Host Interface (31 Pins) - Marantz SA8260/F1N Service Manual

5. Host Interface (31 pins)

Pin symbols are listed in the order of ATAPI mode, DMA mode
and AV mode. Pull up means that the pin should be pulled up by a
resistor, "0" means low level output, and nc means No Connect.
(1) HCS0 (HOST chip select: input)/nc/nc
This pin is pulled up by a resistor.
ATAPI: Chip select negative logic input signal from the host.
This is connected with the CS1FX pin of the ATAPI interface.
DMA/AV: This pin is not used.
(2) HCS1 (HOST chip select: input)/nc/nc
This pin is pulled up by a resistor.
ATAPI: Chip select negative logic input signal from the host.
This is connected with the CS3FX pin of the ATAPI interface.
DMA/AV: This pin is not used.
(3) HA[2:0] (HOST address: input)/pull up/pull up
ATAPI: Address input signal for selecting internal registers from
the host.
DMA/AV: This pin is not used, and should be pulled up by a
resistor.
(4) XHRD (HOST read: input)/XHRD (HOST read: output)/
XSHDR0 (sector header 0: output)
ATAPI: Strobe negative logic input signal for reading data from
the host.
DMA: Strobe negative logic input signal for reading data to the
host.
AV: Negative logic output signal indicating the lead byte of the
sector.
(5) XHWR (HOST write: input)/XHWR (HOST write: output)/DCK
(data clock: output)
ATAPI: Strobe negative logic input signal for writing data from
the host.
DMA: Strobe negative logic output signal for writing data to the
host.
AV: Clock output for data transfer.
(6) XHAC (HOST DMA acknowledge: input)/HDRQ (HOST DMA
request: input)/REQUEST (request:input)
This pin is pulled up by a resistor.
ATAPI: DMA acknowledge negative logic input signal from the
host.
DMA: DMA request input signal from the host.
AV: Data transfer request input signal.
(7) DASP (drive active/slave present: input/output)/pull up/pull up
ATAPI: Negative logic signal indicating that a slave drive is
present or a drive is active; open drain signal.
DMA/AV: This pin is not used, and should be pulled up by a
resistor.
(8) HDB[F:0] (HOST data bus: input/output)/HDB[F:0] (HOST data
bus: input/output)/7 "0", XVFLAG,
DATA[7:0] ("0", video error fl ag, data: output)
ATAPI/DMA: 16-bit host data bus.
AV: Low level is output from the upper 7 bits. The 8th bit from
the upper side is an error fl ag output signal corresponding to
the lower 8 bits. The lower 8 bits are video data output signals.
(9) HDRQ (HOST DMA request: output)/XHAC (HOST DMA
acknowledge: output)/XACK (acknowledge:output)
ATAPI: DMA data request positive logic output signal to the
host; tri-state signal.
DMA: DMA acknowledge negative logic output signal to the
host.
AV: Data transfer acknowledge negative logic output signal.
(10) HINT (HOST interrupt: output)/pull up/pull up
ATAPI: Interrupt request positive logic output signal to the host;
tri-state signal.
DMA/AV: This pin is not used, and should be pulled up by a
resistor.
(11) XS16 (16-bit data transfer: output)/pull up/pull up
ATAPI: Negative logic signal indicating that a 16-bit data port
has been selected; open drain
signal. This is connected with the IOCS16 pin of the ATAPI
interface.
DMA/AV: This pin is not used, and should be pulled up by a
resistor.
(12) REDY (I/O channel ready: output)/pull up/pull up
ATAPI: Positive logic signal which is negated when a drive is
not ready to respond to a data transfer request; open drain
signal. This is connected with the IORDY pin of the ATAPI
interface.
DMA/AV: This pin is not used, and should be pulled up by a
resistor.
(13) XPDI (passed diagnostics: input/output)/pull up/pull up
ATAPI: Negative logic signal indicating that diagnostics of the
slave drive have been completed; open drain signal. This is
connected with the PDIAG pin of the ATAPI interface.
DMA/AV: This pin is not used, and should be pulled up by a
resistor.
(14) XHRS (HOST reset: input)/nc/nc
ATAPI: Reset negative logic signal from the host; pulled up by
a resistor.
DMA/AV: This pin is not used
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