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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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HT82K28A датащи(PDF) 4 Page - Holtek Semiconductor Inc |
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HT82K28A датащи(HTML) 4 Page - Holtek Semiconductor Inc |
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4 / 16 page  HT82K28A Rev. 1.30 4 June 27, 2002 Keys · For code set 1, 2 All keys except the PAUSE key have a make and break code. The PAUSE key has a make code only. The defaults except for PAUSE are make/break/ typematic. In mode 1, 2 and 3 the key type may be changed to be one of the following: ¨ Typematic ¨ Make/break ¨ Make ¨ Typematic/make/break All keys except PAUSE are typematic. Typematic means that the KB keeps sending make codes if the key is held down. The data report is according to the typematic rate/delay: Default values are: delay 500ms ± 20% 10.9 char/sec ± 20% The typematic rate and delay can be modified with the F3 command. ¨ If two or more keys are held down, only the last key pressed repeats at the typematic rate. Typematic operation stops when the last key pressed is released even if other keys are still held down. If a key is pressed and held down while keyboard transmission is inhibited, only the first make code is stored in the buffer overflow as a result of typematic action. Four key types are supported as shown: Key type press hold release Typematic Make/break Make Typematic/ make/break make1 make1 make1 make1 make2 X X make2 X break X break Note: ²make1² send out only one make code. ²Make2² continue sending out make codes until key is released. ²X² nothing sent out. · For code set 3 ¨ Typematic ¨ Make/break ¨ Make ¨ Typematic/make/break Can be configured by command Time interval between phantoms The time interval between two continuous error codes 00/FF sent while phantom detected= 1000ms ± 20% The keyboard should respond within 20ms, except when performing the BAT or executing a reset com- mand. m o d e 1 m o d e 2 m o d e 3 System command table Command mode 1 mode 2 mode 3 FF - reSset FE - resend FD - set key type make FC - set key type make/break FB - set key type typematic FA - set all keys typematic/make/break F9 - set all keys make F8 - set all keys make/break F7 - set all keys typematic F6 - set default F5 - default disabled F4 - enable F3 - set typematic rate/delay F2 - Read ID F1 - F0 - select alternate scan codes EF - EE - Echo ED - set/reset status indicators y y y y y y y y y y y y y y x y x y y y y y y y y y y y y y y y y x y x y y y y y y y y y y y y y y y y x y x y y |
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