Renesas SH7781 - Manual (Page 1324)

25. Audio Codec Interface (HAC)
Rev.1.00 Jan. 10, 2008 Page 1294 of 1658
REJ09B0261-0100
No
No
Yes
WaitLoop_CMDAMT
Notes: E3, E4: Loop count required in the target system
(21 < E3, 21 < E4 < 1000)
LoopCnt3: Software counter for wait insertion
LoopCnt4: Software counter for wait insertion
Write 0 to TSR.CMDAMT
Return
Return
Error
Clear LoopCnt 3 to 0
TSR.CMDAMT = 1
Wait for 1 μs
LoopCnt 3 ++
Yes
E3 < LoopCnt 3
Error
No
No
Yes
WaitLoop_RSR
Write 0 to RSR.STARY
Write 0 to RSR.STDRY
Clear LoopCnt 4 to 0
RSR.STARY = 1 &
RSR.STDRY = 1
Wait for 1 μs
LoopCnt 4 ++
Yes
E4 < LoopCnt 4
Figure 25.7 Sample Flowchart for Off-Chip Codec Register Read (3)