Quantum FIREBALL PLUS AS 10.2 User Manual

ATA Bus Interface and ATA Commands
Quantum Fireball Plus AS 10.2/20.5/30.0/40.0/60.0 GB AT 6-5
Passed Diagnostics PDIAG– I/O 34 Drive 0 (Master) monitors this Drive 1 (Slave) open-
collector output signal, which indicates the result
of a diagnostics command or reset. The drive has a
10K pull-up resistor on this signal.
Following the receipt of a power-on reset,
software reset, or RESET– drive 1 negates PDIAG–
within 1 ms. PDIAG– indicates to drive 0 that drive
1 is busy (BSY=1). Then, drive 1 asserts PDIAG–
within 30 seconds, indicating that drive 1 is no
longer busy (BSY=0) and can provide status
information. Following the assertion of PDIAG–,
drive 1 is unable to accept commands until drive 1
is ready (DRDY=1)—that is, until the reset
procedure for drive 1 is complete.
Following the receipt of a valid EXECUTE DRIVE
DIAGNOSTIC command, drive 1 negates PDIAG–
within 1 ms, indicating to drive 0 that it is busy
and has not yet passed its internal diagnostics. If
drive 1 is present, drive 0 waits for drive 1 to assert
PDIAG– for up to 5 seconds after the receipt of a
valid EXECUTE DRIVE DIAGNOSTIC command.
Since PDIAG– indicates that drive 1 has passed its
internal diagnostics and is ready to provide status,
drive 1 clears BSY prior to asserting PDIAG–.
If drive 1 fails to respond during reset
initialization, drive 0 reports its own status after
completing its internal diagnostics. Drive 0 is
unable to accept commands until drive 0 is ready
(DRDY=1)—that is, until the reset procedure for
drive 0 is complete.
Chip Select 0 CS1FX– IN 37 Chip-select signal decoded from the host address
bus. Used to select the host-accessible Command
Block Registers.
Chip Select 1 CS3FX– IN 38 Chip select signal decoded from the host address
bus. Used to select the host-accessible Control
Block Registers.
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