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DS87C530/DS83C530 EPROM/ROM Microcontrollers with Real-Time Clock
38 of 45
EXPLANATION OF AC SYMBOLS
In an effort to remain compatible with the original 8051 family, this device specifies the same parameters
as such devices, using the same symbols. For completeness, the following is an explanation of the
symbols.
t Time
A Address
C Clock
D Input data
H Logic level high
L Logic level low
I Instruction
P PSEN
Q Output data
R RD signal
V Valid
W WR signal
X No longer a valid logic
level
Z Tri-State
POWER-CYCLE TIMING CHARACTERISTICS
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Cycle Startup Time t
CSU
1.8 ms 1
Power-On Reset Delay t
POR
65,536 t
CLCL
2
Note 1:
Startup time for crystals varies with load capacitance and manufacturer. Time shown is for an 11.0592MHz crystal manufactured by
Fox.
Note 2:
Reset delay is a synchronous counter of crystal oscillations after crystal startup. At 33MHz, this time is 1.99ms.
EPROM PROGRAMMING AND VERIFICATION
(V
CC
= 4.5V to 5.5V, T
A
= +21°C to +27°C.)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Programming Voltage V
PP
12.5 13.0 V 1
Programming Supply Current I
PP
50 mA
Oscillator Frequency 1/t
CLCL
4 6 MHz
Address Setup to PROG Low
t
AVGL
48t
CLCL
Address Hold after PROG
t
GHAX
48t
CLCL
Data Setup to PROG Low
t
DVGL
48t
CLCL
Data Hold after PROG
t
GHDX
48t
CLCL
Enable High to V
PP
t
EHSH
48t
CLCL
V
PP
Setup to PROG Low
t
SHGL
10
s
V
PP
Hold after PROG
t
GHSL
10
s
PROG Width
t
GLGH
90 110
s
Address to Data Valid t
AVQV
48t
CLCL
Enable Low to Data Valid t
ELQV
48t
CLCL
Data Float after Enable t
EHQZ
0 48t
CLCL
PROG High to PROG Low
t
GHGL
10
s
Note 1: All voltages are referenced to ground.
- 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
- 30 of 45 30
- 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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