AT89LP428-20MU ATMEL [ATMEL Corporation], AT89LP428-20MU Datasheet - Page 123
AT89LP428-20MU
Manufacturer Part Number
AT89LP428-20MU
Description
8-bit Microcontroller with 4K/8K Bytes In-System Programmable Flash
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.AT89LP428-20MU.pdf
(149 pages)
- Current page: 123 of 149
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23.9.2
3654A–MICRO–8/09
Power-down Sequence
Figure 23-5. Serial Programming Power-up Sequence
Execute this sequence to power-down the device after programming.
Figure 23-6. Serial Programming Power-down Sequence
1. Drive SCK low.
2. Wait at least t
3. Tristate MOSI.
4. Wait at least t
5. Wait no more than t
MISO
MOSI
MISO
MOSI
SCK
RST
V
RST
SCK
V
SS
CC
SS
CC
t
SSD
SSD
SSZ
and then tristate SS and SCK.
and bring SS high.
PWRDN
t
PWRUP
and power off V
t
SSZ
HIGH Z
HIGH Z
HIGH Z
HIGH Z
t
POR
+ t
cc
.
SUT
t
PWRDN
t
ZSS
AT89LP428/828
123
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