CL-PD6833 Datasheet, PDF (81/216 Pages) Cirrus Logic – PCI-to-CardBus Host Adapter

CL-PD6833
PCI-to-CardBus Host Adapter
Bit 5 — CardBus PC Card
This bit sets the CardBus PC Card bit in the Present State register. If a card is installed in the
socket, writes to this bit are ignored.
Bit 7 — Not a Card
This bit sets the Not a Card bit in the Present State register. If a card is installed in the socket,
writes to this bit are ignored.
Bit 8 — Data Lost
This bit causes the Data Lost bit to be set in the Present State register.
Bit 9 — Bad V_CC Request
This bit causes the Bad V_CC Request bit in the Present State register to be set.
Bit 10 — 5-V Card
This bit causes the 5-V Card bit in the Present State register to be set. Writes to this bit disable
the CL-PD6833’s ability to power up the socket. To change the voltage of a card, after forcing this
bit, the CL-PD6833 must either receive a RST# or retest the card’s supported voltages. The latter
can be accomplished by forcing the CV Test bit (bit 14 in this register). This is necessary to prevent
software from applying an incorrect voltage to the PC Card.
Bit 11 — 3.3-V Card
This bit causes the 3.3-V Card bit in the Present State register to be set. Writes to this bit disables
the CL-PD6833’s ability to power up the socket. To change the voltage of a card, after forcing this
bit, the CL-PD6833 must either receive a RST# or retest the card’s supported voltages. The latter
can be accomplished by forcing the CV Test bit (bit 14 in this register). This is necessary to prevent
software from applying an incorrect voltage to the PC Card.
Bit 12 — X-V Card
This bit causes the X-V Card bit in the Present State register to be set. Writes to this bit disables
the CL-PD6833’s ability to power up the socket. To change the voltage of a card, after forcing this
bit, the CL-PD6833 must either receive a RST# or retest the card’s supported voltages. The latter
can be accomplished by forcing the CV Test bit (bit 14 in this register). This is necessary to prevent
software from applying an incorrect voltage to the PC Card.
Bit 13 — Y-V Card
This bit causes the Y-V Card bit in the Present State register to be set. Writes to this bit disables
the CL-PD6833’s ability to power up the socket. To change the voltage of a card, after forcing this
bit, the CL-PD6833 must either receive a RST# or retest the card’s supported voltages. The latter
can be accomplished by forcing the CV Test bit (bit 14 in this register). This is necessary to prevent
software from applying an incorrect voltage to the PC Card.
Bit 14 — CV Test
This bit causes the controller to test the VS and CCD lines to determine card type and voltages
supported. This test is run automatically when a new card is inserted.
Bits 31:15 — Reserved
June 1998
ADVANCE DATA BOOK v0.3
81
CARDBUS REGISTERS