BU7831KN_06 Datasheet, PDF (6/17 Pages) Rohm – Voice/Audio Mixer & Selector

●Input terminal equivalent circuit diagram
PAD
PAD
100kΩ(TYP)
PAD
A SCLK, SDATA, NCS, NRST
B CSTEP
C ST2R, ST2L, ST3R, ST3L
PAD
D ST1R, ST1L
PAD
E VSS, VDD
PAD
F CVCOM, CSTART
PAD
G HPR, HPL, EXTO, SPR,
SPL
About Digital input (Type A): When you will have possibility to give Hi-z for input pin,
You must select from the under heads for protect the pin floated.
a) Pull down with less than 10kohm b) Pull up c) Give “L” signal just before Hi-Z.
Fig.21 Equivalent circuit diagram
No.
Name
Function
1
SCLK Serial clock input of CPU I/F
2
SDATA Serial data input of CPU I/F
3
NCS Chip select input of CPU I/F
4
NRST Reset input L=Reset
5
ST1R Stereo 1 input for R channel
6
ST1L Stereo 1 input for L channel
7
ST2R Stereo 2 input for R channel
8
ST2L Stereo 2 input for L channel
9
ST3R Stereo 3 input for R channel
10
ST3L Stereo 3 input for L channel
No.
Name
Function
11
CVCOM Reference voltage
12
CSTEP Connect capacitor for blocking pop-noise
13
HPR Headphone R channel output
14
VSS Ground
15
VDD Power supply
16
HPL
Headphone L channel output
17 CSTART Connect capacitor for blocking start up
pop-noise
18
EXTO 600Ω driver output
19
SPR Speaker R channel output
20
SPL
Speaker L channel output
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