r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 1323

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

Figure 25.6 Sample Flowchart for Off-Chip Codec Register Read (2)
Assign HACCSDR read value to Data T
Assign HACCSAR read value to Addr
Notes: E2:
Write 0 to RSR.STARY
Write 0 to RSR.STDRY
Clear LoopCnt 2 to 0
WaitLoop_CMDAMT
Send_read_request
Set RegN in CSAR
Addr (R) = RegN?
Data T is returned
Get_codec_data
WaitLoop_RSR
LoopCnt2: Software counter for wait insertion
Addr:
DataT:
Return
Error
Error
No
No
Yes
Loop count required in the target system (13 < E2)
Variable to hold CSAR read value.
Variable to hold CSDR read value.
Yes
Yes
No
Input: RegN (address of the codec register to be read)
Input: RegN (address of the codec register to be read)
E2 < LoopCnt 2
LoopCnt 2 ++
Wait for 5 μs
Error
Error
Error
Yes
Rev.1.00 Jan. 10, 2008 Page 1293 of 1658
No
25. Audio Codec Interface (HAC)
REJ09B0261-0100