HT82K28A_02 HOLTEK [Holtek Semiconductor Inc], HT82K28A_02 Datasheet
HT82K28A_02
Related parts for HT82K28A_02
HT82K28A_02 Summary of contents
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Features Designed for Windows 95/98/NT Supports 3 Windows 95 Keys Supports Power, Sleep and Wake-up Windows 98 ACPI functions Supports Japanese, Korean and Portuguese Supports Japanese DOS/V 106-key keyboard Supports code set 1, for PS/2 model 30 keyboard General Description ...
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Pin Description Pin No. Pin Name I/O 1 OSC1 I System clock input 2, 4 VSS Negative power supply, ground 3 VDD Positive power supply 5, 6 IO0~IO1 O Customer defined optional output lines 39, 40, 7~12 C0~C7 I Keyboard ...
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Functional Description The HT82K28A basic function is to detect key press and release activity and to transmit the corresponding scan code, as well as make and break codes to the system. The device also accepts commands from the system and ...
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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 ...
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Command description Default disable F5 Send an acknowledge FA to the system Clear its output buffer, FIFO Set the default key types Set typematic rate/delay as default value Clear the last typematic key Stop scanning and wait for further instruction ...
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Bit 7=0 (always) Delay= (1+bit6,bit5) 250ms Typematic rate= 1/period ...where period= (8+A) (2^B) 0.00417 ...where A= binary value of bit 2, 1 and 0 ...where B= binary value of bit 4 and 3 Typematic Typematic b4~b0 b4~b0 rate 00000 30.0 ...
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Key code set 1 Key Number Make/Break Code ...
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Key code set 1 Base Case Key Number Shift+Num / / / / / / ...
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Key code set 2 Key Number Make/Break Code ...
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Key code set 2 Base Case Key Number Shift+Num / / / / ...
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Key code set 3 Key # Make/Break Code Note Default Key State Typematic Typematic Typematic Typematic ...
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Timing Diagrams Data output Keyboard data input Rev. 1.30 HT82K28A 12 June 27, 2002 ...
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Application Circuits Rev. 1.30 HT82K28A 13 June 27, 2002 ...
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Standard Holtek Win98 keyboard L-CTRL WAKE- K131 K132 K133 & ...
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Package Information 40-pin DIP (600mil) outline dimensions Symbol Min. A 2045 B 535 C 145 D 125 595 I 635 0 Rev. 1.30 HT82K28A Dimensions in mil Nom. Max. 2065 555 155 145 20 ...
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Holtek Semiconductor Inc. (Headquarters) No.3, Creation Rd. II, Science Park, Hsinchu, Taiwan Tel: 886-3-563-1999 Fax: 886-3-563-1189 http://www.holtek.com.tw Holtek Semiconductor Inc. (Taipei Sales Office) 4F-2, No. 3-2, YuanQu St., Nankang Software Park, Taipei 115, Taiwan Tel: 886-2-2655-7070 Fax: 886-2-2655-7373 Fax: 886-2-2655-7383 ...