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Touch Switch Detection Tool Demo
Board Introduction
D/N: HA0145E
Introduction
When using Holtek touch switch series devices, such as the HT45R34, HT45R36,
HT45R38 etc, it is normally necessary to know the touch switch sense value changes in
order to adjust the switch sensitivity. In order to allow users, after programming their
devices, to conveniently monitor the touch switch value changes, Holtek has designed
this demoboard.
The main function of this demoboard is to display user transmitted data. To allow for easy
communication, a communication program is also provided with the demoboard.
The demoboard uses the HT48R10A-1 device. The HT48R10A-1 is a Holtek 8-bit MCU
with 1K Program Memory capacity, 64 byte Data Memory capacity and 21 I/O lines.
Touch Switch Detection Tool Demo Board Introduction
1
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Related Manuals for Holtek HT45R36
Summary of Contents for Holtek HT45R36
- Page 1 D/N: HA0145E Introduction When using Holtek touch switch series devices, such as the HT45R34, HT45R36, HT45R38 etc, it is normally necessary to know the touch switch sense value changes in order to adjust the switch sensitivity. In order to allow users, after programming their devices, to conveniently monitor the touch switch value changes, Holtek has designed this demoboard.
- Page 2 Touch Switch Detection Tool Demo Board Introduction Demo Board Hardware Block Diagram Block Diagram Hardware Functional Description • Main Controller HT48R10A-1 • Main controller is a SLAVE terminal which receives serial data to display from a MASTER terminal • Three switches are used to setup the working mode and to switch the display information •...
- Page 3 Touch Switch Detection Tool Demo Board Introduction Circuit Description Circuit Diagram...
- Page 4 Touch Switch Detection Tool Demo Board Introduction Circuit Description • P1 is the input 9V DC power source and which after filtering by C6 and C2 is provided to the 7805 regulator pin 1. The pin 3 output of the regulator provides the 5V supply for the MCU.
- Page 5 Touch Switch Detection Tool Demo Board Introduction Communication Timing Diagram In the above diagram the time between A and B must not be less than 25us and the communication speed must be less than 100kHz. Using the Master Transmission Program The main function of the Demo Board is to display the data transmitted by the user.
- Page 6 Touch Switch Detection Tool Demo Board Introduction For example, to transmit channel 1 data, then a value of 11H should be placed in M_DEBUG_ADDR. To transmit channel 5 data, then 55H should be placed in M_DEBUG_ADDR. Call Method When using it is only necessary to place the SBR_DEBUG subroutine into the main program.
- Page 7 Touch Switch Detection Tool Demo Board Introduction L_DEBUG_LP1 L_DEBUG_LP2: M_DEBUG_DATAH ;;Send M_DEBUG_DATAH P_DATA P_DATA P_CLK ;;CLK = 0,Slave will read data P_CLK L_DEBUG_LP2 L_DEBUG_LP3: M_DEBUG_ADDR ;;Send ASCR P_DATA P_DATA P_CLK ;;CLK = 0,Slave will read data P_CLK L_DEBUG_LP3 P_CS...
- Page 8 Touch Switch Detection Tool Demo Board Introduction Demo Board Operating Description Data Display DC 9V Power Input Display Channel Series communication DC 5V Power Interface VCC and GND Power Connection Method There are two methods of supplying power to the Demo Board. One way is to use a 9V DC adapter which will be regulated down to 5V via the onboard 7805 regulator IC.
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