3.4.4 Function 3 (Flash Media) Subsystem Identification
The subsystem identification register is used for system and option card identification purposes. This register can
be initialized from the serial EEPROM or programmed via the subsystem access register at offset 50h in the PCI
configuration space (see Section 7.22, Subsystem Access Register). See Table 7−15 for a complete description of
the register contents.
The contents of the subsystem access register are aliased to the subsystem vendor ID and subsystem ID registers
at Function 3 PCI offsets 2Ch and 2Eh, respectively. See Table 7−15 for a complete description of the register
contents.
3.4.5 Function 4 SD Host Subsystem Identification
The subsystem identification register is used for system and option card identification purposes. This register can
be initialized from the serial EEPROM or programmed via the subsystem access register at offset 8Ch in the PCI
configuration space (see Section 8.23, Subsystem Access Register). See Table 8−16 for a complete description of
the register contents.
The contents of the subsystem access register are aliased to the subsystem vendor ID and subsystem ID registers
at Function 4 PCI offsets 2Ch and 2Eh, respectively. See Table 8−16 for a complete description of the register
contents.
3.4.6 Function 5 Smart Card Subsystem Identification
The subsystem identification register is used for system and option card identification purposes. This register can
be initialized from the serial EEPROM or programmed via the subsystem access register at offset 50h in the PCI
configuration space (see Section 9.23, Subsystem ID Alias Register). See Table 9−14 for a complete description of
the register contents.
The contents of the subsystem access register are aliased to the subsystem vendor ID and subsystem ID registers
at Function 5 PCI offsets 2Ch and 2Eh, respectively. See Table 9−14 for a complete description of the register
contents.
3.5 PC Card Applications
The PCI6x21/PCI6x11 controller supports all the PC Card features and applications as described below.
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Card insertion/removal and recognition per the PC Card Standard (release 8.1)
Speaker and audio applications
LED socket activity indicators
PC Card controller programming model
CardBus socket registers
3.5.1 PC Card Insertion/Removal and Recognition
The PC Card Standard (release 8.1) addresses the card-detection and recognition process through an interrogation
procedure that the socket must initiate on card insertion into a cold, nonpowered socket. Through this interrogation,
card voltage requirements and interface (16-bit versus CardBus) are determined.
The scheme uses the card-detect and voltage-sense signals. The configuration of these four terminals identifies the
card type and voltage requirements of the PC Card interface.
3−4
TI [ TEXAS INSTRUMENTS ]
