ADP315PC87570 National Semiconductor, ADP315PC87570 Datasheet - Page 7

• Manufacturer Part Number: ADP315PC87570
• Description: Keyboard and Power Management Controller
• Manufacturer: National Semiconductor

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