at89lp428-25pu ATMEL Corporation, at89lp428-25pu Datasheet - Page 118
at89lp428-25pu
Manufacturer Part Number
at89lp428-25pu
Description
8-bit Microcontroller With 4k/8k Bytes In-system Programmable Flash
Manufacturer
ATMEL Corporation
Datasheet
1.AT89LP428-25PU.pdf
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Figure 23-4. ISP Command Packet
118
MOSI
MISO
SCK
SS
AT89LP428/828
Preamble 1
X
data byte. After each data byte has been transmitted, the byte address is incremented to point to
the next data byte. This allows a page command to linearly sweep the bytes within a page. If the
byte address is incremented past the last byte in the page, the byte address will roll over to the
first byte in the same page. While loading bytes into the page buffer, overwriting previously
loaded bytes will result in data corruption.
For a summary of available commands, see
Figure 23-3. Command Sequence Flow Chart
Preamble 2
X
7
6 5 4 3 2 1
Input Preamble 1
Input Preamble 2
Opcode
Input Address
Input Address
Input Opcode
Input/Output
X
High Byte
Low Byte
(AAH)
(55H)
Data
0
7
6 5 4 3 2 1
Address High
Table 23-3 on page
X
0
Address +1
7
6 5 4 3 2 1
Address Low
X
119.
0
7
7
6 5 4 3 2 1
6 5 4 3 2 1
Data Out
Data In
3654A–MICRO–8/09
0
0
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