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AT89LP428 датащи(PDF) 136 Page - ATMEL Corporation

номер детали AT89LP428
подробное описание детали  8-bit Microcontroller with 4K/8K Bytes In-System Programmable Flash
PDF  149 Pages
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производитель  ATMEL [ATMEL Corporation]
домашняя страница  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89LP428 датащи(HTML) 136 Page - ATMEL Corporation

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3654A–MICRO–8/09
AT89LP428/828
Figure 24-15. Shift Register Mode Timing Waveform
24.9
Test Conditions
24.9.1
AC Testing Input/Output Waveform(1)
Note:
1. AC Inputs during testing are driven at V
CC - 0.5V for a logic “1” and 0.45V for a logic “0”. Timing measurements are made at
VIH min. for a logic “1” and VIL max. for a logic “0”.
24.9.2
Float Waveform(1)
Note:
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
float when 100 mV change from the loaded VOH/VOL level occurs.
24.8
Serial Port Timing: Shift Register Mode
The values in this table are valid for V
CC = 2.4V to 5.5V and Load Capacitance = 80 pF.
Symbol
Parameter
Variable Oscillator
Units
Min
Max
tXLXL
Serial Port Clock Cycle Time
2tCLCL -15
µs
t
QVXH
Output Data Setup to Clock Rising Edge
t
CLCL -15
ns
tXHQX
Output Data Hold after Clock Rising Edge
tCLCL -15
ns
tXHDX
Input Data Hold after Clock Rising Edge
0
ns
t
XHDV
Input Data Valid to Clock Rising Edge
15
ns
01
2
3
4
5
6
7
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Clock
Write to SBUF
Output Data
Clear RI
Input Data



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