Fujitsu MHY2160BS Command Protocol, Execute Device Diagnostic Initialize Device Parameters, Data

Interface

5.4 Command Protocol

The host should confirm that the BSY bit of the Shadow Block Status register of the device is 0 prior to issue a command. If BSY bit is 1, the host should wait for issuing a command until BSY bit is cleared to 0.

Commands can be executed only when the DRDY bit of the Status register is 1. However, the following commands can be executed even if DRDY bit is 0.

•EXECUTE DEVICE DIAGNOSTIC

•INITIALIZE DEVICE PARAMETERS

Note: Each FIS type is referred to as follows in this section.

FIS (Frame Information Structure) type	Abbreviation
Register - Host to Device	RegHD
Register - Device to Host	RegDH
DMA Active - Device to Host	DMA Active
DMA Setup - Device to Host or Host to Device	DMA Setup
(Bidirectional)
Set Device Bits - Device to Host	SetDB
BIST Active - Bidirectional	BIST Active
PIO Setup - Device to Host	PIO Setup
Data - Host to Device or Device to Host (Bidirectional)	DATA

5-174 C141-E269