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DS87C530
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DS87C530/DS83C530 EPROM/ROM M
icrocontrollers with Real-Time Clock
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Figure 5. Invoking and Clearing PMM
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DS87C530/DS83C530
1
ORDERING INFORMATION
2
DETAILED DESCRIPTION
3
PIN DESCRIPTION
4
PIN DESCRIPTION (continued)
5
COMPATIBILITY
7
PERFORMANCE OVERVIEW
7
INSTRUCTION SET SUMMARY
7
SPECIAL FUNCTION REGISTERS
8
SM0/FE_0
9
SM0/FE_1
9
CP/ RL2
9
NONVOLATILE FUNCTIONS
10
REAL-TIME CLOCK
10
NONVOLATILE RAM
11
CRYSTAL AND BACKUP SOURCES
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
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
EPROM PROGRAMMING
28
PROGRAMMING PROCEDURE
28
DS87C530 SECURITY OPTIONS
29
Lock Bits
29
Encryption Array
29
Other EPROM Options
29
DS87C530 Signature
29
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SECURITY OPTIONS
31
DS83C530 ROM Verification
32
DS83C530 Signature
32
ABSOLUTE MAXIMUM RATINGS
33
RD Low to Address Float
36
EXPLANATION OF AC SYMBOLS
38
DATA MEMORY WRITE CYCLE
40
EXTERNAL CLOCK DRIVE
41
SERIAL PORT MODE 0 TIMING
42
POWER-CYCLE TIMING
43
PACKAGE INFORMATION
44
DATA SHEET REVISION SUMMARY
45
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