Intel ECB-862 Manual De Usuario

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. 

 

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#