AK7755EN_16 Datasheet, PDF (33/109 Pages) Asahi Kasei Microsystems – DSP with Mono ADC Stereo CODEC + Mic/Lineout Amp

[AK7755]
CONT02: Serial Data Format, JX1, 0 Setting
W R Name D7
D6 D5
D4
D3
D2
D1 D0 Default
C2h 42h CONT02 TDM256 BCKP LRIF[1] LRIF[0] TDM
TDM
JX1E JX0E 00h
MODE[1] MODE[0]
D7: TDM256, TDM Select
0: Normal Interface (default)
1: TDM Interface
BICK is fixed to 256fs. Set BITFS[1:0] bits = 3h (CONT01: D5, D4). Format is selected by
LRIF[1:0] bits setting (CONT02: D5, D4). In this mode, CKM mode 5(CONT00: D6-D4) is not
available. TDM256 bit cannot be set to “1” when LRDOWN bit (CONT00: D6) = “1”. In TDM
mode, a 96kHz sampling frequency is not available. DFS[2:0] bits (CONT00: D2-D0) setting
must be lower than 5h (48kHz).
D6: BCKP BICK Edge Select
BCKP bit BICK edge referenced to LRCK edge
0
falling (FE)
1
rising (RE)
(default)
D5, D4: LRIF[1:0] LRCK I/F Format
Mode LRIF[1:0]bit
Digital I/F Format
0
00
Standard (MSB justified/ LSB justified) (default)
1
01
I²S Compatible
2
10
PCM Short Frame
3
11
PCM Long Frame
In standard format mode, MSB justified and 24/20/16 bit LSB justified formats are selectable by DIF1
bits (CONT06: D2-D0), DIF2 bits (CONT03: D7, D6), DIFDA bits (CONT06: D5, D4), DOF1 bits
(CONT07: D2-D0), DOF2 bits (CONT03: D5, D4), DOF3 bits (CONT07: D5, D4), and DOF4 bits
(CONT07: D7, D6). In other modes, MSB justified format should be selected by DIF1-2 bits, DAF bit
and DOF1-4 bits.
D3, D2: TDMMODE[1:0] DSPDIN3, DSPDIN4 Input Source Select (Valid when TDM256bit = “1”)
Mode
TDMMODE
[1:0]
DSPDIN4 Lch
DSPDIN4 Rch
DSPDIN3 Lch
DSPDIN3 Rch
0
00
SDIN1 SLOT7 SDIN1 SLOT8
SDIN1 SLOT5
SDIN1 SLOT6 (default)
1
01
SDOUTAD Lch SDOUTAD Rch
SDIN1 SLOT5
SDIN1 SLOT6
2
10
SDOUTAD Lch SDOUTAD Rch SDOUTAD2 Lch SDOUTAD2 Rch
3
11
N/A
N/A
N/A
N/A
D1: JX1E External Conditional Jump1 Enable
0: JX1 is invalid (default)
1: JX1 is valid
D0: JX0E External Conditional jump0 Enable
0: JX0 is invalid (default)
1: JX0 is valid
014006643-E-00
- 33 -
2014/10