BU9253FS-E2 Rohm Semiconductor, BU9253FS-E2 Datasheet - Page 10

• Manufacturer Part Number: BU9253FS-E2
• Description: IC DGTL ECHO KARAOKE/SURR SSOP
• Manufacturer: Rohm Semiconductor
• Type: Karaoke, Surround Digital Echor

Specifications of BU9253FS-E2

• Applications: Karaoke
• Mounting Type: Surface Mount
• Package / Case: 16-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

・Delay time control circuit
・Delay signal volume circuit
・Feedback volume circuit
・Input mixer･selector circuit
This circuit controls delay time. -8 delay time can be selected by register.
This is the delay signal volume circuit. 8 volume setting can be selected by register.
This is the feedback volume circuit. 8 feedback volume setting can be selected by register.
This mixes MIC IN, LCIN, RCIN, VOIN signals, and selects the output path by selector.
D11
D0
D8
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
D12
D1
D9
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
LCIN
RCIN
MRCIN
VOIN
D10
D13
D2
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
＋
FBVOL
ISEL
Fig.31 Input mixer selector circuit
Delay time (Sampling frequency)
－
144.0msec (2MHz / 18)
192.0msec (2MHz / 24)
15.4msec (2MHz / 6)
21.1msec (2MHz / 6)
30.0msec (2MHz / 6)
48.0msec (2MHz / 6)
96.0msec (2MHz / 12)
9.2msec (2MHz / 6)
＋
＋
OSEL
DLYVOL
DLY
VOL
FBVOL
#1
-13dB
-15dB
-∞dB
-11dB
-∞dB
-12dB
-15dB
+3dB
-3dB
-6dB
-9dB
-3dB
-5dB
-7dB
-9dB
10/16
0dB
Delay
ディレイ
ADC
DAC
＋
＋
DOSW
－
＋
OSEL
OSEL
#2
#3
LPF cutoff frequency
RCOUT
LCOUT
DSIG
7kHz
3kHz