function:     2**24 Learning Decoder
package:      DIP/16
manufacturer: Holtek

          +--()--+
   M1(D1) | 1  16| M0(DO)
       D3 | 2  15| LEARNB(LED)
       D2 | 3  14| DIN
       D1 | 4  13| OSC2
       D0 | 5  12| OSC1
       VT | 6  11| VDD
      VSS | 7  10| RESB
CLEAR(CS) | 8   9| LHB/MM(SK)
          +------+

• Operating voltage: 2.4V~5.2V
• Low power and high noise immunity CMOS technology
• Capable of decoding 24-bit information
• Pair with HOLTEK’s 224  programmable encoders (HT6P20)
• 0/2/4 bit data selectable by M0 and M1 pins
• Binary address setting
• Anti-scan pause
• 100ms break time for successive learning
• Three times of check for remote control
• Five times of check for Learning State
• Built-in oscillator needs only 5% resistor
• VT goes high during a valid transmission
• Easy interface with RF or infrared receiver
• Minimal external components

 

The HT6P11 224 decoder is a CMOS LSI for remote control system applications. It pairs with HOLTEK’s 224 series of programmable encoders.

The combination of HT6P11 & EEPROM (HT93LC46) offers the learning function. The EEPROM is capable of storing a maximum of 8 sets of local address. When in learning state, the chip decode & undone the serial addresses received from a 224 encoder as its own local customer code (address) and store them in the EEPROM after completing 5 times of verification.

On the other hand, it compares the local addresses twice with the received codes when in the remote control state, if all matched, the received data codes are decoded to output pins and the VT goes high to indicate a valid transmission.

The HT6P11 is capable of decoding 24 bits of information which consists of address of N bits and data of (24–N) bits. It is arranged to provide a number of data bits ranging from 0 to 4 and an address bit ranging from 20 to 24 to meet various applications, with the selection made by controlling the status of M0 & M1 pins (refer to the data selection table).