OZ6833

Features:

• Single-chip CardBus host adapter
• Supports 2 PCMCIA 1.0 and JEIDA 4.2 R2 cards or 2 CardBus cards
• ACPI-PCI Bus Power Management Interface Specification Rev1.0 Compliant
• Supports OnNow LAN wakeup, OnNow Ring Indicate, PCI CLKRUN#, PME#, and CardBus CCLKRUN#
• Compliant with PCI specification v2.1S, 1998 PC Card Standard 7.0
• Yenta PCI to PCMCIA CardBus Bridge register compatible
• ExCA (Exchangeable Card Architecture) compatible registers map-able in memory and I/O space
• Intel 82365SL PCIC Register Compatible
• Supports PCMCIA_ATA Specification
• Supports 5V/3.3V PC Cards and 3.3V CardBus cards
• Supports two PC Card or CardBus slots with hot insertion and removal
• Supports multiple FIFOs for PCI/CardBus data transfer
• Supports Direct Memory Access for PC/PCI and PC/Way on PC Card socket
• Programmable interrupt protocol: PCI, PCI+ISA, PCI/Way, or PC/PCI interrupt signaling modes
• Win'98 IRQ and PC-97/98 compliant
• Parallel or Serial interface for socket power control devices (TI or Micrel)
• Zoomed Video Support
• Integrated PC 98 Subsystem Vendor ID support, with auto lock bit
• LED Activity Pins


Pinout




Description

The OZ6833 ACPI CardBus controller provides a high performance, synchronous, 32-bit, bus master/target interface between computers and plug in PC Cards. CardBus is the new 32-bit interface standard of Personal Computer Memory Card International Association, PCMCIA. The CardBus OZ6833 provides 32-bit interface with multiplexed address and data lines. This will allow the addition of high performance computer system enhancements and new functions in a user-friendly way.

Further, the expansion capability of the CardBus OZ6833 will provide benefits to the end user. CardBus is intended to support "temporal" add-in functions on PC Cards, such as Memory cards, Network interfaces, FAX/Modems and other wireless communication cards, etc. The high performance and capability of the CardBus interface will enable further development of many new functions and applications.

The OZ6833 CardBus controller is a 33MHz PCI compliant master/target device that attaches to the PCI bus and manages two PC Card sockets. The PC Card sockets support both 3.3V / 5V versions of 8/16-bit PCMCIA R2 card or 32-bit CardBus card. R2 card support is compatible with the Intel 82365SL PCIC controller. CardBus card support is fully compatible with the 1998 PC Card Standard V7.0. The OZ6833 is a stand alone device. It does not require an additional buffer chip for the two PC Card socket interface. The OZ6833 is implemented with a complex multiple FIFO data buffer for the PCI and CardBus interface to provide better PCI/CardBus access.

The FIFO buffers allow the bridge to accept data from a target bus while moving data to it, facilitating deadlock prevention. In addition, the OZ6833 is designed with dynamic PC Card hot insertion and removal and auto configuration capabilities.

The OZ6833 ACPI CardBus Controller provides the power saving mixed 5V / 3.3V capability. An advance CMOS process minimizes system power consumption. The device also provides a power-down mode, allowing host software to reduce power consumption further while stopping internal clock distribution and the clocks on PC Card sockets. The OZ6833 is not only a CardBus bridge, but also a socket controller. The OZ6833 supports two master devices and arbitrates the priority of each. Further, it supports inter CardBus direct data transfer. The register set in the OZ6833 is the superset of the OZ67xx register set, assuring full compatibility with existing socket/card-services software and PC-card applications. The OZ6833 provides the most advanced design flexibility for the PC Card interface in notebook computer design.

To enhance the performance between the PCI bus and any CardBus card, two buffers of OZ6833 (each composed of 16 double words) are added on both sides going from PCI to CardBus or the other way around. By implementing these buffers, the OZ6833 will not refuse data from a target bus while moving data and preventing deadlock situations.

In order to allow maximum flexibility for system designers, the CINT# of the PC card 32-bit of OZ6833 may be programmed to steer to either INTA# or INTB# of the PCI bus. Further, the interrupts may be programmed to route through the bridge to either PCI INT lines or IRQ interrupts on the ISA bus.