r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 1324

• Manufacturer Part Number: r8a77850anbg
• Description: Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

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