BU21009MUV Datasheet, PDF (8/14 Pages) Rohm – Capacitive Sensor Switch Control IC

BU21009MUV
Technical Note
【1*h : Sensor Output Data】
Name:
SENS_DATA
Address:
1* h (one byte per sensor channel)
Description: The sensor output that converts to 10bit. Scaling, offsets and filtering (when enabled) are applied.
The most significant 8 bits are presented to the software with this register.
1*h
R/W
Initial val.
Bit7
SD_*[7]
R
1
Bit6
SD_*[6]
R
0
Bit5
SD_*[5]
R
0
Bit4
SD_*[4]
R
0
Bit3
SD_*[3]
R
0
Bit2
SD_*[2]
R
0
Bit1
SD_*[1]
R
0
Bit0
SD_*[0]
R
0
【30h : X positional value axially】
Name:
POSX
Address:
30h
Description: This represents the X-position of the press. The value is calculated differently depending on the matrix
arrangement. For example when:
・When POS_MODE[0]=0： Value interprets SIN[0:7]
・When POS_MODE[0]=1： Value interprets SIN[10:5]
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
30h
0
0
D5
D4
D3
D2
D1
D0
R/W
R
R
R
R
R
R
R
R
【31h : Y positional value axially】
Name:
POSY
Address:
31h
Description: This represents the Y-position of the press. The value is calculated differently depending on the matrix
arrangement. For example when:
・When POS_MODE[0]=0： Value interprets SIN[8:15]
・When POS_MODE[0]=1： Value interprets SIN[11:4:12:3:13:2:14:1:15:0]
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
31h
0
D6
D5
D4
D3
D2
D1
D0
R/W
R
R
R
R
R
R
R
R
【32h / 33h : Button ON/OFF】
Name:
BTN
Address:
32h, 33h
Description: This is the state of the sensor when considered as an ON/OFF button. Here 1 : On. 0 :Off.
32h
33h
R/W
Initial val.
Bit7
CH7
CH15
R
0
Bit6
CH6
CH14
R
0
Bit5
CH5
CH13
R
0
Bit4
CH4
CH12
R
0
Bit3
CH3
CH11
R
0
Bit2
CH2
CH10
R
0
Bit1
CH1
CH9
R
0
Bit0
CH0
CH8
R
0
【4* h : Offset Correction Data】
Name:
OFFSET
Address:
4* h (one byte per sensor channel)
Description: This is the offset required to correct the sense data to half scale during the calibration procedure.
4*h
R/W
Initial val.
Bit7
OFS_*[7]
R
1
Bit6
OFS_*[6]
R
0
Bit5
OFS_*[5]
R
0
Bit4
OFS_*[4]
R
0
Bit3
OFS_*[3]
R
0
Bit2
OFS_*[2]
R
0
Bit1
OFS_*[1]
R
0
Bit0
OFS_*[0]
R
0
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8/13
2009.04 - Rev.B