(Original) high-precision timer circuit schematic. Using AT89S52 plus DP8573, realize two functions: to maintain power-down function with calendar clock, by an external switch to trigger the high-precision timing signal.

Packet : 49636948mstimer.rar filelist
mstimer.hex
mstimer.lnp
msTimer.LST
mstimer.M51
msTimer.OBJ
mstimer.Opt
mstimer.plg
mstimer_Opt.Bak
mstimer
msTimer.C
msTimer.pdf

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