
Functional DescriptionZeus SSD Functional Blocks
Table 4. ATA (IDE) Connector Pinout Configuration (Continued)
Pin | Pin Type | Signal Symbol | Signal Name | Signal Description | ||
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27 | I | IORDY | I/O READY | Not used, and pulled up to Vcc through a | ||
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| 4.7k ohm resistor. | ||
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28 | I | CABLE SELECT | This internally pulled up signal is used to | |||
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| configure the drives as the Master or the | ||
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| Slave device. When the pin is grounded, the | ||
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| device is configured as a Master. When the | ||
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| pin is open, the device is configured as a | ||
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| Slave. | ||
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29 | I | DMA ACKNOWLEDGE | Not used | |||
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30 | Ground | GND | — | Ground | ||
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31 | O | INTRQ | INTERRUPT REQUEST | This is an interrupt request from the | ||
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| controller to the host, asking for service. | ||
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| This signal is the active high Interrupt | ||
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| Request to the host. | ||
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32 | O | I/O SELECT 16 | Not used | |||
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33 | I | A1 | HOST ADDRESS 1 | This address line (A1) is used to select one | ||
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| of eight registers in the controller Task File. | ||
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34 | I/O |
| After an Executive diagnostic command to | |||
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| indicate to the Master it has passed its | ||
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| diagnostics, this | ||
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| signal is asserted by the Slave. | ||
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35 | I | A0 | HOST ADDRESS 0 | These address lines (A0 and A2) are used to | ||
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| select one of eight registers in the controller | ||
36 | I | A2 | HOST ADDRESS 2 | |||
Task File. | ||||||
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37 | I | HOST CHIP SELECT 1 | The chip select signal used to select the | |||
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| Task File register. | ||
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38 | I | HOST CHIP SELECT 2 | The chip select signal used to select the | |||
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| Alternate Status register and the Device | ||
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| Control register. | ||
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39 | I/O | DISK ACTIVE/SLAVE | This input/output is the Disk Active/Slave | |||
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| PRESENT | Present signal in the Master/Slave | ||
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| handshake protocol. | ||
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40 | Ground | GND | — | Ground | ||
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41* | — | VCC | Supply Voltage | 5V power supply | ||
42* | — | VCC | Supply Voltage | 5V power supply | ||
43* | Ground | GND | — | Ground | ||
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44* | — | — | — | No connection | ||
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* Applies to |
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16 |
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| Zeus Ultra DMA Solid State Drives |