盛群半導體股份有限公司 ● 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 -3- -4-