AT89LP51ED2-20JU Atmel, AT89LP51ED2-20JU Datasheet - Page 44
AT89LP51ED2-20JU
Manufacturer Part Number
AT89LP51ED2-20JU
Description
8-bit Microcontrollers - MCU 64KB 20MHz 2.4V-5.5V
Manufacturer
Atmel
Datasheet
1.AT89LP51ED2-20AAU.pdf
(254 pages)
Specifications of AT89LP51ED2-20JU
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
PLCC-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
27
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
- Current page: 44 of 254
- Download datasheet (7Mb)
6.1
44
Crystal Oscillator A
AT89LP51RD2/ED2/ID2 Preliminary
Table 6-1.
Table 6-2.
When enabled, internal inverting oscillator amplifier A is connected between XTAL1A and
XTAL2A for connection to an external quartz crystal or ceramic resonator. The oscillator may
operate in either high-speed or low-power mode. Low-power mode is intended for crystals of 12
MHz or less and consumes less power than the higher speed mode. The configuration as shown
in
capacitors C1 and C2 may be reduced due to the on-chip capacitance of the XTAL1A and
XTAL2A inputs (approximately 10 pF each). When using the crystal oscillator, P4.6 and P4.7 will
have their inputs and outputs disabled. Also, XTAL2A in crystal oscillator mode should not be
used to directly drive a board-level clock without a buffer.
An optional 5 MΩ on-chip resistor can be connected between XTAL1A and GND. This resistor
can improve the startup characteristics of the oscillator especially at higher frequencies. The
resistor can be enabled/disabled with the R1 User Fuse
page
Figure 6-3.
Note:
Figure 6-3
Clock Source A
Clock Source B
190.)
Fuse 1
Fuse 1
1. C1, C2 = 5–15 pF for Crystals
1
1
0
0
1
0
0
applies for both high and low power oscillators. Note that in some cases, external
Clock Source A Settings
Clock Source B Settings (AT89LP51ID2 Only)
Crystal Oscillator A Connections
= 5–15 pF for Ceramic Resonators
Clock Source A
Clock Source B
Fuse 0
Fuse 0
1
0
1
0
–
1
0
C2
C1
Selected Clock Source
High Speed Crystal Oscillator A (f > 12 MHz)
Low Power Crystal Oscillator A (f ≤ 12 MHz)
External Clock on XTAL1A
Internal 8.0 MHz RC Oscillator
Selected Clock Source
Low Frequency Crystal Oscillator B (32 kHz)
External Clock on XTAL1B
Internal 8.0 MHz RC Oscillator
~10 pF
~10 pF
(See “User Configuration Fuses” on
R1
~5 MΩ
3714A–MICRO–7/11
Related parts for AT89LP51ED2-20JU
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
DEV KIT FOR AVR/AVR32
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Low-Voltage Voice-Switched IC for Hands-Free Operation
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
AM-FM Receiver IC U4255BM-M
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Monolithic Integrated Feature Phone Circuit
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Multistandard Video-IF and Quasi Parallel Sound Processing
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
High-performance EE PLD
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
8-bit Flash Microcontroller
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
2-Wire Serial EEPROM
Manufacturer:
ATMEL Corporation
Datasheet: