SK8811 final specWord文件下载.docx

1、May 28, 2001Initial DraftJane Cao0.2Jun 8, 2001Verify 2.1.2& 2.4AJul 7,2001Add 5.15Table of Contents1 General 52 Mechanical Specifications 52.1 Dimensions and Weight 52.2 Material and Texture 52.3 Color 62.4 Detachability and cable exit 62.5 Services and Ergonomics 62.6 Characteristics of rubber swi

2、tches 72.7 key Cap Specification 83 Electrical Specification 93.1 Operating voltage 93.2 Current Consumption 93.3 Power Consumption 93.4 Signal Timing and Level 93.5 Pin out of 6 pin min-DIN connector 93.6 Circuitry 94 Functions and Features 104.1 Operation Modes and Indicators 104.2 Keyboard Buffer

3、 104.3 Typematic delay and repeat rate 104.4 Pseudo N-Key rollover capability 114.5 Free from illegal ghost keys 114.6 Self Test 124.7 Interface specification with host PC 124.8 Logic Signals 124.9 AT & PS/2 Mode Protocol 134.10 Commands from the host （AT/PS2 Mode） 144.11 Command to the host （AT/PS2

4、 Mode） 175. Environmental and Reliability Specifications 195.1 Temperature & Humidity Test 195.2 Elevated Temperature 195.3 Thermal Cycle 195.4 Temperature Shock 205.5 Drop Test 205.6 Vibration Test 215.7 Rigidity 215.8 Stain Resistance 215.9 Chemical Resistance 225.10 Crush Resistance 225.11 Wear r

5、esistance 235.12 Ultra Violet Light 235.13 Metal Migration 235.14 Corrosive Environment 235.15 Spill Resistance 246 Regulatory Certification 256.1 Safety 256.2 EMS 256.3 EMI 257 Keyboard Scan Code 267.1 Typematic characteristics 267.2 Scan Code Table （Showed as below） 261 GeneralSK-8811（A） is design

6、ed for IBM. It is designed specifically to meet the requirements of the PC compatible computer manufacturer. This specification defines mechanical, reliability, dynamic, electrical requirements.The keyboard is the detachable space saver rubber switch keyboard. It is configurable for 106/107/108/109/

7、111 key layout with languages according to customer requested. Three special function keys, L-win, R-win and application allow this keyboard to be used win95, win98,win2000 and NT.ComparisonDescriptionSK-8811（A）SK-8811Enclosure Top in sk-8806 and Button in sk-8809New tool without modularEMC/SafetyNo

8、 MICShowed as 6.1,6.2 & 6.3PCBUse connector, double sideUse rubber press, single sideCable2 meters, 4.52 meters, 3.8Spill resistanceNo Yes, showed as 5.152 Mechanical Specifications2.1 Dimensions and Weight2.1.1 Unpacked（1） Dimensions （Tolerance : +/- 3mm）Length Depth Height415mm 180mm 39mm（2） Weigh

9、t （Tolerance : +/- 0.1 kg）Measured bare keyboard : 0.68 kg2.1.2 Packed - Including packing / buffering material +/- 3 mm）445mm 221mm （3458）mm The Gift Box is sloped design.Measured with gift box and buffering: 1.0kg 2.2 Material and TextureUpper casework HI-PS 94 HB Lower casework HI-PS 94 HB Bracke

10、t HI-PS 94 HB Key caps ABS 94HB （TECHNO K4 for black ccolor）Rubber sheet switch LIMS RubberLED Lens PMMA2.3 ColorUpper casework : IBM stealth black or Pearl white Lower casework : IBM stealth black or pearl whiteKey Cap : Stealth black, Raven black and blue or sage gray, pearl white and steel blue.

11、Plastic flip foot : IBM stealth black or Pearl whiteRubber foot : Black or sage gray Cable connector : Panton 2715CCable :IBM logo : IBM blue for Pearl white & PMS 877C for stealth black2.4 Detachability and cable exitThere are 4 exits on lower casework for cable routing purpose. Cable outsides is 2

12、 meters in length and a 6 pin mini-DIN connector.2.5 Services and Ergonomics2.5.1 Key caps height profile meet DIN standard with height of C row under 30mm. 2.5.2 Legend printing on key caps meets ANSI standard, which applies to all keys, the printed characters are visible within 30 cm distance from

13、 any viewing angle and printing contrast exceeds 3:1 （4:1 for black keyboard） under 500 Lux illuminated background.2.5.3 Adjustable tilt legs located in lower casework allow unit to be adjusted to the most comfortable angle for user to operate.2.5.4 Tactile feeling feedback for users ensures proper

14、make and break for each key press. 2.5.5 Suitable anti-slip forces given by rubber feet prevent unit from moving under normal operation.2.5.6 Acoustic noise generated by key press less than 65dBA for space bar and 60 dBA for all other keys.2.5.7 A warning label can be laser printed on the keyboard b

15、etween the QWERTY section and the numeric keypad section.2.6 Characteristics of rubber switches2.6.1 Standard keys life cycle 10 millions cycles under normal operation.（6 cycle/second, 15-20 lbs.） after 10 million life cycles return force no less than 10 grams. Force （gram） P1 57g P2 25g 0.8 2.0 3.7

16、mm Travel （mm） Fig 2-1 Typical curve of force response:2.6.2 Major specification of rubber switch Preload Force : 25.0 + - 10 gram （ISO 25-75 % of Peak） P1 Peak force : 57.0 +/-10 grams Travel :0.8 +/-0.25 mm P2 Force : 28 +/- 10 grams 2.0 +/-0.3 mmBounce : 5 ms max. Return force : 20 +/- 10 grams T

17、ravel to make : Make Force : 37.0 + - 10 grams Total travel : 3.7 +/-0.4 mm 2.7 key Cap Specification2.7.1 Retention Force 1.3 kg minimum to pull up the keys from frame 2.7.2 Gaps Gaps between adjacent row or column of keys: 1.05+/-0.3 mm2.7.3 Static WobbleWobble of keys is defined here as movement

18、of points from its original position when force is applied.Wobble under normal typing force:For standard keys: 0.50mmFor space bar: 1.65mmFor other special keys:3 Electrical Specification3.1 Operating voltageVoltage supplied to keyboard:5+/-0.25 VDC3.2 Current ConsumptionUnder nominal 5 VDC power su

19、pplied, typical current consumption is 75 mA +/- 10% for EMC IC.3.3 Power ConsumptionUnder normal operation, the maximum power consumption will be less than 0.375 Watt.3.4 Signal Timing and LevelLevel and timing of signals presented on data and clock pins are compatible with both TTL or MOS terminat

20、ion on the host PC motherboard.3.5 Pin out of 6 pin min-DIN connectorCompatible with IBM PS/2 6 pin DIN connection.3.6 Circuitry3.6.1 PCBAMicroprocessor EMC CMOS technology performs most functions internally. Components and circuitry are laid out and routed on single side PCB.3.6.2 MembraneKey matri

21、x traces with switch contact fingers are laid out and routed on a 3 layers membrane sheet. The contact resistance is less than 400 ohm.3.6.3 Connecting PCBA and MembraneMechanical clamping mechanism provides contact between membrane and PCBA for connection scan lines and return lines on membrane key

22、 matrix to PCBA circuit via contact fingers.4 Functions and Features4.1 Operation Modes and IndicatorsThree operation mode LEDs located on right upper corner of upper casework will activate individually or in combination according to definition compatible with IBM AT and PS/2. The three indicators h

23、ave the nomenclature Num Lock, Caps Lock and Scroll Lock. They are activated and de-activated by receiving a two byte system command code Hex ED XX from host PC.4.2 Keyboard BufferA 16 key FIFO buffer stores the scan codes until the host is ready to receive them. Buffer overrun occurs when more than

24、 16 keys are stored without being sent. An overrun code replaces the 17th key to be stored in the buffer. Additional keys pressed will cause loss of data if the host is kept busy and the keyboard is unable to send out the contents in the buffer.4.3 Typematic delay and repeat rateAll keys are typemat

25、ic, except for the PAUSE key. When a key is pressed and held down, the keyboard will delay 500 msec, then send the make code. Make code of the key being held down will be sent repeatedly at the rate of 10.9 characters per second. If two or more keys are pressed and held down, only the last key press

26、ed will be repeated at the repeat rate. When the last key is released, typematic operation stops, even if other keys are still held down. If a key is pressed and held down while keyboard transmission is disabled, only the first keys make code is stored in the type ahead buffer. This prevents a type

27、ahead buffer overflow when the typematic operation acts. In the AT mode, the typematic delay and repeat rate can be programmable. This is done by command from host.Default Repeat Rate and Typematic Delay are :Repeat rate : 10.9 characters per secondTypematic delay :500 msec4.4 Pseudo N-Key rollover

28、capability N key roll is the number of keys that may be held depressed simultaneously and have the keyboard generate the appropriate code for each pressed and released key without keyboard interruption. All combinations of Ctrl, Alt and Shift keys are not ghost keys.4.5 Free from illegal ghost keys

29、Key matrix layout has been properly managed such that no ghost key occurs for any three key combination. The ghost key is defined as three key combination where a valid third key falls in the # pattern in the key matrix formed by the proceeding valid two key combination. Normally in this case, the t

30、hird key will be masked without sending any code because the third key and fourth key in this # pattern are confusing the microprocessor of the keyboard. If the third key was not masked properly, the ghost keydifferent key presses having the same electrical connection in scan lines and return lines matrix will occur.Some exceptions are