PCI4410 Datasheet, PDF (88/201 Pages) Texas Instruments – PC Card and OHCI Controller

4.34 Card Control Register
The card control register is provided for PCI1130 compatibility. RI_OUT is enabled through this register. See
Table 4–11 for a complete description of the register contents.
Bit
7
6
5
Name
Type
R/W
R/W
R/W
Default
0
0
0
4
3
Card control
R
R
0
0
2
1
0
R/W
R/W
R/C
0
0
0
Register:
Type:
Offset:
Default:
Card control
Read-only, Read/Write, Read/Write to Clear
91h
00h
Table 4–11. Card Control Register
BIT
SIGNAL
TYPE
FUNCTION
Ring indicate output enable.
7
RIENB
R/W
0 = Disables any routing of RI_OUT signal (default)
1 = Enables RI_OUT signal for routing to the RI_OUT/PME terminal, when bit 0 (RIMUX) in the
system control register (see Section 4.29) is set to 0, and for routing to MFUNC2 or MFUNC4.
6
ZVENABLE
R/W
Compatibility ZV mode enable. When set, the PC Card socket interface ZV terminals enter a
high-impedance state. This bit defaults to 0.
ZV output port enable. When bit 5 is set, the ZV output port is enabled. If bit 6 (ZVENABLE) is set, then
ZV
ZV data from the PC Card interface is routed to the ZV output port. Otherwise, the ZV output port drives
5
PORT_ENABLE ^{R/W a stable 0 pattern on all pins.}
When bit 5 is not set, the ZV output port pins are placed in a high-impedance state. Default is 0.
4–3
RSVD
R Reserved. Bits 4 and 3 return 0 when read.
2
AUD2MUX
R/W
CardBus audio-to-IRQMUX. When set, the CAUDIO CardBus signal is routed to the corresponding
multifunction terminal which may be configured for CAUDPWM.
Speaker out enable. When bit 1 is set, SPKR on the PC Card is enabled and is routed to SPKROUT.
The SPKROUT terminal drives data only when the socket’s SPKROUTEN bit is set. This bit is encoded
1
SPKROUTEN
R/W as:
0 = SPKR to SPKROUT not enabled (default)
1 = SPKR to SPKROUT enabled
Interrupt flag. Bit 0 is the interrupt flag for 16-bit I/O PC Cards and for CardBus cards. Bit 0 is set when
0
IFG
R/C
a functional interrupt is signaled from a PC Card interface. Write back a 1 to clear this bit.
0 = No PC Card functional interrupt detected (default)
1 = PC Card functional interrupt detected
4–22