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AT80F51-16PI Datasheet(PDF) 11 Page - ATMEL Corporation

Part # AT80F51-16PI
Description  8-Bit Microcontroller with 4K Bytes QuickFlash Memory
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT80F51-16PI Datasheet(HTML) 11 Page - ATMEL Corporation

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AT80F51
3-13
Serial Port Timing: Shift Register Mode Test Conditions
(VCC = 5.0 V ± 20%; Load Capacitance = 80 pF)
Shift Register Mode Timing Waveforms
Symbol
Parameter
12 MHz Osc
Variable Oscillator
Units
Min
Max
Min
Max
tXLXL
Serial Port Clock Cycle Time
1.0
12tCLCL
µs
tQVXH
Output Data Setup to Clock Rising Edge
700
10tCLCL-133
ns
tXHQX
Output Data Hold After Clock Rising Edge
50
2tCLCL-117
ns
tXHDX
Input Data Hold After Clock Rising Edge
0
0
ns
tXHDV
Clock Rising Edge to Input Data Valid
700
10tCLCL-133
ns
t
XHDV
t
QVXH
t
XLXL
t
XHDX
t
XHQX
ALE
INPUT DATA
CLEAR RI
OUTPUT DATA
WRITE TO SBUF
INSTRUCTION
CLOCK
0
0
1
1
2
2
3
3
4
4
5
5
6
6
7
7
SET TI
SET RI
8
VALID
VALID
VALID
VALID
VALID
VALID
VALID
VALID
Float Waveforms(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.
V
LOAD
+ 0.1V
Timing Reference
Points
V
LOAD
- 0.1V
LOAD
V
V
OL
+ 0.1V
V
OL
- 0.1V
AC Testing Input/Output Waveforms(1)
Note:
1.
AC Inputs during testing are driven at VCC - 0.5V for
a logic 1 and 0.45V for a logic 0. Timing measure-
ments are made at VIH min. for a logic 1 and VIL
max. for a logic 0.
0.45V
TEST POINTS
V
- 0.5V
CC
0.2 V
+ 0.9V
CC
0.2 V
- 0.1V
CC


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