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AT89 Datasheet(PDF) 30 Page - ATMEL Corporation

Part # AT89
Description  8-Bit Microcontroller with 8K Bytes Flash
PDF  41 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89 Datasheet(HTML) 30 Page - ATMEL Corporation

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AT89S8252
0401F–MICRO–11/03
Serial Downloading Waveforms
Serial Programming Characteristics
Figure 16. Serial Programming Timing
SERIAL CLOCK INPUT
SERIAL DATA INPUT
SCK/P1.7
MOSI/P1.5
MISO/P1.6
SERIAL DATA OUTPUT
0
1
2
3
4
5
6
7
MSB
MSB
LSB
LSB
MOSI
MISO
SCK
t
OVSH
t
SHSL
t
SLSH
t
SHOX
Table 11. Serial Programming Characteristics, T
A = -40° C to 85° C, VCC = 4.0 - 6.0V (Unless Otherwise Noted)
Symbol
Parameter
Min
Typ
Max
Units
1/tCLCL
Oscillator Frequency
0
24
MHz
tCLCL
Oscillator Period
41.6
ns
tSHSL
SCK Pulse Width High
24 tCLCL
ns
tSLSH
SCK Pulse Width Low
24 t
CLCL
ns
tOVSH
MOSI Setup to SCK High
tCLCL
ns
tSHOX
MOSI Hold after SCK High
2 tCLCL
ns



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