DS89C420 Datasheet, PDF (54/59 Pages) Dallas Semiconductor – Ultra-High-Speed Microcontroller

POWER CYCLE TIMING CHARACTERISTICS
(V_CC = 4.5V to 5.5V; T_A = -40°C to +85°C) (Note 1)
PARAMETER
SYMBOL MIN
TYP
Crystal Startup Time
t_CSU
8
Power-On Reset Delay
t_POR
65,536
DS89C420
MAX
UNITS
ms
t_CLCL
NOTES
2
3
Note 1: Specifications to -40°C are guaranteed by design and not production tested.
Note 2: Startup time for a crystal varies with load capacitance and manufacturer. Time shown is for a 11.0592MHz crystal manufactured by Fox
Electronics.
Note 3: Reset delay is a synchronous counter of crystal oscillations after crystal startup. Counting begins when the level on the XTAL1 pin
meets the VIH2 criteria. At 33MHz, this time is 1.99ms.
FLASH MEMORY PROGRAMMING CHARACTERISTICS
(V_CC = 4.5V to 5.5V; T_A = +21°C to +27°C)
PARAMETER
SYMBOL MIN
TYP
Oscillator Frequency
1 / t_CLCL
4
Address Setup to PROG Low
t_AVGL
48t_CLCL
Address Hold After PROG
Data Setup to PROG Low
t_GHAX
t_DVGL
48t_CLCL
48t_CLCL
Data Hold After PROG
t_GHDX
48t_CLCL
PROG Pulse Width
Address to Data Valid
t_GLGH
85
t_AVQV
Enable Low to Data Valid
t_ELQV
Data Float After Enable
PROG High to PROG Low
t_EHQZ
0
t_GHGL
10
MAX
6
UNITS
MHz
100
ms
48t_CLCL
48t_CLCL
48t_CLCL
ms
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