AT89LP6440-20JU Atmel, AT89LP6440-20JU Datasheet - Page 166
AT89LP6440-20JU
Manufacturer Part Number
AT89LP6440-20JU
Description
MCU 8051 64K FLASH ISP 44PLCC
Manufacturer
Atmel
Series
89LPr
Datasheet
1.AT89LP6440-20MU.pdf
(194 pages)
Specifications of AT89LP6440-20JU
Core Processor
8051
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
38
Program Memory Size
64KB (64K x 8)
Program Memory Type
FLASH
Eeprom Size
8K x 8
Ram Size
4.25K x 8
Voltage - Supply (vcc/vdd)
2.4 V ~ 3.6 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
44-PLCC
Processor Series
AT89x
Core
8051
Data Bus Width
8 bit
Data Ram Size
8 KB
Interface Type
2-Wire, SPI
Maximum Clock Frequency
24 MHz
Number Of Programmable I/os
38
Number Of Timers
3
Operating Supply Voltage
2.7 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
PK51, CA51, A51, ULINK2
Development Tools By Supplier
AT89ISP
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 8 Channel
On-chip Dac
10 bit, 8 Channel
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT89LP6440-20JU
Manufacturer:
Atmel
Quantity:
103
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25.9.2
25.9.3
166
AT89LP6440 - Preliminary
Power-down Sequence
ISP Start Sequence
Figure 25-7. Serial Programming Power-up Sequence
Execute this sequence to power-down the device after programming.
Figure 25-8. 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. Tristate MOSI.
4. Wait at least t
5. Wait no more than t
1. Drive RST low.
2. Drive SS high.
3. Wait t
4. Start programming session.
MISO
MOSI
MISO
MOSI
RST
SCK
V
RST
SCK
V
SS
DD
SS
DD
RLZ
+ t
STL
t
SSD
SSD
SSZ
.
and then tristate SS and SCK.
and bring SS high.
PWRDN
t
PWRUP
and power off VDD.
t
SSZ
HIGH Z
HIGH Z
HIGH Z
HIGH Z
t
POR
+ t
SUT
t
PWRDN
t
ZSS
3706A–MICRO–9/09
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