BU26154MUV_15 Datasheet, PDF (47/90 Pages) Rohm – Monaural Audio CODEC with Touch Panel Interface

BU26154MUV
Datasheet
RECPLAY [2:0]
This bit controls start / stop of the recording/playback operation of the LSI and it is feasible by recording and reproduction at
the same time and monitor recording data from the reproduction course, and please refer to "state transition item about the
recording reproduction control" for the transition between recording/playback states again. Transition between other states
is prohibited. Please move to the next movement once by all means after having let recording/playback movement make a
stop (RECPLAY=0x0).
TCLKEN
Explanation
0x0
Sound Stop STATE
Stop recording and playback.
Rec STATE
0x1
Recording start. Microphone input is converted from analog to digital, and transferred
through SAI.
Play STATE
0x2
Playback start. SAI received data is converted from digital to analog and output from
playback path.
Rec and Play STATE.
0x3
Simultaneously Recording and Playback start. Microphone input is converted from
analog to digital, and transferred through SAI and SAI received data is converted from
digital to analog and output from playback path.
Monitor STATE.
0x7
Monitoring the recording sound start. Microphone input is converted from analog to
digital, and transferred through SAI and this data is converted from digital to analog and
output from playback path.
MIC Input Charging Time Register
MAPCON
INDEX
b07
b06
b05
b04
b03
b02
b01
b00
R
W
(Initial)
0x0
0x14 0x15
-
-
MCTIME
-
-
0
0
0
0
0
0
This register is to select the wait time for microphone input load charge. The LSI work recording signal or playback signal
are mute when from RECPLAY is changed from 0x0 until MCTIME. This time contains required time of initializing DSP that
is 40/fs. It must be waited the setting time to start recording or playback.
MCTIME is valid at playback. If it is necessary to start up earlier on playback, please set MCTIME to 0x00. It is minimum
time.
.
MCTIME [5:0]
Setting
fs conversion
Time (fs=48kHz)
0x00
40/fs
0.8ms
0x01
128/fs
2.7ms
0x02
256/fs
5.3ms
0x03
384/fs
8.0ms
0x04 - 0x3D
(128/fs / step)
:
0x3E
7936/fs
165.3ms
0x3F
8064/fs
168.0ms
Note) the waiting time for microphone input load charge
It is a recommended value of MIN1 coupling capacitor at the charge time.
Charge waiting time
Capacitor
capacity
Charge waiting time (6 τ)
0.1µF
16ms
0.22µF
36ms
* Charge time is proportional to capacity of capacitor.
Register MAP Control Register
MAPCON
INDEX
b07
b06
b05
b04
b03
b02
b01
b00
R
W
(Initial)
ALL
0x1c 0x1d
-
-
-
-
-
-
MAPCON
-
-
-
-
-
-
0
0
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TSZ02201-0V2V0E500110-1-2
26.Oct.2015 Rev.002