DS89C420_05 Datasheet, PDF (11/47 Pages) Maxim Integrated Products – Ultra-High-Speed Microcontroller

DS89C420 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
CONDITIONS
Crystal Startup Time
t_CSU
(Note 2)
Power-On Reset Delay
t_POR
(Note 3)
MIN
TYP
MAX UNITS
8
ms
65,536
t_CLCL
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
CONDITIONS
MIN
Oscillator Frequency
1 / t_CLCL
4
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
PROG Pulse Width
t_GLGH
85
Address to Data Valid
t_AVQV
Enable Low to Data Valid
t_ELQV
Data Float After Enable
t_EHQZ
0
PROG High to PROG Low
t_GHGL
10
TYP
MAX
6
UNITS
MHz
100
ms
48t_CLCL
48t_CLCL
48t_CLCL
ms
11 of 47