DS87C530_05 Datasheet, PDF (38/47 Pages) Dallas Semiconductor – EPROM/ROM Microcontrollers with Real-Time Clock

DS87C530/DS83C530 EPROM/ROM Microcontrollers with Real-Time Clock
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
Power-On Reset Delay
t_CSU
1.8
ms
1
t_POR
65,536
t_CLCL
2
Note 1:
Note 2:
Startup time for crystals varies with load capacitance and manufacturer. Time shown is for an 11.0592MHz crystal manufactured by
Fox.
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
Programming Voltage
Programming Supply Current
Oscillator Frequency
Address Setup to PROG Low
V_PP
I_PP
1/t_CLCL
t_AVGL
12.5
4
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
V_PP Setup to PROG Low
V_PP Hold after PROG
PROG Width
t_EHSH
t_SHGL
t_GHSL
t_GLGH
48t_CLCL
10
10
90
Address to Data Valid
Enable Low to Data Valid
Data Float after Enable
PROG High to PROG Low
t_AVQV
t_ELQV
t_EHQZ
0
t_GHGL
10
Note 1: All voltages are referenced to ground.
TYP
MAX
13.0
50
6
UNITS
V
mA
MHz
NOTES
1
ms
ms
110
ms
48t_CLCL
48t_CLCL
48t_CLCL
ms
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