STMicroelectronics STPCC5HEBC

Overview

STPCC5HEBC from STMicroelectronics is a single-chip x86-compatible system-on-chip integrating a 100/133 MHz 5th-generation x86 CPU core, 64-bit SDRAM controller, SVGA CRT controller with 135 MHz RAMDAC, 2D graphics engine, video pipeline (ITU-R 601/656 input/output), PCI 2.1 and ISA bus controllers, EIDE interface, and power management unit - designed for consumer PC-compatible information appliances such as set-top boxes and embedded terminals.

For engineers reviewing the STPCC5HEBC datasheet, STPCC5HEBC pinout, STPCC5HEBC application, or STPCC5HEBC equivalent, this page delivers verified architecture details, UMA memory mapping, PCI/ISA coexistence constraints, TV encoder timing modes (NTSC/PAL), and legacy BIOS compatibility requirements - all critical for legacy x86 system integration and obsolescence-aware design reuse.

Technical Context

The STPCC5HEBC implements a tightly coupled Unified Memory Architecture (UMA) sharing up to 128 MB of 64-bit SDRAM between CPU, graphics, and video subsystems - delivering 528 MB/s peak bandwidth. Its x86 core features an 8 KB unified cache, static 32-bit five-stage pipeline, and supports 2.5 V operation with dynamic clock control.

The integrated video pipeline includes dual-tap horizontal/vertical scalers, RGB↔YUV color space conversion, chroma/color keying, and programmable flicker filtering (2-line gamma-corrected or 3-line interlaced). The CRT controller drives 1280×1024@75 Hz via external reference only, while the digital TV encoder outputs NTSC-M or PAL-B/D/G/H/I/M/N with CCIR-656 compliance and four analog outputs (R/G/B/CVBS).

Key Specifications

Pinout & Package

STPCC5HEBC is housed in a 388-ball Plastic Ball Grid Array (PBGA) package with 71 ground balls, 26 VDD balls, and signal groups including 95 SDRAM pins, 56 PCI pins, 89 ISA pins, 34 IDE pins, and 12 TV output pins. Pin multiplexing exists between ISA/IDE and Local Bus functions, configured at reset via strap options on memory data lines.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar x86-compatible SoC applications.

Compared with Geode GX1 and Intel 810E, STPCC5HEBC uniquely combines ISA bus retention, analog TV encoding, and UMA-based video overlay in a single legacy-compatible package - making it irreplaceable for maintaining field-deployed STBs and HMIs where backward compatibility is mandatory.

Availability

STPCC5HEBC is available at Aetrix Electronics and suitable for set-top box manufacturing, industrial HMI deployment, legacy kiosk refurbishment, and embedded POS terminal production requiring stable component supply amid long-lifecycle product programs.

Supply support for STPCC5HEBC 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in microcontrollers, power management, automotive ICs, and legacy logic solutions with strong IP in embedded x86 architectures.

The STPC Consumer-II product line was engineered specifically for cost-sensitive, PC-compatible consumer information appliances - emphasizing integration density, analog video interfacing, and ISA bus compatibility in pre-USB/pre-DDR era designs.

FAQ

What is the maximum supported SDRAM capacity and configuration for STPCC5HEBC?

The STPCC5HEBC supports up to 128 MB of system memory using 64-bit wide SDRAM DIMMs. It accepts 8-, 16-, 32-, 64-, and 128-MB unbuffered or registered DIMMs with 16-, 64-, or 128-Mbit SDRAM chips. Memory banks must be configured in 4-bank topology; parity is not supported, and EDO/FPM DRAM is incompatible.

Does STPCC5HEBC require an external frequency synthesizer for CRT output?

No. The STPCC5HEBC's 135 MHz triple RAMDAC requires only an external crystal reference (typically 14.31818 MHz), not a full frequency synthesizer. The internal PLLs generate all necessary pixel clocks, eliminating external synthesis components and reducing layout complexity for VGA/SVGA monitor interfaces.

How does the STPCC5HEBC handle ISA and PCI bus coexistence?

The STPCC5HEBC integrates both buses natively: PCI operates as primary high-speed interconnect (up to 33 MHz), while ISA runs at 8.33 MHz derived from either the 14.318 MHz oscillator or PCI clock. Cycle translation logic bridges memory and I/O accesses between buses, enabling legacy ISA peripherals to function alongside PCI add-in cards without arbitration conflicts.

Is JTAG boundary scan supported, and what test capabilities does it provide?

Yes - STPCC5HEBC implements full IEEE 1149.1 JTAG compliance with boundary-scan register, IDCODE register, bypass register, and RAM BIST control. It supports production-level interconnect testing, pin-level fault detection, and in-system programming verification - critical for high-reliability industrial board manufacturing where physical probe access is limited.