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MOPSlcdGX1 Product Manual
14.3.3 D[0:15]
Input / output
16-bit bi-directional data bus between the host and the drive. The lower eight bits,
D0:D7, are used for register and error-correction code (ECC) access. All 16 bits are used
for data transfers.
14.3.4 IOW#
Input low active
Write strobe, the rising edge of which clocks data from the host data bus, D0:D15, into a
register of the chipDISK.
14.3.5 IOR#
Input low active
Read strobe, which when low enables data from a register of the chipDISK onto the host
data bus, D0:D15.
14.3.6 IRQ
Output tri state
Interrupt to the host system.
The interrupt is enabled only when:
• chipDISK is selected
• Host activates the —IEN bit as active high
• Drive is not selected
This output is in a high impedance state regardless of the state of the IRQ bit. The
interrupt is set when the IRQ bit is set by the chipDISK. IRQ is reset to zero by a host
read of the status register or a write to the command register.
14.3.7 IOCS16#
Output tri state
Indication to the host system that the 16 bit data register has been addressed and that the
chipDISK is prepared to send or receive a 16-bit data word.
Kontron Embedded Modules
chipDISK-IDE Interface
29
Revision 1.3
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