BS808B DemoBoard Manual_ENv100.pdf

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● Demo Board–Bottom Side
HOLTEK SEMICONDUCTOR INC.
HOLTEK Touch Key IC Demo Board
BS808B
User Manual
● Demo Board–Top Side
IC1
Key0
1
.
Key1
Key2
3
.
Key3
Key4
.
4
5
.
Key5
Key6
.
2
.
6
7
.
Key7
.
8
9
R9
N.C.
CS
4pF
.
Cref
10
Key 0
Key 1
Key 2
Key 3
Key 4
Key 5
Key 6
Key 7
Cref
VSS
KOUT0
KOUT1
KOUT2
KOUT3
KOUT4
KOUT5
KOUT6
KOUT7
VDD
OKW
CON5
-1-
19
KOUT1
18
17
KOUT2
KOUT3
16
KOUT4
15
KOUT5
14
KOUT6
13
KOUT7
12
VDD
11
OKW
R1 2.7K
LED1
R2 2.7K
LED2
R3 2.7K
LED3
R4 2.7K
LED4
R5 2.7K
LED5
R6 2.7K
LED6
R7 2.7K
LED7
R8 2.7K
LED8
VDD
+
OKW
JP2
KOUT6
KOUT7
VDD
OKW
GND
KOUT0
BS808B_20SSOP
JP1
1
2
3
4
5
20
1
2
3
4
5
6
KOUT0
KOUT1
KOUT2
KOUT3
KOUT4
KOUT5
C1
0.1uF
BAT1
CR2032
-
VSS
<OKW Option>
Short: Any Key Wake up.
Open: One Key Wake up.
CON6
-2-
● Pull out the insulator between battery and battery holder to power up
the Demo Board. (Ensure that not touching any component when
doing this.)
● Touch Key0 to wake up the Touch IC. (Default is in One-Key
wakeup mode after power on.).
● After a key touch action has been verified then the output indicator
LED1~8 and the KOUT0~7 pins will be activated with a LEVEL
HOLD output.
Touch Key Condition
LED n
KOUT x pin status when
connected to pull-high
Key x is touched
On
0V
When in use the following problems may be encountered:
Problem
Potential Solution
No actions after
battery is installed
Abnormal LED
action
LED uneven
Check that whether the battery is not inserted correctly
or with the wrong polarity, has poor contacts or has no
power.
When a touch action results in abnormal LED
illumination, re-install the battery to re-activate or wait
for about 40 seconds after which the LED will
automatically extinguish.
The CR2032 is low on power and should be replaced.
Key x is not touched
Off
3.0V
Note: “x” means 0, 1, 2, 3, 4, 5, 6 or 7; “n” means 1, 2, 3, 4, 5, 6, 7 or 8
● The OKW pin wake up control is described as following table:
OKW pin condition
Ground
Floating
One Key wake up
----ˇ
BS808B Touch Key IC Demo Board (includes a BS808B 20SSOP IC) x 1
CR2032 Battery x 1
User Manual x 1
Any Key wake up
ˇ
-----
● Specifications
● Using "Touch PAD sensitivity adjust connections" to modify the
sensitivity of each key.
●
●
●
●
● Accessories
Verify the Touch Key sensitivity and response time.
Determine the Sense PAD external casing material thickness.
Determine the sense PAD area.
Test the Touch Key IC Specification Characteristics.
● Provide the customer with a Touch Key related PCB Layout for consultation.
● Provide the customer with a demonstration and evaluation.
Model : BS808B_DemoV100
Keys : 8 KEY
Battery : CR2032 Lithium Battery
Power Consumption : 1.5μA ( One Key wakeup standby )
5.0μA ( Any Key wakeup standby )
18μA ( Normal Mode )
Size : 64mm (H) x 64mm (W) x 11mm (D)
For more information about the touch Key IC, please visit our web site at
http://www.holtek.com.tw/touchkey
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