AK4650 Datasheet, PDF (64/86 Pages) Asahi Kasei Microsystems – 16Bit ΔΣ CODEC with MIC/HP/SPK-AMP & TSC

[AK4650]
Table 54 shows the relationship of bit 14&13 and the Read/Write operation.
Bit 15
Valid Frame
1
1
1
1
Bit 14: Slot1 Valid Bit Bit 13: Slot 2 Valid Bit
(Command Address)
(Command Data)
Read/Write Operation
1
1
Read/Write (Normal Operation)
0
1
Ignore
1
0
Read: Normal Operation
Write: Ignore
0
0
Ignore
Table 54. AK4650 Addressing: Slot 0 Tag Bits
[Slot 1]: Command Address Port
Slot1 gives the address of the command data, which is given in the slot 2. The AK4650 has 30 valid registers of 16bit data.
See “Mixer Registers”.
BITCLK
SDATAOUT
Slot 0
Bit19 Bit18 Bit17 Bit16 Bit15 Bit14 Bit13 Bit12 Bit11 Bit10 Bit9
“1/0” “1/0” “1/0” “1/0” “1/0” “1/0” “1/0” “1/0” “0” “0” “0”
Slot 1
Command Address Port
Bit2 Bit1 Bit0
“0” “0” “0”
Bit19 Bit18 Bit17 Bit1
6
Slot 2
Figure 49. Slot 1
Bit 19:
Read/Write command (1bit; “1”=read, “0”=write)
Bit 18-12: Control Register Index (7bit; see “Mixer Registers” for the detail)
Bit 11-0: Reserved (12bit; “0”)
Bit 18 of this slot 1 is equivalent to the most significant bit of the index register address.
The AK4650 ignores bit 11-0. These bits will be reserved for future enhancement and must be stuffed with “0” by the
AC’97 controller.
[Slot 2]: Command Data Port
BITCLK
SDATAOUT
Slot 1
Bit19 Bit18 Bit17 Bit16 Bit15 Bit14 Bit13 Bit12 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Bit19 Bit18 Bit17 Bit16
“1/0” “1/0” “1/0” “1/0” “1/0” “1/0” “1/0” “1/0”
Slot 2
Command Data Port
“1/0” “1/0” “0” “0” “0” “0”
Slot 3
Figure 50. Slot 2
Bit19-4:
Bit3-0:
Control Register Write Data (16bit)
(If bit 19 of slot 1 is “1”, all bit19-4 should be “0”.)
Reserved (4bit; “0”)
If bit 19 in slot 1 is “0”, the AC’97 controller must output Command Data Port data in slot 2 of the same frame. If the
bit 19 in slot 1 is “1”, the AK4650 will ignore any Command Data Port data in slot 2.
Bit19 of this slot 2 is equivalent to D15 bit of mixer register value.
MS0502-E-01
- 64 -
2007/04