3X3 keyboard scanning with 8155 PB and PC ports (hardware circuit, see 3X3KEY_8155.DSN). When the 1~8 button is pressed in connection with the corresponding independent, PA port LEDx lights (i.e. the 1 key press button 2 pressed LDE1 lights, LDE2 light), when the 9 button is pressed, all LED light, when no key is pressed, all LED out.

3X3键盘扫描
3X3键盘扫描\8155
3X3键盘扫描\8155\3X3键盘扫描(8155).doc
3X3键盘扫描\8155\Proteus仿真
3X3键盘扫描\8155\Proteus仿真\3X3KEY_8155.DSN
3X3键盘扫描\8155\Proteus仿真\3X3KEY_8155.PWI
3X3键盘扫描\8155\Proteus仿真\Last Loaded 3X3KEY_8155.DBK
3X3键盘扫描\8155\汇编
3X3键盘扫描\8155\汇编\2
3X3键盘扫描\8155\汇编\2.LST
3X3键盘扫描\8155\汇编\2.M51
3X3键盘扫描\8155\汇编\2.OBJ
3X3键盘扫描\8155\汇编\2.Opt
3X3键盘扫描\8155\汇编\2.Uv2
3X3键盘扫描\8155\汇编\2.asm
3X3键盘扫描\8155\汇编\2.hex
3X3键盘扫描\8155\汇编\2.lnp
3X3键盘扫描\8155\汇编\2.plg
3X3键盘扫描\8155\汇编\2_Opt.Bak
3X3键盘扫描\8155\汇编\2_Uv2.Bak
3X3键盘扫描\8255
3X3键盘扫描\8255\3X3键盘扫描(8255).doc
3X3键盘扫描\8255\Proteus仿真
3X3键盘扫描\8255\Proteus仿真\3X3KEY_8255.DSN
3X3键盘扫描\8255\Proteus仿真\3X3KEY_8255.PWI
3X3键盘扫描\8255\Proteus仿真\Last Loaded 3X3KEY_8255.DBK
3X3键盘扫描\8255\汇编
3X3键盘扫描\8255\汇编\2
3X3键盘扫描\8255\汇编\2.LST
3X3键盘扫描\8255\汇编\2.M51
3X3键盘扫描\8255\汇编\2.OBJ
3X3键盘扫描\8255\汇编\2.Opt
3X3键盘扫描\8255\汇编\2.Uv2
3X3键盘扫描\8255\汇编\2.asm
3X3键盘扫描\8255\汇编\2.hex
3X3键盘扫描\8255\汇编\2.lnp
3X3键盘扫描\8255\汇编\2.plg
3X3键盘扫描\8255\汇编\2_Opt.Bak
3X3键盘扫描\8255\汇编\2_Uv2.Bak

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