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Texas Instruments PCI1221GHK
- Part No.:
- PCI1221GHK
- Manufacturer:
- Texas Instruments
- Category:
- Controllers
- Package:
- -
- Datasheet:
-
PCI1221GHK.pdf
- Description:
- PCMCIA BUS CONTROLLER PBGA209
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Product details
Overview
PCI1221GHK from Texas Instruments is a dual-socket PCI-to-PC Card controller supporting both 16-bit PC Cards and 32-bit CardBus cards in mixed 3.3-V/5-V environments. It delivers >130 MBps bidirectional throughput via pipelined architecture, complies with PCI Local Bus Specification 2.2 and 1997 PC Card Standard, and integrates ExCA-compatible register mapping for legacy system compatibility.
For engineers reviewing the PCI1221GHK datasheet, PCI1221GHK pinout, PCI1221GHK application, or PCI1221GHK equivalent, this device is critical for notebook/desktop add-in card designs requiring hot-swap support, burst-mode PCI-to-CardBus bridging, and ACPI 1.0–compliant power management with serial EEPROM configuration.
Technical Context
The PCI1221GHK implements a dual-socket architecture with independent buffering and pipelined data paths for CardBus A and B sockets, enabling concurrent 32-bit transfers at 33 MHz. Its PCI interface operates as both master and slave, initiating bus mastering during CardBus transactions.
It supports four interrupt signaling modes (parallel PCI, parallel ISA, serialized ISA, serialized PCI), five general-purpose I/Os, and programmable CLKRUN output. The device uses advanced submicron CMOS technology and includes dedicated terminals for TPS2202/2206 dual-slot power switch control via CLOCK/DATA/LATCH serial interface.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PCI Compliance | PCI Local Bus Spec 2.2, Power Management Interface Spec 1.0, ACPI 1.0 - ensures interoperability with standard host bridges and OS power states |
| PC Card Support | Two independent sockets; mix-and-match 16-bit PC Cards and 32-bit CardBus cards - enables flexible peripheral expansion in single-slot-constrained designs |
| Data Throughput | >130 MBps sustained burst transfer - achieved via pipelined architecture and full 32-bit PCI cycles for high-bandwidth peripherals like network or storage cards |
| Power Signaling | 3.3-V core logic with universal PCI interface compatible with 3.3-V and 5-V signaling - eliminates level-shifting requirements in hybrid voltage systems |
| Socket Control | ExCA-compatible registers mapped in memory/I/O space; Intel 82365SL-DF register compatibility - simplifies driver porting and BIOS integration |
| Interrupt Flexibility | Supports parallel PCI, parallel ISA, serialized ISA + PCI, and serialized PCI + ISA - accommodates diverse platform interrupt architectures without external logic |
| Package | 208-pin GHK plastic ball grid array - high-density footprint optimized for space-constrained mobile/embedded motherboard layouts |
Pinout & Package
PCI1221GHK is packaged in a 208-pin plastic ball grid array (GHK) with 0.8-mm pitch, designed for surface-mount assembly on high-density PCBs. The package supports thermal dissipation suitable for continuous operation in notebook and desktop host environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PCLK (A10) | PCI Clock Input | Primary timing reference for all PCI transactions; sampled on rising edge - must be clean 33-MHz clock with <1 ns jitter for reliable bus arbitration |
| PRST (A14) | PCI Reset Input | Asynchronous reset that places outputs in high-impedance state and clears internal registers - deassertion restores default configuration |
| AD31–AD0 (A4–H5) | PCI Address/Data Bus | Multiplexed 32-bit address/data lines - carry 32-bit address during address phase, 32-bit data during data phase of PCI cycles |
| C/BE3–C/BE0 (A15, C8, A5, E2) | PCI Byte Enable | Four active-low signals selecting byte lanes during data phase - determines which of four 8-bit bytes are valid in each 32-bit transfer |
| A_CAD0–A_CAD31 (U11–F19) | CardBus Socket A Data/Address | 68-pin CardBus interface for Socket A - carries multiplexed address/data, command, and status signals per PC Card Standard |
| B_CAD0–B_CAD31 (W11–V8) | CardBus Socket B Data/Address | 68-pin CardBus interface for Socket B - electrically isolated from Socket A to prevent cross-socket interference during hot insertion |
| CLOCK/DATA/LATCH (E19/F14/F17) | Serial Power Switch Interface | Three-wire interface to TI TPS2202/2206 - controls individual socket power sequencing and enables hot-swap safety compliance |
| RI_OUT/PME (C14) | Ring Indicate / Power Management Event | Open-drain output signaling modem ring detect or wake event - asserted to request system exit from low-power state |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent CardBus sockets | Enables simultaneous use of two high-speed peripherals (e.g., Gigabit Ethernet + SSD) without shared bandwidth contention |
| Hot-insertion and removal support | Internal signal buffering eliminates need for external bus-hold or termination - reduces BOM cost and layout complexity |
| Serial EEPROM interface | Loads subsystem ID/vendor ID at boot - allows OEM customization without mask ROM or firmware modification |
| Programmable CLKRUN output | Controls PCI clock gating during idle periods - directly reduces host bridge power consumption in ACPI S3/S4 states |
| Multifunction PCI device | Separate PCI configuration spaces for each socket - enables independent enumeration, resource allocation, and driver binding in OS |
| Five PCI memory windows | Provides flexible memory-mapped access to up to 5 distinct regions per socket - simplifies driver development for complex peripherals |
Applications
| Mobile Notebook Expansion | Desktop Add-in Card Bridge |
|---|---|
Use Scenario: Adding wireless LAN, Bluetooth, or solid-state storage to thin-and-light notebooks with limited internal expansion slots. IC Role / Device Role / Timing Role: PCI1221GHK acts as a high-throughput bridge between the host's PCI bus and dual CardBus sockets, managing hot-plug detection, power sequencing, and burst-mode data transfers. Use Value: Enables full 32-bit CardBus performance (>130 MBps) without compromising system power budget, leveraging integrated ACPI 1.0 and PCI PMI 1.0 compliance. | Use Scenario: Enabling legacy PC Card peripherals (e.g., SCSI adapters, ISDN modems) in modern desktop systems via low-profile PCIe-to-PCI bridge add-in cards. IC Role / Device Role / Timing Role: PCI1221GHK serves as the primary PC Card controller on the daughterboard, providing ExCA register compatibility and parallel/serial interrupt routing to match host chipset expectations. Use Value: Eliminates need for discrete level shifters or interrupt arbiters due to native 3.3-V/5-V signaling support and four interrupt mode options. |
| Industrial Embedded I/O Module | Medical Imaging Peripheral Hub |
Use Scenario: Integrating fieldbus interfaces (CAN, Profibus) and analog I/O modules into ruggedized embedded controllers using standardized PC Card form factor. IC Role / Device Role / Timing Role: PCI1221GHK manages dual-socket power control, GPO/GPI routing, and CardBus-to-PCI bridging while maintaining strict timing for deterministic real-time I/O response. Use Value: Five configurable PCI memory windows and two I/O windows per socket allow precise resource mapping for time-critical drivers without memory overlap conflicts. | Use Scenario: Supporting high-resolution video capture and DICOM storage cards in portable ultrasound or endoscopy systems requiring hot-swappable media and low-latency frame buffering. IC Role / Device Role / Timing Role: PCI1221GHK functions as the central hub for dual CardBus sockets, handling burst-mode pixel data transfers, LED activity indication, and SUSPEND/CLKRUN coordination with imaging subsystem clocks. Use Value: Pipelined architecture sustains >130 MBps throughput needed for uncompressed HD video streaming, while LED pins provide immediate visual feedback on card activity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PCI-to-PC Card controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCI1220GHK | Single-socket variant with identical pinout and register set - lacks Socket B signals and associated buffers | Suitable only for designs requiring one CardBus slot; cannot support dual-card configurations or hot-swap redundancy | Select PCI1220GHK when board space or cost constraints eliminate need for second socket; retains full software compatibility |
| PLX Technology PCI9050 | PCI-to-local bus bridge (not PC Card–specific); requires external logic for ExCA register mapping and CardBus timing | Demands custom FPGA/CPLD implementation for PC Card interface - increases design cycle time and validation effort | Choose PCI9050 only when developing non-standard PC Card derivatives or requiring proprietary bus extensions beyond PCMCIA spec |
Compared with PCI1220GHK and PCI9050, the PCI1221GHK uniquely delivers production-ready dual-socket CardBus support with zero external logic, making it the only drop-in solution for certified PC Card/PCMCIA-compliant systems requiring hot-swap and ACPI power management.
Availability
PCI1221GHK is available at Aetrix Electronics and suitable for mobile computing platforms, industrial embedded controllers, and medical imaging equipment requiring stable component supply across long-lifecycle programs.
Supply support for PCI1221GHK 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
Texas Instruments is a global semiconductor leader focused on analog, embedded processing, and connectivity technologies with over 50 years of innovation in high-reliability interface solutions.
The PCI1221GHK belongs to TI's PC Card controller product line, engineered specifically for seamless integration of legacy and CardBus peripherals into PCI-based computing platforms with minimal firmware overhead and maximum compliance assurance.
FAQ
What is the primary function of the PCI1221GHK in a system architecture?
The PCI1221GHK serves as a dual-socket PCI-to-PC Card bridge, enabling communication between a host PCI bus and two independent PC Card or CardBus peripherals. It handles protocol translation, hot-swap control, power management signaling (ACPI/PMI), and ExCA register mapping - allowing standard PC Card drivers to operate without modification on PCI-based platforms. This functionality is integral to the PCI1221GHK's role in notebook and desktop expansion subsystems.
Does the PCI1221GHK support both 16-bit PC Cards and 32-bit CardBus cards simultaneously?
Yes, the PCI1221GHK supports mixed operation: one socket can host a 16-bit PC Card while the other hosts a 32-bit CardBus card, with independent 3.3-V or 5-V power control per socket. Its internal logic automatically adapts timing and signaling per card type, and the device complies fully with the 1997 PC Card Standard governing this interoperability. This capability is a defining feature of the PCI1221GHK.
How does the PCI1221GHK implement hot insertion and removal without external components?
The PCI1221GHK integrates internal signal buffering for all card-facing I/Os, eliminating the need for external bus-hold resistors or level translators during hot-swap events. Its pin drivers are designed to tolerate floating inputs and transient voltage excursions during insertion/removal, and the serial power switch interface (CLOCK/DATA/LATCH) coordinates controlled power ramp-up/down per socket. This robustness is built into the PCI1221GHK silicon and verified per PCMCIA hot-swap specifications.
What interrupt configurations does the PCI1221GHK support, and why does it matter for system integration?
The PCI1221GHK supports four interrupt modes: parallel PCI, parallel ISA, serialized ISA + PCI, and serialized PCI + ISA. This flexibility allows direct connection to legacy ISA interrupt controllers or modern PCI-integrated APICs without glue logic. For example, serialized modes reduce pin count on host chipsets, while parallel modes simplify BIOS initialization. This configurability is essential for the PCI1221GHK's adoption across diverse platform generations.
Is the PCI1221GHK pin-compatible with earlier TI PC Card controllers like the PCI1210 or PCI1220?
The PCI1221GHK shares the same 208-pin GHK package and core pinout with the PCI1220GHK, including identical PCI, power, and multifunction terminal assignments. However, it adds dedicated pins for Socket B (e.g., B_CAD0–B_CAD31, B_CFRAME) not present on the single-socket PCI1220GHK. Thus, PCI1221GHK is not pin-compatible with PCI1210, but is a superset replacement for PCI1220GHK in dual-socket designs - a key distinction for the PCI1221GHK's upgrade path.
PCI1221GHK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- -
- Programmable:
- Not Verified
- Protocol:
- -
- Function:
- -
- Interface:
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- Standards:
- -
- Voltage - Supply:
- -
- Current - Supply:
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- Operating Temperature:
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- Supplier Device Package:
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PCI1221GHK FAQ
1.How can I place an order for PCI1221GHK through Aetrix?
Please submit a Request for Quotation (RFQ) for PCI1221GHK 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 PCI1221GHK reliable?
The price and inventory of PCI1221GHK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCI1221GHK is usually 5 days.
3.What payment methods are accepted for PCI1221GHK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCI1221GHK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCI1221GHK?
PCI1221GHK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCI1221GHK 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 PCI1221GHK?
For technical support, including PCI1221GHK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCI1221GHK requirements.
6.How does Aetrix verify that PCI1221GHK is sourced from the original manufacturer or authorized distributors?
All PCI1221GHK 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 PCI1221GHK meets industry standards.
7.What is the process for return or replacement of PCI1221GHK?
All PCI1221GHK units undergo pre-shipment inspection (PSI). If there is an issue with PCI1221GHK, 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 PCI1221GHK part is unused and in its original packaging.
Return procedure for PCI1221GHK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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