AT89LP216-20PI ATMEL [ATMEL Corporation], AT89LP216-20PI Datasheet - Page 73
AT89LP216-20PI
Manufacturer Part Number
AT89LP216-20PI
Description
Microcontroller with 2K Bytes Flash
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.AT89LP216-20PI.pdf
(90 pages)
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23.8.3
23.8.4
3621A–MICRO–6/06
ISP Start Sequence
ISP Exit Sequence
Execute this sequence to exit CPU execution mode and enter ISP mode when the device has
passed Power-On Reset and is already operational.
Figure 23-7. In-System Programming (ISP) Start Sequence
Execute this sequence to exit ISP mode and resume CPU execution mode.
Figure 23-8. In-System Programming (ISP) Exit Sequence
Note:
1. Drive RST low.
2. Drive SS high.
3. Wait t
4. Start programming session.
1. Drive SCK low.
1. Wait at least t
2. Tristate MOSI.
3. Wait at least t
4. Tristate SCK.
5. Wait t
XTAL1
The waveforms on this page are not to scale.
MISO
MOSI
RST
SCK
V
SS
RLZ
RHZ
CC
XTAL1
MISO
MOSI
RST
SCK
V
SS
+ t
CC
and tristate SS.
STL
SSD
SSZ
.
and bring RST high.
and drive SS high.
t
SSD
t
SSZ
t
t
RLZ
RHZ
HIGH Z
HIGH Z
AT89LP216 [Preliminary]
t
STL
HIGH Z
HIGH Z
t
ZSS
t
SSE
73
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