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AT89S52-24PU Datasheet(PDF) 28 Page - ATMEL Corporation

Part No. AT89S52-24PU
Description  8-bit Microcontroller with 8K Bytes In-System Programmable Flash
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Maker  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
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 28 page
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28
1919D–MICRO–6/08
AT89S52
25. Serial Programming Characteristics
Figure 25-1. Serial Programming Timing
MOSI
MISO
SCK
t
OVSH
t
SHSL
t
SLSH
t
SHOX
t
SLIV
Table 25-1.
Serial Programming Characteristics, T
A = -40⋅ C to 85⋅ C, VCC = 4.0 - 5.5V (Unless Otherwise Noted)
Symbol
Parameter
Min
Typ
Max
Units
1/tCLCL
Oscillator Frequency
3
33
MHz
tCLCL
Oscillator Period
30
ns
tSHSL
SCK Pulse Width High
8 tCLCL
ns
tSLSH
SCK Pulse Width Low
8 tCLCL
ns
tOVSH
MOSI Setup to SCK High
tCLCL
ns
tSHOX
MOSI Hold after SCK High
2 tCLCL
ns
tSLIV
SCK Low to MISO Valid
10
16
32
ns
tERASE
Chip Erase Instruction Cycle Time
500
ms
tSWC
Serial Byte Write Cycle Time
64 tCLCL + 400
µs




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