AT89S8253-24PSC ATMEL [ATMEL Corporation], AT89S8253-24PSC Datasheet - Page 50
AT89S8253-24PSC
Manufacturer Part Number
AT89S8253-24PSC
Description
8-bit Microcontroller with 12K Bytes Flash and 2K Bytes EEPROM
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.AT89S8253-24PSC.pdf
(59 pages)
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37. Serial Port Timing: Shift Register Mode Test Conditions
The values in this table are valid for V
38. Shift Register Mode Timing Waveforms
39. AC Testing Input/Output Waveforms
Note:
40. Float Waveforms
Note:
50
Symbol
t
t
t
t
t
XLXL
QVXH
XHQX
XHDX
XHDV
1. AC Inputs during testing are driven at V
1. For timing purposes, a port pin is no longer floating when a 100 mV change from load voltage occurs. A port pin begins to
AT89S8253
min. for a logic 1 and V
float when a 100 mV change from the loaded V
Parameter
Serial Port Clock Cycle Time
Output Data Setup to Clock Rising Edge
Output Data Hold after Clock Rising Edge
Input Data Hold after Clock Rising Edge
Input Data Valid to Clock Rising Edge
(1)
IL
max. for a logic 0.
CC
= 2.7V to 5.5V and Load Capacitance = 80 pF.
CC
- 0.5V for a logic 1 and 0.45V for a logic 0. Timing measurements are made at V
OH
/V
OL
(1)
level occurs.
10t
12t
2t
CLCL
CLCL
CLCL
t
Min
CLCL
Variable Oscillator
0
-15
-15
-15
Max
3286L–MICRO–8/08
Units
µs
ns
ns
ns
ns
IH
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