AT89LP51ED2-20AU Atmel, AT89LP51ED2-20AU Datasheet - Page 78

• Manufacturer Part Number: AT89LP51ED2-20AU
• Description: 8-bit Microcontrollers - MCU 64KB 20MHz 2.4V-5.5V
• Manufacturer: Atmel

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

78
AT89LP51RD2/ED2/ID2 Preliminary
Table 12-7.
Port Pin
P3.7
P4.0
P4.1
P4.2
P4.4
P4.5
P4.6
P4.7
Port Pin Alternate Functions
PxM0.y
P3M0.7
P4M0.0
P4M0.1
P4M0.2
P4M0.4
P4M0.5
P4M0.6
P4M0.7
Configuration Bits
PxM1.y
P3M1.7
P4M1.0
P4M1.1
P4M1.2
P4M1.4
P4M1.5
P4M1.6
P4M1.7
Alternate
Function
XTAL2B
XTAL1A
XTAL2A
PSEN
SDA
SCL
ALE
RD
Notes
open-drain
open-drain
OSCB must be disabled or in
internal oscillator or external clock
modes to use P4.2(AT89LP51ID2)
Set AO in AUXR to use P4.4
OSCA must be set to internal RC
mode to use P4.6
OSCA must be set to internal RC
or external clock modes to use
P4.7
3714A–MICRO–711