MAX98091 Datasheet, PDF (87/174 Pages) Maxim Integrated Products – Ultra-Low Power Stereo Audio Codec

MAX98091
Ultra-Low Power Stereo Audio Codec
Table 14. Secondary Record Path Configuration
ADDRESS: 0xC2
BIT
NAME
TYPE POR
DESCRIPTION
7
—
—
——
6
—
—
——
5
—
—
——
Secondary Record Path Zero Padding Configuration
4
ZEROPAD
R/W 1
0: TDM data samples are repeated N times, where N is the division
rate for the secondary record path set by DMIC34_SRDIV[2:0]
3
—
—
—
1: TDM data samples are interleaved with zero samples
—
Secondary Record Path Sample Rate Configuration
2
SRDIV[2:0]
R/W 0
000:
001:
010:
011:
f_{S_DMIC2} = f_{S_DMIC1}
f_{S_DMIC2} = f_{S_DMIC1/}2
f_{S_DMIC2} = f_{S_DMIC1/}3
f_{S_DMIC2} = f_{S_DMIC1/}4
100:
101:
110:
111:
f_{S_DMIC2} = f_{S_DMIC1/}6
Reserved
Reserved
Reserved
LRCLK (FRAME
SYNC PULSE)
SDOUT DATA
TDM MODE ENABLED (SLOT 1 = DMIC1L, SLOT2 = DMIC1R, SLOT3 = DMIC2L, SLOT4 = DMIC2R),
CONDITIONS: 16-BIT WORDS, fDMIC1 = 48kHz/fDMIC2 = 16kHz (3:1), DMIC2 ZERO PADDING DISABLED
DMIC1: FRAME 1 DMIC1: FRAME 2 DMIC1: FRAME 3 DMIC1: FRAME 4 DMIC1: FRAME 5 DMIC1: FRAME 6 DMIC1: FRAME 7
ETC.
DMIC2: FRAME 1 DMIC2: REPEAT 1 DMIC2: REPEAT 1 DMIC2: FRAME 2 DMIC2: REPEAT 2 DMIC2: REPEAT 2 DMIC2: FRAME 3
64 BCLK PERIODS
PER SYNC FRAME
DM1 DM1 DM2 DM2 DM1 DM1 DM2 DM2 DM1 DM1 DM2 DM2 DM1 DM1 DM2 DM2 DM1 DM1 DM2 DM2 DM1 DM1 DM2 DM2 DM1 DM1 DM2 DM2
L1 R1 L1 R1 L2 R2 L1 R1 L3 R3 L1 R1 L4 R4 L2 R2 L5 R5 L2 R2 L6 R6 L2 R2 L7 R7 L3 R3
LRCLK (FRAME
SYNC PULSE)
SDOUT DATA
TDM MODE ENABLED (SLOT 1 = DMIC1L, SLOT2 = DMIC1R, SLOT3 = DMIC2L, SLOT4 = DMIC2R),
CONDITIONS: 16-BIT WORDS, fDMIC1 = 48kHz/fDMIC2 = 16kHz (3:1), DMIC2 ZERO PADDING ENABLED
DMIC1: FRAME 1 DMIC1: FRAME 2 DMIC1: FRAME 3 DMIC1: FRAME 4 DMIC1: FRAME 5 DMIC1: FRAME 6 DMIC1: FRAME 7
ETC.
DMIC2: FRAME 1 DMIC2: ZEROPAD DMIC2: ZEROPAD DMIC2: FRAME 2 DMIC2: ZEROPAD DMIC2: ZEROPAD DMIC2: FRAME 3
64 BCLK PERIODS
PER SYNC FRAME
DM1 DM1 DM2 DM2 DM1 DM1 ^{ZERO CODE} DM1 DM1 ^{ZERO CODE} DM1 DM1 DM2 DM2 DM1 DM1 ^{ZERO CODE} DM1 DM1 ^{ZERO CODE} DM1 DM1 DM2 DM2
L1 R1 L1 R1 L2 R2
L3 R3
L4 R4 L2 R2 L5 R5
L6 R6
L7 R7 L3 R3
Figure 8. Secondary Record Path Sample Rate Division
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