ISD94100 Series Technical Reference Manual
Sep 9, 2019
Page
870
of 928
Rev1.09
IS
D
9
410
0
S
ER
IE
S
T
E
C
HN
ICA
L
RE
F
E
RE
NCE
M
AN
U
AL
Data on Falling Clock Edge of DMIC_DAT0 pin
Data on Rising Clock Edge of DMIC_DAT0 pin
N
N+1
0
0
DMIC_CTL[9:8] = 00, DMIC_CTL[3:0] = 1111
23
23
Redundant bits
Redundant bits
Data on Falling Clock Edge of DMIC_DAT1 pin
Data on Rising Clock Edge of DMIC_DAT1 pin
N+2
N+3
0
0
23
23
Redundant bits
Redundant bits
Data on Rising Clock Edge of DMIC_DAT0 pin
Data on Falling Clock Edge of DMIC_DAT0 pin
N
N+1
0
0
DMIC_CTL[9:8] = 11, DMIC_CTL[3:0] = 1111
23
23
Redundant bits
Redundant bits
Data on Rising Clock Edge of DMIC_DAT1 pin
Data on Falling Clock Edge of DMIC_DAT1 pin
N+2
N+3
0
0
23
23
Redundant bits
Redundant bits
Data on Rising Clock Edge of DMIC_DAT1 pin
Data on Falling Clock Edge of DMIC_DAT1 pin
N
N+1
0
DMIC_CTL[9:8] = 10, DMIC_CTL[3:0] = 1100
23
23
Redundant bits
Redundant bits
0
Data on Falling Clock Edge of DMIC_DAT0 pin
N
0
DMIC_CTL[9:8] = 00, DMIC_CTL[3:0] = 0001
23
Redundant bits
Data on Falling Clock Edge of DMIC_DAT1 pin
N
0
DMIC_CTL[9:8] = 10, DMIC_CTL[3:0] = 1000
23
Redundant bits
Data on Falling Clock Edge of DMIC_DAT0 pin
Data on Rising Clock Edge of DMIC_DAT0 pin
N
N+1
0
DMIC_CTL[9:8] = 00, DMIC_CTL[3:0] = 0011
23
23
Redundant bits
Redundant bits
0
Figure 6.19-5 DMIC FIFO Contents for Various Settings
6.19.5.6 Peripheral DMA Request
Normal use of the DMIC is with PDMA. In this mode DMIC requests PDMA service whenever there
is space in FIFO. PDMA channel will copy data from a streaming buffer to the DMIC and alert the
CPU when buffer is empty. In this way an entire buffer of data can be sent to DMIC without any
CPU intervention.
