C156-E142-02EN 4 - 21
4.5 ATA Commands
Table 4.18 lists supported ATA commands.
This section represents ODD registers as shown below.
Cylinders High/Low registers: CY
Sector register: SC
Device/Head register: DH
Sector Number register: SN
Features register: FR
Table 4.18 Command codes and parameters
Protocol
Command name Command Parameters used Section
code FR SC SN CY DH
PI IDENTIFY PACKET DEVICE A1h D 4.5.1
- PACKET A0h y y y D 4.5.2
ND DEVICE RESET 08h D 4.5.3
ND CHECK POWER MODE 98h E5h y D 4.5.4
ND EXECUTE DEVICE DIAGNOSTIC 90h D* 4.5.5
ND GET MEDIA STATU DAh D 4.5.6
ND IDLE IMMEDIATE 98h E5h D 4.5.7
ND NOP 00h y 4.5.8
ND SERVICE (Not supported) A2h D 4.5.9
ND SET FEATURES EFh y y D 4.5.10
ND SLEEP 99h E6h D 4.5.11
ND STANDBY IMMEDIATE 94h E0h D 4.5.12
-- RESERVED: Other codes
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