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AT89LP4052 Fiches technique(PDF) 72 Page - ATMEL Corporation

No de pièce AT89LP4052
Description  8-bit Microcontroller with 2/4-Kbyte Flash
PDF  90 Pages
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Fabricant  ATMEL [ATMEL Corporation]
Site Internet  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89LP4052 Fiches technique(HTML) 72 Page - ATMEL Corporation

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3547F–MICRO–6/06
AT89LP2052/LP4052
22.5.2
Power-down Sequence
Execute this sequence to power-down the device after serial programming.
1.
Tri-state MOSI (P1.5).
2.
Bring SCK (P1.7) to “L”.
3.
Bring RST to “L”.
4.
Bring SS (P1.4) to “L”
5.
Power off Vcc.
Figure 22-23. Serial Programming Power-down Sequence
Note:
The waveforms on this page are not to scale.
22.5.3
ISP Start Sequence
Execute this sequence to enter ISP when the device is already operational.
1.
Bring SS (P1.4) to “H”.
2.
Tri-state MISO (P1.6).
3.
Bring RST to “H”.
4.
Bring SCK (P1.7) to “L”.
Figure 22-24. In-System Programming (ISP) Start Sequence
VCC
RST
SS
SCK
HIGH Z
MISO
HIGH Z
MOSI
VCC
RST
SS
SCK
HIGH Z
MOSI
HIGH Z
MISO
XTAL1



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