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AT89C51ED2-RDTUM Scheda tecnica(PDF) 83 Page - ATMEL Corporation |
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AT89C51ED2-RDTUM Scheda tecnica(HTML) 83 Page - ATMEL Corporation |
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83 / 137 page  83 4235K–8051–05/08 AT89C51RD2/ED2 18.4 Registers Table 18-2. PCON Register PCON (S87:h) Power configuration Register Reset Value= XXXX 0000b 7 6 5 4 3 2 1 0 - - - - GF1 GF0 PD IDL Bit Number Bit Mnemonic Description 7-4 - Reserved The value read from these bits is indeterminate. Do not set these bits. 3 GF1 General Purpose flag 1 One use is to indicate whether an interrupt occurred during normal operation or during Idle mode. 2 GF0 General Purpose flag 0 One use is to indicate whether an interrupt occurred during normal operation or during Idle mode. 1 PD Power-Down Mode bit Cleared by hardware when an interrupt or reset occurs. Set to activate the Power-Down mode. If IDL and PD are both set, PD takes precedence. 0 IDL Idle Mode bit Cleared by hardware when an interrupt or reset occurs. Set to activate the Idle mode. If IDL and PD are both set, PD takes precedence. |
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