4-18 Theory of Operation
A simplified block diagram of the PCMCIA Controller is shown in Figure 4-9.
4.3.2.5 TI1130 PCMCIA Controller
The Tl PCI1130 is a high-performance PCI-to-PC Card controller that supports two independent PC Card
sockets compliant with the 1995 PC card standard. The PCI1130 provides a set of features that make it
ideal for bridging between PCI and PC Cards in both notebook and desktop computers. The 1995 PC Card
standard retains the 16-bit PC Card specification defined in PCMCIA release 2.1 and defines the new 32-
bit PC Card, called CardBus, capable of full 32-bit data transfers at 33 MHz. The PCI1130 supports any
combination of 16-bit and CardBus PC Cards in its two sockets, powered at 3.3 V or 5 V as required.
The PCI 1130 is compliant with the PCI local bus specification revision 2.1, and its PCI interface can act
as either a PCI master device or a PCI slave device. The PCI bus mastering is initiated during 16-bit PC
Card DMA transfers or CardBus PC Card bus mastering cycles.
All card signals are internally buffered to allow hot insertion and removal without external buffering. The
PCI1130 internal data path logic allows the host to access 8-, 16-, and 32-bit cards using full 32-bit PCI
cycles for maximum performance. Independent 32-bit write buffers allow fast-posted writes to improve
system-bus utilization.
An advanced CMOS process is used to achieve low system-power consumption while operating at PCI
clock rates up to 33 MHz. Several low-power modes allow the host power-management system to further
reduce power consumption.