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ECB-862/862L
ECB-862/862L User’s Manual 29
SDDACK# Secondary DMA Acknowledge. This signal directly drives the IDE device DMACK# signal. It
is asserted by PIIX4 to indicate to IDE DMA slave devices that a given data transfer cycle
(assertion of SDIOR# or SDIOW#) is a DMA data transfer cycle. This signal is used in
conjunction with the PCI bus master IDE function. It is not associated with any AT compatible
DMA channel.
If the IDE signals are configured for Primary and Secondary, this signal is connected to the
corresponding signal on the Secondary IDE connector.
If the IDE signals are configured for Primary Master and Primary Slave, these signals are
used for the Primary Slave connector.
PDDACT# Primary Disk Act. Signal from Primary IDE device indicating Primary IDE device activity. The
signal level depends on the hard disk type, normally active low.
SDDACT# Secondary Disk Act. Signal from Secondary IDE device indicating Secondary IDE device
activity. The signal level depends on the hard disk type, normally active low.
RESET# IDE Reset. This signal resets all the devices that are attached to the IDE interface.
IRQ14/15 Interrupt line from hard disk. Connected directly to PC-AT bus.
3.9.6 Floppy Connector (CN2)
Signal PIN Signal
GND 1 2 RWC#
GND 3 4 NC
NC 5 6 DRVDEN1#
GND 7 8 INDEX#
GND 9 10 MOA#
GND 11 12 DSB#
GND 13 14 DSA#
GND 15 16 MOB#
GND 17 18 DIR#
GND 19 20 STEP#
GND 21 22 WD#
GND 23 24 WE#
GND 25 26 TRAK0#
GND 27 28 WPT#
GND 29 30 RDATA#
GND 31 32 SIDE1#
GND 33 34 DSKCHG#