Datasheet

20 Zeus 2.5-Inch ATA Solid State Drive
28 I -CSEL CABLE SELECT This internally pulled up signal is used to
configure the drives as the Primary or the
Secondary device. When the pin is grounded,
the device is configured as the Primary device.
When the pin is open, the device is configured as
a Secondary device.
29 I -DACK DMA ACKNOWLEDGE Not used.
30 Ground GND - Ground
31 O INTRQ INTERRUPT REQUEST This is an interrupt request from the controller to
the host, asking for service. This signal is the
active high Interrupt Request to the host.
32 O -IOS16 I/O SELECT 16 Not used.
33 I A1 HOST ADDRESS 1 The address line A1 is used to select one of eight
registers in the controller Task File.
34 I/O -PDIAG After an Executive diagnostic command to
indicate that the Primary device has passed its
diagnostics, this bi-directional open drain signal
is asserted by the Secondary device.
35 I A0 HOST ADDRESS 0 The address lines A0 and A2 are used to select
one of eight registers in the controller Task File.
36 I A2 HOST ADDRESS 2
37 I -CS1 HOST CHIP SELECT 1 The chip select signal used to select the Task
File register.
38 I -CS2 HOST CHIP SELECT 2 The chip select signal used to select the
Alternate Status register and the Device Control
register.
39 I/O -DASP DISK ACTIVE/
SECONDARY PRESENT
This input/output is the Disk Active/Secondary
Present signal in the Primary/Secondary
handshake protocol.
40 Ground GND - Ground
41 - V
CC
Supply Voltage 5V Power Supply
42 - V
CC
Supply Voltage 5V Power Supply
43 Ground GND - Ground
44 - - - No Connection
Pin Pin Type Signal Symbol Signal Name Signal Description