| IDE signal connector |
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| Notes: |
- Pin position 20 is blank.
- Pin position 47 through 50 are used for drive address setting.
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Signal definition |
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| The pin assignments of interface signals are listed as follows: |
Pin Signal Name I/O Pin Signal Name I/O
01 -HRESET I 02 GND
03 HD07 I/O 04 HD08 I/O
05 HD06 I/O 06 HD09 I/O
07 HD05 I/O 08 HD10 I/O
09 HD04 I/O 10 HD11 I/O
11 HD03 I/O 12 HD12 I/O
13 HD02 I/O 14 HD13 I/O
15 HD01 I/O 16 HD14 I/O
17 HD00 I/O 18 HD15 I/O
19 GND (20) Key
21 (Resv) 22 GND
23 -HI0W I 24 GND
25 -HI0R I 26 GND
27 IORDY O 28 CSEL I
29 (Resv) 30 GND
31 HIRQ O 32 -HIOCS16 O
33 HA01 I 34 -PDIAG I/O
35 HA00 I 36 HA02 I
37 -HCSO I 38 -HCS1 I
39 -DASP I/O 40 GND
41 +5 V logic PWR 42 +5 V motor PWR
43 GND 44 (Resv)
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Notes: |
- 'O' designates an output from the drive.
- 'I' designates an input to the drive.
- 'I/O' designates an input/output common.
- 'PWR' designates a power supply to the drive.
- '(Resv)' designates reserved pins which must be left unconnected.
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| +5 volt power supply |
There are two input pins for +5 volt power supply, '+5V logic' and '+5V motor'. '+5V logic' is connected to the internal logic circuits and '+5V motor' is connected to the spindle motor
and motor driver. |
It is possible to turn on and off '+5V logic' by an external switch circuit to reduce power consumption to the least possible. In this mode, a voltage drop out due to the motor spin up
current can be reduced by connecting '+5V motor' line into the system power source directly. |
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