| 전자부품 데이터시트 검색엔진 |
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AT80C51RA2-RLSIV 데이터시트(PDF) 39 Page - International Rectifier |
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AT80C51RA2-RLSIV 데이터시트(HTML) 39 Page - International Rectifier |
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39 / 85 page ![]() 39 4188E–8051–08/06 AT/TS8xC51Rx2 Reset Value = 00X1 0000b Not bit addressable Power-off flag reset value will be 1 only after a power on (cold reset). A warm reset doesn’t affect the value of this bit. Bit Number Bit Mnemonic Description 7SMOD1 Serial port Mode bit 1 Set to select double baud rate in mode 1, 2 or 3. 6SMOD0 Serial port Mode bit 0 Clear to select SM0 bit in SCON register. Set to to select FE bit in SCON register. 5- Reserved The value read from this bit is indeterminate. Do not set this bit. 4POF Power-Off Flag Clear to recognize next reset type. Set by hardware when VCC rises from 0 to its nominal voltage. Can also be set by software. 3GF1 General purpose Flag Cleared by user for general purpose usage. Set by user for general purpose usage. 2GF0 General purpose Flag Cleared by user for general purpose usage. Set by user for general purpose usage. 1PD Power-Down mode bit Cleared by hardware when reset occurs. Set to enter power-down mode. 0IDL Idle mode bit Clear by hardware when interrupt or reset occurs. Set to enter idle mode. |
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