Quantum FIREBALL PLUS AS 10.2 User Manual

ATA Bus Interface and ATA Commands
6-4 Quantum Fireball Plus AS 10.2/20.5/30.0/40.0/60.0 GB AT
Cable Select — 28 This is a signal from the host that allows the drive
to be configured as drive 0 when the signal is 0
(grounded), and as drive 1 when the signal is 1
(high). The drive has a 10kW pull-up resistor on
this signal.
DMA Acknowledge DACK1– IN 29 Used by the host to respond to the drive’s DMARQ
signal. DMARQ signals that there is more data
available for the host.
Ground Ground — 30 Ground between the host system and the drive.
Interrupt Request INTRQ OUT 31 An interrupt to the host system. Asserted only
when the drive microprocessor has a pending
interrupt, the drive is selected, and the host clears
nIEN in the Device Control Register. When nIEN is a
1 or the drive is not selected, this output signal is
in a high-impedance state, regardless of the
presence or absence of a pending interrupt.
INTRQ is deasserted by an assertion of RESET–, the
setting of SRST in the Device Control Register, or
when the host writes to the Command Register or
reads the Status Register.
When data is being transferred in programmed I/O
(PIO) mode, INTRQ is asserted at the beginning of
each data block transfer. Exception: INTRQ is not
asserted at the beginning of the first data block
transfer that occurs when any of the following
commands executes: FORMAT TRACK, Write
Sector, WRITE BUFFER, or WRITE LONG.
16-Bit I/O IOCS16– OUT 32 An open-collector output signal. Indicates to the
host system that the 16-bit data port has been
addressed, and that the drive is ready to send or
receive a 16-bit word. When transferring data in
PIO mode, if IOCS16– is not asserted, D0–D7 are
used for 8-bit transfers; if IOCS16– is asserted, D0–
D15 are used for 16-bit data transfers.
Drive Address Bus A 3-bit, binary-coded address supplied by the host
when accessing a register or the drive’s data port.
Bit 1 DA1 IN 33
Bit 0 DA0 IN 35
Bit 2 DA2 IN 36
Table 6-1
Table 6-1 Table 6-1
Table 6-1
Drive Connector Pin Assignments (J1, Section C) (Continued)
SIGNAL
SIGNALSIGNAL
SIGNAL NAME
NAMENAME
NAME DIR
DIRDIR
DIR PIN
PINPIN
PIN DESCRIPTION
DESCRIPTIONDESCRIPTION
DESCRIPTION

Quantum FIREBALL PLUS AS 10.2 Specifications

General

Brand	Quantum
Model	FIREBALL PLUS AS 10.2
Category	Storage
Language	English