BU21050FS Datasheet, PDF (4/8 Pages) Rohm – Capacitive Sensor Switch Control IC

BU21050FS
Technical Note
●Pin Description
Pin
No.
Name
1
SDN
2 DVDD
3
GND
4 SREF
5
SIN1
6
SIN2
7
SIN3
8
SIN4
9
SIN5
10 SIN6
11 SIN7
12 SIN8
13 THON
14 THOFF
15 AVDD
16 FILTER
17 IFSEL
18 INSEL
I/O
Function
Note
In Shutdown input
Power Digital part Power supply
“H” : state of operation
“L” halt condition
Digital part Power supply
Ground Ground
-
AIn Standard capacitor input
-
AIn Sensor input1
-
AIn Sensor input 2
-
AIn Sensor input 3
-
AIn Sensor input 4
-
AIn Sensor input 5
-
Ain Sensor input 6
-
AIn Sensor input 7
-
AIn Sensor input 8
-
AIn
Sensor ON threshold voltage
input
-
AIn
Sensor OFF threshold voltage
input
Power Analog part Power supply
-
In Filter selection
“H”: Filter effect: strong
“L”: Filter effect: Weak
“H” :ON : L-Active,
In Sensor output selection
OFF : Nch Open Drain
“L”: 4bit Binary Mode
H-Active, L
“H” : simultaneous push
In
simultaneous push selection
banned
“L” : 8 outputs setting
19 GAIN[0]
20 GAIN[1]
21 PO8
In
Gain level selection
In
Out sensor output8
GAIN[1:0] = 00 : Strong
GAIN[1:0] = 01 :
GAIN[1:0] = 10 :
Gain
GAIN[1:0] = 11 : Week
-
22 PO7
Out sensor output7
-
23 PO6
Out sensor output6
-
24 PO5
Out sensor output5
-
25 PO4
26 PO3
27 PO2
28 PO1
Out sensor output4/BIN[3]
Out sensor output3/BIN[2]
Out sensor output2/BIN[1]
Out sensor output1/BIN[0]
INSEL=“L”: Binary Mode
0000 = Button OFF
0001 = SIN1 ON
1000 = SIN8 ON
29 TST0
In digital part test input0
Usually tide to “L”
30 TST1
In digital part test input1
Usually tide to “L”
31 TST2
In digital part test input2
Usually tide to “L”
32 TST3
In digital part test input3
Usually tide to “L”
※*1 Initial State ①When internal organs power-on reset is effective
②When SDN=”L”
※2 “Hi-Z” when PIO Mode
※3 “L” when Binary Mode
Supply Reset Level I/O Pad
DVDD
①
-
-
AVDD
“Hi-Z”
③
AVDD
“Hi-Z”
③
AVDD
“Hi-Z”
③
AVDD
“Hi-Z”
③
AVDD
“Hi-Z”
③
AVDD
“Hi-Z”
③
AVDD
“Hi-Z”
③
AVDD
“Hi-Z”
③
AVDD
“Hi-Z”
③
AVDD
“Hi-Z”
③
AVDD
“Hi-Z”
③
-
DVDD
①
DVDD
①
DVDD
①
DVDD
①
DVDD
①
DVDD “Hi-Z”^*2 “L”^*3 ②
DVDD “Hi-Z” “L” ②
DVDD “Hi-Z” “L” ②
DVDD “Hi-Z” “L” ②
DVDD “Hi-Z” “L” ②
DVDD “Hi-Z” “L” ②
DVDD “Hi-Z” “L” ②
DVDD “Hi-Z” “L” ②
DVDD
①
DVDD
①
DVDD
①
DVDD
①
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4/7
2009.04 - Rev.B