MSM6688 Datasheet, PDF (65/159 Pages) OKI electronic componets – ADPCM Solid-State Recorder IC

Inputting 3-Nibble Commands (CHAN and BLKWR Commands)
WR
(I)
RD
(I)
D0-D3
(I/O)
Status register
BUSY bit
t_DRW
Status output
Command input
(1st nibble)
t_B3
Data input
(2nd nibble)
t_BD
Data input
(3rd nibble)
t_BD