Datasheet

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