DS89C420_02 Datasheet, PDF (54/58 Pages) Maxim Integrated Products – Ultra-High-Speed Microcontroller

DS89C420
Table 20. POWER CYCLE TIMING CHARACTERISTICS
(V_CC = 4.5V to 5.5V; T _A = -40°C to +85°C) (Note 1)
PARAMETER
SYMBOL MIN
TYP
MAX UNITS NOTES
Crystal Startup Time
t_CSU
8
ms
2
Power-On Reset Delay
t_POR
65,536
t_CLCL
3
NOTES:
1) Specifications to -40°C are guaranteed by design and not production tested.
2) Startup time for a crystal varies with load capacitance and manufacturer. Time shown is for a
11.0592MHz crystal manufactured by Fox Electronics.
3) Reset delay is a synchronous counter of crystal oscillations after crystal startup. Counting begins
when the level on the XTAL1 pin meets the V_IH2 criteria. At 33MHz, this time is 1.99ms.
Table 21. FLASH MEMORY PROGRAMMING CHARACTERISTICS
(V_CC = 4.5V to 5.5V; T _A = +21°C to +27°C)
PARAMETER
SYMBOL MIN
TYP
MAX UNITS
Oscillator Frequency
1 / t_CLCL
4
6
MHz
Address Setup to PROG Low
t_AVGL
48t_CLCL
Address Hold After PROG
Data Setup to PROG Low
Data Hold After PROG
t_GHAX
t_DVGL
t_GHDX
48t_CLCL
48t_CLCL
48t_CLCL
PROG Pulse Width
Address to Data Valid
t_GLGH
85
t_AVQV
100
µs
48t_CLCL
Enable Low to Data Valid
t_ELQV
48t_CLCL
Data Float After Enable
PROG High to PROG Low
t_EHQZ
0
t_GHGL
10
48t_CLCL
µs
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