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Signal description
Pin
Type
Signal
Name
Pin Num
Signal
Name
Pin
Type
Signal description
This internally pulled up signal is
used to configure the drives as the
This is IORDY from the card
from the drive to the host
O
IORDY
-
DDMARDY
DSTROBE
27
28
CSEL
I
Primary or the Secondary device.
When the pin is grounded, the
device is configured as the Primary
device (master).
When the pin is open, the device is
configured as a Secondary device
(slave).
Not used.
I
-DMACK
29
30
GND
Ground
This is an interrupt request
from the drive to the host,
asking for service. This signal
O
INTRQ
31
32
(IOCS16)
O
Not used.
is the active high Interrupt
Request to the host.
After an Executive diagnostic
command to indicate that the
The address lines A1 and A0
are used to select one of eight
registers in the controller Task
File.
I
I
A1
A0
33
35
34
36
-PDIAG
A2
I/O
I
Primary device has passed its
diagnostics, this bi-directional
open drain signal is asserted by the
Secondary device.
The address line A2 is used to select
one of eight
registers in the controller Task File.
The chip select signal used to
select the Task File register.
I
-CS0
37
38
-CS1
I
The chip select signal used to select
the Alternate Status register and
the Device Control register.
This input/output is the Disk
Active/Secondary Present
signal in the Primary/
O
-DASP
39
40
GND
Ground
Secondary handshake
protocol.
5V Power Supply
Ground
VCC
GND
41
43
42
44
VCC
NC
5V Power Supply
5.2 Master-Slave configuration
The SSD can be configured as IDE Master or Slave Device with a Jumper beside the 44-pin connector
(pins A, B, C, and D).
Table 12: Master Slave configuration
Jumper
No Jumper
A to C
C to D
A to B
B to D
Device configuration
Master
Slave
Cable Select*
*) The Device is master, if it is connected at the end,
or slave, if it is connected at the middle connector of a standard IDE cable
Swissbit AG
Industriestrasse 4
Swissbit reserves the right to change products or specifications without notice.
Revision: 1.00
CH-9552 Bronschhofen
Switzerland
www.swissbit.com
industrial@swissbit.com
P-120_data_sheet_PA-QxBO_Rev100.doc
Page 10 of 76
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