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ATA-Disk Module

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4.0 APPENDIX

4.1 Differences between ATA-Disk Module and ATA/ATAPI-5 Specifications

This section details differences between ADM vs. ATA.

4.1.1 Electrical Differences

4.1.1.1 TTL Compatibility

ADM is not TTL compatible, it is a purely CMOS interface. Refer to Section 2.3.2 of this specification.

4.1.1.2 Pull Up Resistor Input Leakage Current

The minimum pull up resistor input leakage current is 50K ohms rather than the 10K ohms stated in the

ATA specification.

4.1.2 Functional Differences

4.1.2.1 Idle Timer

The Idle timer uses an incremental value of 5 ms, rather than the 5 sec minimum increment value specified in ATA

specifications.

4.1.2.2 Recovery from Sleep Mode

For ADM devices, recovery from sleep mode is accomplished by simply issuing another command to the device.

A hardware or software reset is not required.