This document is the keyboard test routine jumpers JP4, respectively, the < 1,2, " " 3,4 " ," 5,6 " ," 7,8> pin shorted, every press of a button, buzzer sound (buzzer to be shorted to JP7) sound, while digital tube will display the corresponding key.

KEY\c8051F320.h
...\KEY
...\key.c
...\key.h
...\KEY.hex
...\KEY.lnp
...\key.LST
...\KEY.M51
...\key.OBJ
...\KEY.Opt
...\KEY.plg
...\KEY.Uv2
...\KEY_Opt.Bak
...\KEY_Uv2.Bak
...\ML-320.c
...\ML-320.h
...\ML-320.LST
...\ML-320.OBJ
...\SPI.c
...\SPI.h
...\SPI.LST
...\SPI.OBJ
KEY

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