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CL-PD6722 数据表(PDF) 39 Page - Cirrus Logic |
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CL-PD6722 数据表(HTML) 39 Page - Cirrus Logic |
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39 / 128 page ![]() CL-PD6710/’22 ISA–to–PC-Card Host Adapters May 1997 39 PRELIMINARY DATA SHEET v3.1 CHIP CONTROL REGISTERS Bit 5 — Ready/Busy* This bit indicates the state of the RDY/-IREQ pin (see page 17) on the card. If the card has been configured for I/O, then this bit will not be valid. Bit 6 — Card Power On This status bit indicates whether power to the card is on. Refer to Table 5-1 on page 34 for details. Bit 7 — VPP Valid This bit indicates the status of the -VPP_VALID pin (see page 15). 0 Card is not ready. 1 Card is ready. 0 Power to the card is not on. 1 Power to the card is on. 0 This status bit indicates a logic high at the -VPP_VALID pin. 1 This status bit indicates a logic low at the -VPP_VALID pin. |
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