Maxim DS87C530 User Manuals

Table of Contents

• FEATURES

  1
• 14 Total Interrupt Sources with Six External

  1
• PIN CONFIGURATIONS

  1
• ORDERING INFORMATION

  2
  • 2
    • 2
      • 2
        • 2
          • 2
            • 2
              • TEMP RANGE

                2
• DETAILED DESCRIPTION

  3
• PIN DESCRIPTION

  4
  • 5
    • 5
      • 5
        • 5
          • 5
            • 5
              • NAME

                5
• COMPATIBILITY

  7
• PERFORMANCE OVERVIEW

  7
• INSTRUCTION SET SUMMARY

  7
• SPECIAL FUNCTION REGISTERS

  8
• NONVOLATILE FUNCTIONS

  10
• REAL-TIME CLOCK

  10
• NONVOLATILE RAM

  11
• CRYSTAL AND BACKUP SOURCES

  11
• To use the unique functions of the DS87C530/DS83C530, a 32.768kHz timekeeping crystal and a backup energy source are needed. The following describes guidelines for choosing these devices.

  11
  • Timekeeping Crystal

    11
  • Backup Energy Source

    12
  • IMPORTANT APPLICATION NOTE

    12
  • MEMORY RESOURCES

    12
  • OPERATIONAL CONSIDERATION

    13
  • PROGRAM MEMORY ACCESS

    13
  • DATA MEMORY ACCESS

    14
  • STRETCH MEMORY CYCLE

    15
  • DUAL DATA POINTER

    16
  • POWER MANAGEMENT

    17
  • POWER MANAGEMENT MODE (PMM)

    17
  • CRYSTAL-LESS PMM

    18
  • PMM OPERATION

    18
  • Clock Divider

    18
  • Switchback

    19
  • Status

    19
  • Crystal/Ring Operation

    20
  • IDLE MODE

    23
  • STOP MODE ENHANCEMENTS

    23
  • EMI REDUCTION

    24
  • PERIPHERAL OVERVIEW

    25
  • SERIAL PORTS

    25
  • TIMER RATE CONTROL

    25
  • POWER-FAIL RESET

    25
  • POWER-FAIL INTERRUPT

    25
  • WATCHDOG TIMER

    26
  • INTERRUPTS

    27
  • TIMED-ACCESS PROTECTION

    28
  • EPROM PROGRAMMING

    28
  • PROGRAMMING PROCEDURE

    28
  • DS87C530 SECURITY OPTIONS

    29
  • Lock Bits

    29
  • Encryption Array

    29
  • Other EPROM Options

    29
  • DS87C530 Signature

    29
  • ROM-SPECIFIC FEATURES (DS83C530)

    31
  • SECURITY OPTIONS

    31
  • Lock Bits

    31
  • Encryption Array

    31
  • DS83C530 ROM Verification

    32
  • DS83C530 Signature

    32
  • ABSOLUTE MAXIMUM RATINGS

    33
  • DC ELECTRICAL CHARACTERISTICS

    33
  • DC ELECTRICAL CHARACTERISTICS (continued)

    34
  • AC ELECTRICAL CHARACTERISTICS (Note 1)

    35
    • 35
      • PARAMETER

        35
        • 35
          • 35
            • 35
              • MAX

                35
  • MOVX CHARACTERISTICS USING STRETCH MEMORY CYCLES

    36
    • 36
      • PARAMETER

        36
        • 37
          • 37
            • 37
              • 37
                • MOVX CYCLES

                  37
  • EXTERNAL CLOCK CHARACTERISTICS

    37
    • 37
      • 37
        • 37
          • 37
            • 37
              • SYMBOL

                37
                • UNITS

                  37
  • SERIAL PORT MODE 0 TIMING CHARACTERISTICS

    37
    • 37
      • 37
        • 37
          • 37
            • tQVXH

              37
  • EXPLANATION OF AC SYMBOLS

    38
  • POWER-CYCLE TIMING CHARACTERISTICS

    38
  • EPROM PROGRAMMING AND VERIFICATION \(VCC = 4.5V�

    38
  • EXTERNAL PROGRAM MEMORY READ CYCLE

    39
  • EXTERNAL DATA MEMORY READ CYCLE

    39
  • DATA MEMORY WRITE CYCLE

    40
  • DATA MEMORY WRITE WITH STRETCH = 1

    40
  • DATA MEMORY WRITE WITH STRETCH = 2

    41
  • EXTERNAL CLOCK DRIVE

    41
  • SERIAL PORT MODE 0 TIMING

    42
  • POWER-CYCLE TIMING

    43
  • EPROM PROGRAMMING AND VERIFICATION WAVEFORMS

    43
  • PACKAGE INFORMATION

    44
  • PACKAGE INFORMATION (continued)

    45
  • PACKAGE INFORMATION (continued)

    46
  • DATA SHEET REVISION SUMMARY

    47