Using AT89C2051-24PC in 20-pins SOIC-20 SMT Package , we deleveloped a very verstyle matrix keypad with a power ON/OFF dedicated key with 3 sec hold to ON/OFF the P1.7 and scanning all the keys and send the appropriate byte to the serial port of the MCU. this code could b used in many applications with other embedded controllers.

KEYPAD_FIRMWARE.C
KEYPAD_FIRMWARE.LST
KEYPAD_FIRMWARE.OBJ
KEYPAD_PROJECT
KEYPAD_PROJECT.hex
KEYPAD_PROJECT.lnp
KEYPAD_PROJECT.M51
KEYPAD_PROJECT.Opt
KEYPAD_PROJECT.plg
KEYPAD_PROJECT.Uv2
KEYPAD_PROJECT_Opt.Bak
KEYPAD_PROJECT_Uv2.Bak
KEYPAD_SCANNER.H

• We are an exchange download platform that only provides communication channels. The downloaded content comes from the internet. Except for download issues, please Google on your own.
• The downloaded content is provided for members to upload. If it unintentionally infringes on your copyright, please contact us.
• Please use Winrar for decompression tools
• If download fail, Try it againg or Feedback to us.
• If downloaded content did not match the introduction, Feedback to us，Confirm and will be refund.
• Before downloading, you can inquire through the uploaded person information

Nothing．