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PC87570 Datasheet(PDF) 7 Page - National Semiconductor (TI) |
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PC87570 Datasheet(HTML) 7 Page - National Semiconductor (TI) |
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7 / 168 page  7 Table of Contents www.national.com 5.14.14 IRQ Enable Register (IRQE) ....................................................................................... 63 6.0 Real-Time Clock (RTC) and Advanced Power Control (APC) 6.1 FEATURES ................................................................................................................................ 64 6.2 RTC FUNCTIONAL DESCRIPTION .......................................................................................... 64 6.2.1 Host Bus Interface ....................................................................................................... 64 6.2.2 Core Bus Interface ....................................................................................................... 64 6.2.3 Bank Description ......................................................................................................... 64 6.2.4 Bank Accessing ........................................................................................................... 64 6.2.5 RTC Clock Generation ................................................................................................ 64 6.2.6 Internal Oscillator ......................................................................................................... 65 6.2.7 External Oscillator ....................................................................................................... 65 6.2.8 Timing Generation ....................................................................................................... 65 6.2.9 Timekeeping ................................................................................................................66 6.2.10 Updating ...................................................................................................................... 66 6.2.11 Alarms ......................................................................................................................... 67 6.2.12 Power Supply ..............................................................................................................67 6.2.13 System Bus Lockout .................................................................................................... 68 6.2.14 Power-Up Detection .................................................................................................... 68 6.2.15 Oscillator Activity ......................................................................................................... 68 6.2.16 Interrupt Handling ........................................................................................................68 6.2.17 Battery-Backed Register Banks and RAM ................................................................... 68 6.3 RTC REGISTERS ...................................................................................................................... 69 6.3.1 RTC Control Register A (CRA) .................................................................................... 69 6.3.2 RTC Control Register B (CRB) .................................................................................... 70 6.3.3 RTC Control Register C (CRC) ................................................................................... 70 6.3.4 RTC Control Register D (CRD) ................................................................................... 71 6.4 USAGE HINTS .......................................................................................................................... 71 6.5 APC FUNCTIONAL DESCRIPTION .......................................................................................... 71 6.5.1 Operation ..................................................................................................................... 71 6.5.2 User Selectable Parameters ........................................................................................ 71 6.5.3 System Power States .................................................................................................. 71 6.5.4 System Power Switching Logic ................................................................................... 72 6.5.5 APC-ON/APC-OFF Interrupt Signals ........................................................................... 72 6.5.6 Entering Power States ................................................................................................. 72 6.5.7 Predetermined Wake-Up ............................................................................................. 72 6.5.8 Ring Signal Event ........................................................................................................ 72 6.6 APC REGISTERS ...................................................................................................................... 72 6.6.1 APC Control Register 1 (APCR1) ................................................................................ 73 6.6.2 APC Control Register 2 (APCR2) ................................................................................ 73 6.6.3 APC Status Register (APSR) ...................................................................................... 73 6.6.4 RAM Lock Register (RLR) ........................................................................................... 73 6.7 REGISTER BANKS ................................................................................................................... 74 7.0 High Frequency Clock Generator (HFCG) 7.1 FEATURES ................................................................................................................................ 76 |
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Similar Description - PC87570 |
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