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4-38 C156-E227-01EN
Table 4.32 FR register setting value
Setting
value
Function Default
value
02 Enables the write cache. *
03 Supports data transfer depending on the value of the SC register. See Table
4.33.
31 Disables the media status notification function. *
55 Disables the read ahead cache.
5D Enables the interrupt signal to release processing of the Overlap command
after the signal is received. (This request is ignored.)
5E Enables the DRQ interrupt signal of the SERVICE command. (This request
is ignored.)
66 Does not enable a software reset to reset different setting values to the power-
on default values. (The media status notification function is reset normally.)
*
82 Disables the write cache.
95 Enables the media status notification function.
AA Enables the read ahead cache. *
CC Returns various setting values to the power-on default value by software
reset.
DD Enables the interrupt signal to release processing of the Overlap command
after the signal is received. (This request is ignored.)
*
DE Enables the DRQ interrupt signal of the SERVICE command. (This request
is ignored.)
*