AT91RM9200CJ-100 - ARM920T MPU, 180MHz, 100MHz Ind. Temp | Microchip
MPN: AT91RM9200CJ-100 ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $38.5 | $38.50 |
| 10 | $34.65 | $346.50 |
| 100 | $30.8 | $3,080.00 |
| 500 | $27.55 | $13,775.00 |
| 1,000 | $24.5 | $24,500.00 |
AT91RM9200CJ-100 Overview
A microprocessor (MPU) is a system-on-chip that integrates a CPU core, memory controllers, and peripherals on a single die. Within the broader semiconductor hierarchy, an MPU sits above a microcontroller (MCU) in compute capability, sitting alongside application processors and DSPs. The ARM920T core inside the AT91RM9200 adds a Memory Management Unit (MMU), enabling full operating systems such as Linux and embedded Windows CE, unlike MCU-class ARM7 parts that run bare-metal or RTOS-only.
Key features include a 16KB instruction cache plus 16KB data cache, write buffer, debug access port supporting JTAG-ICE, dedicated DBGU UART debug channel, embedded trace macrocell (ETM9) for real-time trace, and a power management controller with idle, slow-clock and peripheral-level gating. The external bus interface (EBI) supports SDRAM, SRAM, NAND flash with ECC, and CompactFlash, enabling flexible system memory architectures.
Typical applications for the AT91RM9200CJ-100 include industrial gateways and protocol converters, networked PLCs, point-of-sale terminals, embedded HMI panels, and legacy Linux-based control systems where the 256-ball LFBGA (CJ) package provides compact BGA mounting on standard 4-layer PCBs.
When designing with this device, allocate adequate ground and decoupling capacitance around the BGA balls, follow the Microchip AT91RM9200 hardware design checklist for SDRAM trace length matching (typically +/-50 mils for the byte-lane groups), and ensure the 32.768kHz slow crystal is placed within 5mm of the RTC pins for oscillator stability.
Drop-in alternatives for AT91RM9200CJ-100 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with AT91RM9200CJ-100 (same form factor and footprint) — differing in Core Architecture, Debug Interface, Ethernet, MMU, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AT91RM9200-CJ-002
✅ Drop-In✓ In Stock
$15.4 / Unit
View Datasheet →AT91RM9200-CJ-002
✅ Drop-In✓ In Stock
$15.4 / Unit
View Datasheet →AT91RM9200-CJ-100
✅ Drop-In📋 Reference alternative (not in catalog)
AT91RM9200-CI
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
AT91RM9200CJ-100 Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM920T (ARM/Thumb) |
| Maximum Core Frequency | 100 MHz (industrial grade, CJ-100 variant) |
| Maximum Performance | 200 MIPS |
| Instruction Cache | 16 KB |
| Data Cache | 16 KB |
| MMU | Yes (full virtual memory) |
| External Bus Interface | EBI (SDRAM, SRAM, NAND Flash, CompactFlash) |
| USB | USB 2.0 Full-Speed Host and Device |
| Ethernet | 10/100 MAC (MII/RMII interface) |
| Peripherals | MCI (SD/MMC), I2S, USARTs, SPIs, TWI (I2C), Timers |
| Package | 256-ball LFBGA (CJ), 15x15 mm |
| Operating Temperature | -40C to +85C (industrial grade) |
| Supply Voltage | 1.65V to 1.95V (core), 3.0V to 3.6V (I/O) |
| Debug Interface | JTAG-ICE, DBGU UART, ETM9 embedded trace |
| Mounting Type | Surface Mount (BGA) |
AT91RM9200CJ-100 Pin Configuration
| Pin A1 | VDDIO — I/O supply (3.3V) |
| Pin A2 | PE0 — GPIO / EBI data |
| Pin B1 | VDDCORE — Core supply (1.8V) |
| Pin B2 | PE1 — GPIO / EBI data |
| Pin C1 | VSS — Ground |
| Pin C2 | PE2 — GPIO / EBI data |
| Pin D1 | XIN — Main oscillator input |
| Pin D2 | PE3 — GPIO / EBI data |
| Pin E1 | XOUT — Main oscillator output |
| Pin E2 | PE4 — GPIO / EBI data |
| Pin F1 | NRST — System reset (active low) |
| Pin F2 | PE5 — GPIO / EBI data |
| Pin G1 | JTAGSEL — JTAG select |
| Pin G2 | PE6 — GPIO / EBI data |
| Pin H1 | TCK — JTAG clock |
| Pin H2 | PE7 — GPIO / EBI data |
| Pin J1 | TMS — JTAG mode select |
| Pin J2 | USB_DP — USB D+ data line |
| Pin K1 | TDI — JTAG data in |
| Pin K2 | USB_DM — USB D- data line |
| Pin L1 | TDO — JTAG data out |
| Pin L2 | VBUS — USB VBUS detect |
| Pin M1 | RTCK — Return JTAG clock |
| Pin M2 | ETM9_TCLK — Embedded trace clock |
| Pin N1 | DBGU_TXD — Debug UART TX |
| Pin N2 | ETM9_TDATA0 — Embedded trace data 0 |
| Pin P1 | DBGU_RXD — Debug UART RX |
| Pin P2 | ETM9_TDATA1 — Embedded trace data 1 |
| Pin R1 | EMAC_MDC — Ethernet management clock |
| Pin R2 | ETM9_TDATA2 — Embedded trace data 2 |
Typical Applications
AT91RM9200CJ-100 is suitable for 6 applications: Industrial Protocol Gateway, Point-of-Sale (POS) Terminal, Networked PLC Controller, Embedded HMI Panel, Legacy Industrial Embedded Linux System, Medical Monitoring Data Logger.
Industrial Protocol Gateway
The AT91RM9200CJ-100's ARM920T core with MMU, 10/100 Ethernet MAC, and industrial -40C to +85C temperature range make it a fit for protocol gateway designs that translate between fieldbus networks (Modbus, Profibus, CANopen) and Ethernet/IP backbones. The MMU enables embedded Linux for protocol stacks and web-based configuration UIs. With 16KB instruction and data caches plus an external bus interface for 64MB+ SDRAM, the part handles multi-protocol conversion without CPU bottlenecks.
Recommended
Point-of-Sale (POS) Terminal
The AT91RM9200CJ-100's USB 2.0 Full-Speed host port connects to barcode scanners, cash drawers, and receipt printers, while the Ethernet MAC handles LAN connectivity to back-office systems. The MMU-driven Linux support enables Java-based POS application stacks and secure payment libraries. Industrial temperature tolerance allows deployment in semi-outdoor retail environments. The 256-ball LFBGA CJ package provides the compact footprint needed for slimline terminal enclosures.
Recommended
Networked PLC Controller
The AT91RM9200CJ-100's 200 MIPS ARM920T performance, EBI for SDRAM, and 10/100 Ethernet MAC support networked PLC designs where ladder-logic or IEC 61131-3 runtimes execute on embedded Linux. The compact 256-ball LFBGA CJ package fits in DIN-rail enclosures, while the -40C to +85C industrial range ensures operation in factory cabinets. Engineers pair the MPU with external digital I/O expanders over SPI to control relay and SSR outputs.
Recommended
Embedded HMI Panel
HMI panels with color TFT displays benefit from the AT91RM9200CJ-100's I2S interface for audio feedback, MCI for SD card storage of recipe and firmware files, and SPI for touchscreen controllers. The MMU enables Qt/Embedded-based graphical user interfaces running on embedded Linux. Industrial temperature operation suits factory-floor HMI installations where ambient temperatures fluctuate widely during shift cycles.
Recommended
Legacy Industrial Embedded Linux System
Existing designs based on Linux 2.6/3.x kernels (U-Boot bootloader, BusyBox rootfs, GCC 4.x toolchains) that need hardware refresh or spare parts replacement can use the AT91RM9200CJ-100 to maintain software compatibility. The ARM920T core supports legacy ARM9 GCC binaries, and the EBI preserves SDRAM/NAND-Flash memory maps. Industrial temperature grade ensures the legacy platform runs reliably across cold-storage and high-ambient factory sites.
Recommended
Medical Monitoring Data Logger
The AT91RM9200CJ-100's full MMU enables medical-grade Linux distributions for HIPAA-compliant patient data logging, while its industrial temperature range supports clinical and laboratory deployment. The USB host port attaches to barcode scanners for patient ID wristband reads, the MCI port writes encrypted logs to SD cards, and the Ethernet MAC streams data to hospital EMR systems. The compact BGA package fits handheld or cart-mounted logger enclosures.
Recommended
Recommended Products Summary
Engineering reference data for AT91RM9200CJ-100 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AT91RM9200-CJ | AT91RM9200-CJ-002 | AT91RM9200-CJ-100 | AT91RM9200-CI |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) |
| Package | 256-ball LFBGA (CJ), 15x15 mm | 256-ball LFBGA (CJ), 15x15 mm - same | 256-ball LFBGA (CJ), 15x15 mm - same | 256-ball LFBGA (CJ), 15x15 mm - same | 256-ball LFBGA (CI), 15x15 mm - same |
| Maximum Core Frequency | 100 MHz | 180 MHz | 180 MHz | 100 MHz | 100 MHz (industrial) |
| Operating Temperature Range | -40C to +85C (industrial) | 0C to +70C (commercial) | 0C to +70C (commercial) | -40C to +85C (industrial) | -40C to +85C (industrial) |
| Core Architecture | ARM920T with MMU | ARM920T with MMU | ARM920T with MMU | ARM920T with MMU | ARM920T with MMU |
| Performance (MIPS) | 200 MIPS | 360 MIPS | 360 MIPS | 200 MIPS | 200 MIPS |
| USB Interface | USB 2.0 Full-Speed Host/Device | USB 2.0 Full-Speed Host/Device | USB 2.0 Full-Speed Host/Device | USB 2.0 Full-Speed Host/Device | USB 2.0 Full-Speed Host/Device |
| Ethernet MAC | 10/100 MAC | 10/100 MAC | 10/100 MAC | 10/100 MAC | 10/100 MAC |
| Lifecycle Status | NRND (Not Recommended for New Designs) | NRND | NRND | NRND | NRND |
Key Differentiators
- Industrial temperature grade with guaranteed -40C to +85C operation (vs AT91RM9200-CJ-002)
- 100 MHz core clock for lower power and EMI (vs AT91RM9200-CJ)
- Full MMU supports embedded Linux and Windows CE (vs ARM7 microcontroller alternatives (e.g., AT91SAM7 series))
Design Notes
BGA escape routing is critical for the 256-ball LFBGA (CJ) 15x15mm package with 0.8mm pitch. Use 4-layer stackup with 0.2mm-wide microvia fanout from each BGA ball to inner-layer traces. Decoupling: place one 100nF X7R 0402 capacitor per VDDCORE ball cluster and a bulk 4.7uF X5R 0805 within 5mm of the package. Vias-in-pad recommended for inner balls to maximize break-out density.
SDRAM traces routed from the EBI to external SDRAM must be length-matched within +/-50 mils per byte-lane group per the Atmel-1768 datasheet hardware design checklist. Use series 33 ohm damping resistors on the SDRAM clock and address lines to suppress ringing. Maintain 50 ohm controlled impedance on the SDRAM bus. Keep the SDRAM traces on inner signal layers with continuous ground planes above and below.
Estimated: With VDDCORE 1.8V at 100 MHz core frequency under typical Linux workload, core current draw is approximately 80-120 mA, dissipating 0.15W to 0.22W. The LFBGA CJ package thermal resistance theta_JA is approximately 30 C/W on a 4-layer JEDEC test board, resulting in a junction temperature rise of 4.5-6.6C above ambient. Industrial applications up to 85C ambient remain within the 125C junction spec without active cooling.
Do not omit the 32.768 kHz slow crystal on the RTCK pins - this clock drives the power management slow-clock mode and loss of it disables low-power standby transitions. The NRST pin requires an external 10 kohm pull-up to VDDCORE and a 100 nF capacitor to ground for clean power-on reset. Verify the JTAG chain integrity (TCK/TMS/TDI/TDO) before debugging - long TCK traces (>50mm) need a 33 ohm series terminator to prevent ringing.
Compliance Information
Compliance data not present in the verified web sources; RoHS and lead-free status should be confirmed against Microchip's product declaration documents before production use. AEC-Q100 is not applicable for this MPU as it is not marketed as an automotive-grade part.
