AT89LP428-20JU Atmel, AT89LP428-20JU Datasheet - Page 118
AT89LP428-20JU
Manufacturer Part Number
AT89LP428-20JU
Description
MCU 8051 4K FLASH SPI 32PLCC
Manufacturer
Atmel
Series
89LPr
Datasheet
1.AT89LP428-20AU.pdf
(149 pages)
Specifications of AT89LP428-20JU
Core Processor
8051
Core Size
8-Bit
Speed
20MHz
Connectivity
SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
30
Program Memory Size
4KB (4K x 8)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
768 x 8
Voltage - Supply (vcc/vdd)
2.4 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
32-PLCC
Processor Series
AT89x
Core
8051
3rd Party Development Tools
PK51, CA51, A51, ULINK2
Development Tools By Supplier
AT89ISP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Data Converters
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
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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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