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AT87C51RB2 Datasheet(PDF) 39 Page - ATMEL Corporation |
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AT87C51RB2 Datasheet(HTML) 39 Page - ATMEL Corporation |
39 / 86 page 39 4188F–8051–01/08 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 7 SMOD1 Serial port Mode bit 1 Set to select double baud rate in mode 1, 2 or 3. 6 SMOD0 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. 4 POF 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. 3 GF1 General purpose Flag Cleared by user for general purpose usage. Set by user for general purpose usage. 2 GF0 General purpose Flag Cleared by user for general purpose usage. Set by user for general purpose usage. 1 PD Power-Down mode bit Cleared by hardware when reset occurs. Set to enter power-down mode. 0 IDL Idle mode bit Clear by hardware when interrupt or reset occurs. Set to enter idle mode. |
Similar Part No. - AT87C51RB2_14 |
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Similar Description - AT87C51RB2_14 |
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