PCI1520GHK Datasheet, PDF (124/139 Pages) Texas Instruments – PC Card Controllers

Table 6−4. Socket Present-State Register (Continued)
BIT
SIGNAL
TYPE
FUNCTION
10
5VCARD
5-V card. Bit 10 indicates whether or not the PC Card inserted in the socket supports VCC = 5 V.
R
0 = 5-V VCC is not supported.
1 = 5-V VCC is supported.
Bad VCC request. Bit 9 indicates that the host software has requested that the socket be powered at an
9
BADVCCREQ
R
invalid voltage.
0 = Normal operation (default)
1 = Invalid VCC request by host software
Data lost. Bit 8 indicates that a PC Card removal event may have caused lost data because the cycle did
8
DATALOST
R
not terminate properly or because write data still resides in the PCI1520.
0 = Normal operation (default)
1 = Potential data loss due to card removal
Not a card. Bit 7 indicates that an unrecognizable PC Card has been inserted in the socket. This bit is not
7
NOTACARD
R
updated until a valid PC Card is inserted into the socket.
0 = Normal operation (default)
1 = Unrecognizable PC Card detected
READY(IREQ)//CINT. Bit 6 indicates the current status of READY(IREQ)//CINT at the PC Card interface.
6
IREQCINT
R
0 = READY(IREQ)//CINT low
1 = READY(IREQ)//CINT high
5
CBCARD
R
CardBus card detected. Bit 5 indicates that a CardBus PC Card is inserted in the socket. This bit is not
updated until another card interrogation sequence occurs (card insertion).
4
16BITCARD
R
16-bit card detected. Bit 4 indicates that a 16-bit PC Card is inserted in the socket. This bit is not updated
until another card interrogation sequence occurs (card insertion).
Power cycle. Bit 3 indicates the status of each card powering request. This bit is encoded as:
3
PWRCYCLE
R
0 = Socket powered down (default)
1 = Socket powered up
CCD2. Bit 2 reflects the current status of CCD2 at the PC Card interface. Changes to this signal during
2
CDETECT2
R
card interrogation are not reflected here.
0 = CCD2 low (PC Card may be present)
1 = CCD2 high (PC Card not present)
CCD1. Bit 1 reflects the current status of CCD1 at the PC Card interface. Changes to this signal during
1
CDETECT1
R
card interrogation are not reflected here.
0 = CCD1 low (PC Card may be present)
1 = CCD1 high (PC Card not present)
CSTSCHG. Bit 0 reflects the current status of CSTSCHG at the PC Card interface.
0
CARDSTS
R
0 = CSTSCHG low
1 = CSTSCHG high
6−5