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SPD6722QCCE Datasheet(PDF) 76 Page - Intel Corporation |
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SPD6722QCCE Datasheet(HTML) 76 Page - Intel Corporation |
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76 / 138 page  PD6710/’22 — ISA-to-PC-Card (PCMCIA) Controllers 76 Datasheet Bit 1 — Speaker Is LED Input This bit changes the function of the BVD2/-SPKR/-LED pin (see Table 2 on page 20) from digital speaker input to disk status LED input. When in I/O Card Interface mode or ATA mode, setting this bit to ‘1’ reconfigures the BVD2/-SPKR/-LED input pin to serve as a -LED input from the socket. Note: This bit should be set to ‘0’ if in Memory Card Interface mode. Bit 3 — A21 In ATA mode, the value in this bit is applied to the ATA A21 pin and is vendor-specific. Certain ATA drive vendor-specific performance enhancements beyond the PC Card Standard may be controlled through use of this bit. This bit has no hardware control function when not in ATA mode. Bit 4 — A22 In ATA mode, the value in this bit is applied to the ATA A22 pin and is vendor-specific. Certain ATA drive vendor-specific performance enhancements beyond the PC Card Standard may be controlled through use of this bit. This bit has no hardware control function when not in ATA mode. Bit 5 — A23/VU In ATA mode, the value in this bit is applied to the ATA A23 pin and is vendor-specific. Certain ATA drive vendor-specific performance enhancements beyond the PC Card Standard may be controlled through use of this bit. This bit has no hardware control function when not in ATA mode. Bit 6 — A24/M/S* In ATA mode, the value in this bit is applied to the ATA A24 pin and is vendor-specific. Certain ATA drive vendor-specific performance enhancements beyond the PC Card Standard may be controlled through use of this bit. This bit has no hardware control function when not in ATA mode. Bit 7 — A25/CSEL In ATA mode, the value in this bit is applied to the ATA A25 pin and is vendor-specific. Certain ATA drive vendor-specific performance enhancements beyond the PC Card Standard may be controlled through use of this bit. This bit has no hardware control function when not in ATA mode. 0 Normal operation. 1 The PC Card -SPKR pin will be used to drive IRQ12 if Drive LED Enable (see “Bit 4 — Drive LED Enable” on page 73) is set. |
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