BU8332CKV-M Datasheet, PDF (16/29 Pages) Rohm – Directional Microphone Function

BU8332CKV-M
Digital interface characteristic
1. PCM interface
Parameter
Symbol Conditions
Clock frequency (PCMCLK)
Clock duty
Frame synchronization
signal frequency(PMCFS)
Digital input rise time
Digital input fall time
Transmit / Receive
synchronization signal timing
fPCLK PCMFS=16kHz
fDU -
fFS -
tIR
DVDDIO*0.3→DVDDIO*0.7
PCKCLK, PCMFS, PCMIN
tIF
DVDDIO*0.7→DVDDIO*0.3
PCMCLK, PCMFS, PCMIN
tRS PCMIN setup time (vs. PCMCLK↓)
tRH PCMIN hold time (vs. PCMCLK↓)
tSR PCMCLK↓ vs. PCMFS↑
tSS PCMFS setup time (vs. PCMCLK↓)
tSH PCMFS hold time (vs. PCMCLK↓)
tSO
PCMOUT determined time
(vs. PCMFS↑)
tDO
PCMOUT determined time
(vs. PCMCLK↑)
Min
256
40
15.992
-
-
20
0
20
20
20
-
-
Limits
Typ
-
16
-
-
-
-
-
-
-
-
-
Unit
Min
2048 kHz
60
%
16.008 kHz
40
ns
40
ns
-
ns
-
ns
-
ns
-
ns
-
ns
30
ns
30
ns
1/f_PCLK
PCMCLK
PCMFS
PCMIN
PCMOUT
t_SR
t_SS
t_SH
t_DO
t_SO
t_RS
t_RH
MSB
MSB
t_IF
t_IR
1/f_FS
LSB
LSB
Figure 29 Timing of PCM long frame interface
* The accuracy of the clock
Make sure to use below 100ppm accuracy for PCM interface clock PCMCLK and master clock MCLK. In case more than
100ppm oscillate is in use, output signal may not work properly.
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TSZ22111・15・001
16/26
TSZ02201-0V1V0C104570-1-2
2014.10.31 Rev.002