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MB86615

IEEE 1394 Bus Controller (for DVC)

Fujitsu 

MB86615

2.6.4 Clearing the ISO Transmission/Reception FIFO Buffer Using the fifo-clr Bit

The ISO transmission/reception FIFO buffer is cleared by setting the fifo-clr bit (bit 4) in the ISO-FIFO control

register (address 0Eh) to “1.” Given below is a timing chart for the isochronous interface when the FIFO buffer

is cleared.

Note that this FIFO buffer clear function is available only when the point-rec bit (bit 7) or length-chk bit (bit 6)

in the ISO-FIFO control register has been set to “1.”

Parameter

IV rise to ILWRE rise

ILWRE negate time

Symbol

tCLR

tWREH

Min.

—

—

Value

Max.

4 tICLK

7 tICLK

Unit

ns

ns

ILWRE

tCLR

tWREH

IV

* : The ISO transmission/reception FIFO buffer is cleared while the ILWRE signal is negated.

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