To do a 4X4 with ch452 keyboard, only four data lines are used to reduce the I/O port.

ch452\C8051F020Init.c
.....\C8051F020Init.h
.....\C8051F020Init.LST
.....\C8051F020Init.OBJ
.....\ch452L.c
.....\ch452L.h
.....\ch452L.LST
.....\ch452L.OBJ
.....\lcd12864.c
.....\lcd12864.h
.....\lcd12864.LST
.....\lcd12864.OBJ
.....\lcd12864.__i
.....\maintext.c
.....\maintext.LST
.....\maintext.OBJ
.....\maintext.__i
.....\STARTUP.A51
.....\STARTUP.LST
.....\STARTUP.OBJ
.....\text
.....\text.lnp
.....\text.M51
.....\text.Opt
.....\text.plg
.....\text.Uv2
.....\text_Opt.Bak
.....\text_Uv2.Bak
ch452

• 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．