 | P0 — Parallel I/O port bit 0 |
| Pin produk 88 | P1 — Parallel I/O port bit 1 |
| Pin produk 89 | P2 — Parallel I/O port bit 2 |
| Pin produk 90 | P3 — Parallel I/O port bit 3 |
| Pin produk 91 | P4 — Parallel I/O port bit 4 |
| Pin produk 92 | P5 — Parallel I/O port bit 5 |
| Pin produk 93 | P6 — Parallel I/O port bit 6 |
| Pin produk 94 | P7 — Parallel I/O port bit 7 |
| Pin produk 95 | TIN1 — Timer 1 input |
| Pin produk 96 | TOUT1 — Timer 1 output |
| Pin produk 97 | TIN2 — Timer 2 input |
| Pin produk 98 | TOUT2 — Timer 2 output |
| Pin produk 99 | DREQ0 — DMA request 0 |
| Pin produk 100 | DACK0 — DMA acknowledge 0 |
| Pin produk 101 | DREQ1 — DMA request 1 |
| Pin produk 102 | DACK1 — DMA acknowledge 1 |
| Pin produk 103 | DONE — DMA done |
| Pin produk 104 | GND — Ground |
| Pin produk 105 | RAS0 — DRAM row address strobe 0 |
| Pin produk 106 | RAS1 — DRAM row address strobe 1 |
| Pin produk 107 | CAS0 — DRAM column address strobe 0 |
| Pin produk 108 | CAS1 — DRAM column address strobe 1 |
| Pin produk 109 | WE — Write enable |
| Pin produk 110 | OE — Output enable |
| Pin produk 111 | VCC — +5 V power |
| Pin produk 112 | FC0 — Function code 0 |
| Pin produk 113 | FC1 — Function code 1 |
| Pin produk 114 | FC2 — Function code 2 |
| Pin produk 115 | RMC — Read-modify-write |
| Pin produk 116 | SIZ0 — Transfer size 0 |
| Pin produk 117 | SIZ1 — Transfer size 1 |
| Pin produk 118 | DBEN — Data bus enable |
| Pin produk 119 | FREEZE — Freeze output (background debug) |
| Pin produk 120 | IPIPE0 — Instruction pipe 0 (debug) |
| Pin produk 121 | IPIPE1 — Instruction pipe 1 (debug) |
| Pin produk 122 | GND — Ground |
| Pin produk 123 | TEST — Test mode (factory, tie low in application) |
| Pin produk 124 | TCLK — Test clock (factory) |
| Pin produk 125 | TMS — JTAG test mode select |
| Pin produk 126 | TCK — JTAG test clock |
| Pin produk 127 | TDI — JTAG test data in |
| Pin produk 128 | TDO — JTAG test data out |
| Pin produk 129 | TRST — JTAG test reset |
| Pin produk 130 | VCC — +5 V power |
| Pin produk 131 | A0 — Address bus bit 0 (LSB) |
| Pin produk 132 | LDS — Lower data strobe |
| Pin produk 133 | UDS — Upper data strobe |
| Pin produk 134 | GND — Ground |
| Pin produk 135 | PORTC0 — Port C bit 0 |
| Pin produk 136 | PORTC1 — Port C bit 1 |
| Pin produk 137 | PORTC2 — Port C bit 2 |
| Pin produk 138 | PORTC3 — Port C bit 3 |
| Pin produk 139 | PORTC4 — Port C bit 4 |
| Pin produk 140 | PORTC5 — Port C bit 5 |
| Pin produk 141 | PORTC6 — Port C bit 6 |
| Pin produk 142 | PORTC7 — Port C bit 7 |
| Pin produk 143 | PORTC8 — Port C bit 8 |
| Pin produk 144 | PORTC9 — Port C bit 9 |
Aplikasi Umum
MC68302AG16C cocok untuk 6 aplikasis: ISDN Terminal Adapter, Branch-Office Router, X.25 Packet Switch, Industrial Serial Concentrator, Frame Relay Access Device (FRAD), Legacy Telecom Backplane Controller.
ISDN Terminal Adapter
The MC68302AG16C is a classic fit for ISDN terminal adapters because its three on-chip Serial Communications Controllers natively support HDLC framing required by ISDN BRI and PRI channels. Each SCC can be assigned to a B or D channel, eliminating the need for an external HDLC controller and significantly reducing BOM cost. The integrated DMA engine moves packet data between the SCC FIFOs and external RAM without CPU intervention, freeing the 16 MHz M68000 core for upper-layer protocol processing. With 2 Kbytes of dual-port RAM for buffer descriptors, designers can queue multiple frames per channel while maintaining deterministic latency. Compared to a discrete M68000 + UART solution, the MC68302AG16C cuts PCB area and component count while preserving the established M68000 software toolchain.
Direkomendasikan
Branch-Office Router
In branch-office router designs the MC68302AG16C's multi-protocol SCCs handle WAN-side HDLC/PPP/frame-relay links while one SMC manages the Ethernet or console UART interface. The 16 MHz M68000 core runs routing table lookups and IP/ICMP processing with predictable instruction timing, an advantage over speculative CPUs for real-time packet forwarding. Hardware bus arbitration allows direct connection to a downstream Ethernet MAC without glue logic. The integrated DMA offloads bulk packet movement, leaving CPU bandwidth for management and routing protocols. Its 24-bit address bus supports up to 16 Mbytes of DRAM plus flash, sufficient for routing tables in small-office installations.
Direkomendasikan
X.25 Packet Switch
The MC68302AG16C's SCCs implement the LAPB data-link layer of X.25 directly in hardware, while the M68000 core executes the X.25 packet-level protocol and call setup state machine. The dual-port 2 Kbyte on-chip RAM is well suited for descriptor rings that queue frames per virtual circuit without external logic. Designers can dedicate one SCC to each X.25 link and a third to a higher-layer backbone interface. The chip's deterministic interrupt latency and bus arbitration timing allow X.25 timers and retransmission deadlines to be met reliably. Compared to soft-implemented HDLC on a generic MCU, the MC68302AG16C's hardware CRC and bit stuffing deliver higher link utilization at the same CPU clock.
Direkomendasikan
Industrial Serial Concentrator
Multi-drop industrial protocols like Modbus, Profibus (via HDLC-like framing), and BISYNC can be carried concurrently on the MC68302AG16C's five serial channels, making it a serial concentrator for plant networks. The SMC channels provide slower-speed async or SPI-like interfaces for sensors, while the SCCs aggregate them into a backbone uplink. The integrated DMA moves large block transfers without burdening the CPU, and the parallel I/O port adds bit-banged signaling for legacy equipment. Commercial 0 to 70 C operation suits cabinet-mounted controllers. The 144-pin LQFP provides ample ground and power pins for the noisy industrial environment, simplifying PCB decoupling.
Direkomendasikan
Frame Relay Access Device (FRAD)
Frame relay FRADs use the MC68302AG16C's HDLC-capable SCCs to terminate the frame-relay DLCI links and the M68000 core to run the FRAD management software. Hardware bit stuffing, CRC, and zero-insertion on each SCC eliminate the software HDLC tax seen on microcontrollers without serial engines. The DMA controller streams encapsulated frames into external DRAM while the CPU handles congestion management and SNMP. With three SCCs, a single MC68302AG16C can terminate multiple frame-relay PVCs without external bridges. The chip's 16 MHz throughput is sufficient for typical sub-E1 aggregate bandwidths of legacy FRAD installations.
Direkomendasikan
Legacy Telecom Backplane Controller
Central-office backplanes in legacy telecom equipment use the MC68302AG16C as a per-line controller, where it manages signaling, alarm collection, and protocol conversion for multiple subscriber lines. The parallel I/O port monitors shelf alarms while the SCCs carry HDLC signaling to the upper-level controller. Hardware interrupt prioritization with seven priority levels allows deterministic handling of line-side events. The M68000 instruction set is well supported by long-lifecycle toolchains and field-proven compilers, which is critical for telecom gear with decades-long deployment horizons. The NRND status makes this part best suited for maintaining installed base rather than new product launches.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk MC68302AG16C — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | MC68302AG20C | MC68302AG25C | MC68302CAG16 | MC68302RC16C | MC68302AG16B |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 144-pin LQFP (20x20 mm) | 144-pin LQFP (20x20 mm) - same | 144-pin LQFP (20x20 mm) - same | 144-pin LQFP (20x20 mm) - same | 144-pin LQFP (20x20 mm) - same | 144-pin LQFP (20x20 mm) - same |
| Maximum Clock Frequency | 16 MHz | 20 MHz | 25 MHz | 16 MHz | 16 MHz | 16 MHz |
| Core | M68000 (32-bit PM) | M68000 (32-bit PM) | M68000 (32-bit PM) | M68000 (32-bit PM) | M68000 (32-bit PM) | M68000 (32-bit PM) |
| Number of SCCs | 3 | 3 | 3 | 3 | 3 | 3 |
| Number of SMCs | 2 | 2 | 2 | 2 | 2 | 2 |
| On-chip RAM | 2 Kbytes | 2 Kbytes | 2 Kbytes | 2 Kbytes | 2 Kbytes | 2 Kbytes |
| Address Bus Width | 24-bit | 24-bit | 24-bit | 24-bit | 24-bit | 24-bit |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
Diferensiator Kunci
- Integrated multi-protocol SCCs on-chip (vsMC68331CAG16)
- M68000 software compatibility (vsNewer ColdFire MCF5282)
- 144-LQFP same-footprint upgradability (vsMC68302AG25C)
Catatan Desain
The MC68302AG16C is a 5 V part; decouple each VCC pin with a 0.1 uF ceramic plus a 10 uF bulk tantalum placed within 25 mm of the package. The 144-pin LQFP provides multiple VCC and GND pins distributed around the package; route all VCC pins to the same 5 V plane and stitch a solid ground plane beneath the device. Add a 100 uF bulk cap near the board's 5 V entry point to absorb bus-step transients.
Route the 24-bit address bus and 16-bit data bus with matched trace lengths and 50 ohm characteristic impedance on a 4-layer stackup (signal/GND/VCC/signal). Keep bus traces short - the 16 MHz edge rates generate significant overshoot if traces exceed 50 mm. Place external DRAM chips adjacent to the dedicated RAS/CAS/DRAM pins to minimize skew on the row/column strobes.
Never leave the TEST pin floating - tie TEST directly to GND with a short trace, otherwise the part may enter factory test mode at reset. Always drive BR/BG through proper bus-arbitration logic when connecting a second bus master (e.g., a companion DMA controller), and assert BGACK only after the requesting master has been granted. Do not exceed the 16 MHz CLKIN specification - the AG16C speed grade is not warranted for 20 or 25 MHz operation.
Informasi Konformitas
RoHS, REACH, and lead-free status were not explicitly listed in the verified distributor listings we surveyed. As a 1990s commercial-temperature plastic LQFP, the part may or may not be lead-free finished - request the latest material declaration directly from NXP or your distributor before RoHS-restricted designs.
