3
–
1
3 Feature/Protocol Descriptions
Figure 3
–
1 shows a simplified system implementation example using the PCI1620. The PCI interface includes all
address/data and control signals for PCI protocol. Highlighted in this diagram is the functionality supported by the
PCI1620. The PCI1620 supports PME wake-up from D3
cold
through D0, three interrupt modes, and multifunction
terminals that can be programmed for a wide variety of functions.
PCI Bus
PCI1620
Activity LEDs
PCI950
IRQSER
Deserializer
IRQSER
3
Interrupt
Controller
INTA
INTB
IRQ2
–
15
Multiplexer
23
23
TPS2228
Power
Switch
3
External ZV Port
VGA
Controller
Audio
Subsystem
Zoomed Video
19
4
Zoomed Video
NOTE: The PC Card interface is 68 terminals for CardBus and 16-bit PC Cards. In zoomed video mode 23 terminals are used for routing the
zoomed video signals to the VGA controller and audio subsystem.
68
68
68
68
23
PC Card/
UltraMedia
Socket A
PC Card
UltraMedia
Socket B
Figure 3
–
1. PCI1620 System Block Diagram
3.1
Summary of UltraMedia Cards
3.1.1
SmartMedia
Formerly called solid-state floppy-disk card (SSFDC), SmartMedia cards are about 1/3 the area of a standard PC
Card and only 0,76 mm in thickness. The specifications for SmartMedia cards are governed by the SSFDC Forum.
There are two basic types of SmartMedia cards, flash memory cards and mask ROM cards. The majority of
SmartMedia cards use an embedded NAND-type flash memory and are based on the
package equals card
concept.
This allows the cards to be very thin, and does not require a controller to be included on the SmartMedia card.
Almost all SmartMedia cards are 3.3-V cards, but there are also 5-V versions of the 1-, 2-, and 4-Mbyte
flash-memory-based cards. Additionally, all SmartMedia cards have a 22-terminal, 8-bit interface. The recommended
logical format of SmartMedia cards is based on the DOS/FAT format.
SmartMedia cards are currently used in many types of consumer electronic devices and can even be incorporated
in postcards that can then be accessed by a special reader. The most popular applications are in digital cameras and
portable music players. The two primary methods of interfacing SmartMedia cards to current systems are through
a floppy disk adapter or PCMCIA adapter.
3.1.2
MultiMediaCard (MMC)
The MultiMediaCard is a flash-memory card about the size of a postage stamp and 1,4 mm in thickness. The
specification for MMC is governed by the MultiMediaCard Association (MMCA). The interface for MMC cards is based