AT89LP51ED2-20AU Atmel, AT89LP51ED2-20AU Datasheet - Page 221
AT89LP51ED2-20AU
Manufacturer Part Number
AT89LP51ED2-20AU
Description
8-bit Microcontrollers - MCU 64KB 20MHz 2.4V-5.5V
Manufacturer
Atmel
Datasheet
1.AT89LP51ED2-20AAU.pdf
(254 pages)
Specifications of AT89LP51ED2-20AU
Rohs
yes
Core
8051
Processor Series
AT89x
Data Bus Width
8 bit
Maximum Clock Frequency
20 MHz
Program Memory Size
64 KB
Data Ram Size
256 B
On-chip Adc
Yes
Operating Supply Voltage
2.4 V to 5.5 V
Operating Temperature Range
- 40 C to + 85 C
Package / Case
TQFP-44
Mounting Style
SMD/SMT
Data Rom Size
4 KB
Interface Type
2-Wire, SPI, UART
Number Of Programmable I/os
36
Number Of Timers
3
Program Memory Type
Flash
Factory Pack Quantity
160
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24.6.5.2
24.6.5.3
3714A–MICRO–7/11
Power-down Sequence
ISP Start Sequence
Figure 24-22. Serial Programming Power-up Sequence
Execute this sequence to power-down the device after programming.
Figure 24-23. Serial Programming Power-down 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.
1. Drive SCK low.
2. Wait at least t
3. Wait at least t
4. Wait at least t
5. Wait no more than t
1. Drive RST high.
2. Wait t
3. Drive SCK low.
4. Start programming session.
MISO
MOSI
RST
SCK
V
SS
DD
MISO
MOSI
RST
SCK
V
RLZ
SS
DD
+ t
STL
SSD
RHZ
SSZ
.
t
and tristate SCK.
SSD
and Tristate MOSI.
and drive RST low.
PWRDN
t
PWRUP
AT89LP51RD2/ED2/ID2 Preliminary
and power off VDD.
HIGH Z
HIGH Z
t
t
SSZ
POR
+ t
SUT
HIGH Z
HIGH Z
t
ZSS
t
PWRDN
221
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