The Curtiss-Wright/DY-4 SCP-122 is a 3U CompactPCI single board computer built on the IBM PowerPC 750FX processor running at 800 MHz with 1856 DMIPS performance. Engineered for space and power-constrained rugged environments, it delivers balanced processing capability with minimal power draw. The SCP-122 is offered in System Controller (SCP) convection-cooled and Dependent Controller (DCP) conduction-cooled configurations across ruggedization levels L0 through L200.
## Technical Specifications
**Processor & Memory**
• CPU: IBM PowerPC 750FX at 800 MHz with 512 KB internal L2 cache
• Main memory: 128 Mbytes SDRAM with ECC, upgradeable to 256 Mbytes
• Non-volatile storage: 64 Mbytes Flash memory with Permanent Alternate Boot Site (PABS) capability
• nvRAM: 32 Kbytes Ferroelectric with 10-year data retention
**CompactPCI Bus & Expansion**
• PICMG 2.0, Revision 3.0 compliant
• Operation at 33 MHz or 66 MHz with 3.3V or 5V signaling
• Integrated System Controller and Peripheral Controller
• PMC expansion site: 64-bit, 33/66 MHz with full 64-bit user I/O
• PMC signaling: 3.3V or 5V compatible
**Interfaces**
• 1× 10/100BaseT Ethernet (IEEE 802.3)
• 2× RS-232 channels: asynchronous/synchronous, up to 115 Kbaud
• 2× RS-422 channels: asynchronous/synchronous, HDLC/SDLC capable; programmable as differential discrete I/O
• 1× USB 1.1 port: 12 Mbit/s full speed, 1.5 Mbit/s low speed
• Discrete I/O: Up to 16 bits LVTTL-compatible, programmable input/output with interrupt-on-change (edge-selectable)
• RS-422/485 differential discretes: up to eight total (four input, four output maximum) with interrupt capability
• Discrete outputs: 16 mA sink, 12 mA source
**Timers & RTC**
• One 32-bit general purpose timer; three cascadable 24-bit timers
• Avionics Watchdog Timer with programmable timeout
• On-board Real-Time Clock
## Key Features
• Upgrade path to IBM 750GX processor
• Configurable thermal management (convection or conduction cooling)
• Multiple ruggedization options for demanding mission profiles
• On-board pull-up resistors for discrete I/O
## Typical Applications
Aerospace, defense, and satellite payloads requiring high-density computing in thermally and power-limited platforms.
## Compatibility & Integration
Full PICMG 2.0 compliance enables integration into standard CompactPCI chassis. PMC slot supports industry-standard mezzanine cards. Foundation firmware includes debug monitor and non-volatile memory programming.
