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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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GMS81C2012 데이터시트(PDF) 89 Page - Hynix Semiconductor |
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GMS81C2012 데이터시트(HTML) 89 Page - Hynix Semiconductor |
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89 / 107 page  HYUNDAI MicroElectronics GMS81C2012/GMS81C2020 MAR. 2000 Ver 1.00 89 21. OTP PROGRAMMING 21.1 DEVICE CONFIGURATION AREA The Device Configuration Area can be programmed or left unprogrammed to select device configuration such as secu- rity bit. Sixteen memory locations (7030H ~ 703FH) are designated as Customer ID recording locations where the user can store check-sum or other customer identification numbers. This area is not accessible during normal execution but is readable and writable during program / verify. Figure 21-1 Device Configuration Area DEVICE 7030H 7030H 703FH 703FH ID CONFIG CONFIGURATION AREA 7031H ID 7032H ID 7033H ID 7034H ID 7035H ID 7036H ID 7037H ID 7038H ID 7039H ID 703AH ID 703BH ID 703CH ID 703DH ID 703EH ID 7 6543210 RCO INITIAL VALUE: -000 -0-0B ADDRESS: 703FH CONFIG LOCK Code Protect 0 : Allow Code Read Out 1 : Lock Code Read Out PFD Level Selection 00: PFD = 2.7V 01: PFD = 2.7V External RC OSC Selection 0: Crystal or Resonator Oscillator 1: External RC Oscillator PFS0 PFS1 R7X 10: PFD = 3.0V 11: PFD = 2.4V R74, R75 Port Selection 0 : Sub Clock 1 : R74, R75 |
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