PCI1031 Datasheet, PDF (61/100 Pages) Texas Instruments – PCI-TO-PC CARD16 CONTROLLER UNIT

PCI1031
PCI-TO-PC CARD16 CONTROLLER UNIT
SCPS008B – FEBRUARY 1996 – REVISED DECEMBER 1997
ExCA interrupt and general control register (index 03h)
Bit
7
6
5
4
3
2
1
0
Name
ExCA interrupt and general control
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Default
0
0
0
0
0
0
0
0
Register: ExCA interrupt and general control
Type:
Read/write (see individual bit descriptions)
Offset:
CardBus socket address + 803h; Card A ExCA offset 03h
Card B ExCA offset 43h
Default: 00h
Description: This register controls interrupt routing for I/O interrupts, as well as PC Card resets and
card types. Refer to Table 27 for a complete description of the register contents.
Table 27. ExCA Interrupt and General Control Register (Index 03h)
BIT TYPE
FUNCTION
Card ring indicate enable. Bit 7 enables the ring indicate function of BVD1/RI. Bit 7 is encoded as:
7
R/W
0 = Ring indicate is disabled (default).
1 = Ring indicate is enabled.
Card reset. Bit 6 controls the PC Card RESET signal and allows host software to force a card reset. Bit 6 is encoded as:
6
R/W
0 = RESET signal is asserted (default).
1 = RESET signal is deasserted.
Card type. Bit 5 indicates the PC Card type. Bit 5 is encoded as:
5
R/W
0 = Memory PC Card is installed (default).
1 = I/O PC Card is installed.
PCI interrupt-CSC routing enable bit. When bit 4 is set high and the PCI interrupt bit in the device control register (see
device control register) is enabled, the card status-change interrupts are routed to the PCI interrupt for the socket (INTA
or INTB). When low, the card status-change interrupts are routed using bits 7–4 in the ExCA card status-change interrupt
4
R/W
configuration register (see ExCA card status-change interrupt configuration register). To use PCI interrupt-CSC routing,
the ISA IRQ signaling method must be enabled (bits 2–1 of the device control register, offset 92h must not be 0). Bit 4
is encoded as:
0 = CSC interrupts routed by ExCA registers (default)
1 = CSC interrupts routed to PCI interrupts
Card interrupt select for 16-bit I/O PC Card interrupts. Bits 3–0 select the interrupt routing for I/O PC Card interrupts. This
field is encoded as:
0000 = No interrupt routing (default)
0001 = IRQ1 enabled†
0010 = SMI enabled ^†
0011 = IRQ3 enabled
0100 = IRQ4 enabled
3–0
R/W
0101 = IRQ5 enabled
0110 = IRQ6 enabled†
0111 = IRQ7 enabled
1000 = IRQ8 enabled†
1001 = IRQ9 enabled
1010 = IRQ10 enabled
1011 = IRQ11 enabled
1100 = IRQ12 enabled
1101 = IRQ13 enabled†
1110 = IRQ14 enabled
1111 = IRQ15 enabled
† _{Valid when the serialized interrupt scheme is selected in the TI extension registers. There is no dedicated pin for these interrupts.}
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