Low voltage detection. A mouth low 8 to connect keyboard line, keyboard line connect VDDIO; B high 8 LED // press K1 with a low voltage of 2.4v // the low voltage is 2.8v by K2 // press K3 key low voltage 3.2v // the low voltage of K4 is 3.6v

lvr18
.....\Debug
.....\Device.env
.....\ex2_S480.env
.....\ex2_S480.h
.....\ex2_S480.lik
.....\ex2_S480.opt
.....\ex2_S480.rc
.....\ex2_S480.set
.....\ex2_S480.spj
.....\hardware.asm
.....\hardware.h
.....\hardware.inc
.....\ISR.asm
.....\main.c
.....\Makefile
.....\Resource.asm
.....\Resource.inc
.....\s480.h
.....\s480.inc
.....\sacmv25.lib
.....\voice
.....\.....\48.48K
.....\.....\72.72K
.....\.....\K72.72K

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