AT89LP51ED2-20MU Atmel, AT89LP51ED2-20MU Datasheet - Page 252

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

Specifications of AT89LP51ED2-20MU

• Rohs: yes
• Core: 8051
• 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: VQFN-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
• Processor Series: AT89x
• Program Memory Type: Flash
• Factory Pack Quantity: 360

Table of Contents (Continued)
iv
AT89LP51RD2/ED2/ID2 Preliminary
19 Two-Wire Serial Interface .................................................................... 136
20 Dual Analog Comparators ................................................................... 159
21 Digital-to-Analog/Analog-to-Digital Converter .................................. 166
22 Instruction Set Summary .................................................................... 175
23 On-Chip Debug System ....................................................................... 185
24 Flash Memory Programming .............................................................. 187
18.4
18.5
18.6
19.1
19.2
19.3
19.4
19.5
19.6
20.1
20.2
20.3
21.1
21.2
21.3
21.4
21.5
21.6
21.7
22.1
23.1
23.2
23.3
24.1
24.2
24.3
24.4
Error Conditions .............................................................................................132
Serial Clock Timing ........................................................................................133
Registers .......................................................................................................134
Data Transfer and Frame Format ..................................................................137
Multi-master Bus Systems, Arbitration and Synchronization .........................139
Overview of the TWI Module .........................................................................141
Register Overview .........................................................................................143
Using the TWI ................................................................................................144
Transmission Modes .....................................................................................146
Analog Input Muxes .......................................................................................160
Internal Reference Voltage ............................................................................161
Comparator Interrupt Debouncing .................................................................161
ADC Operation ..............................................................................................168
Temperature Sensor ......................................................................................169
DAC Operation ..............................................................................................169
Clock Selection ..............................................................................................170
Starting a Conversion ....................................................................................171
Noise Considerations ....................................................................................171
Registers .......................................................................................................172
Instruction Set Extensions .............................................................................179
Physical Interface ..........................................................................................185
Software Breakpoints ....................................................................................186
Limitations of On-Chip Debug .......................................................................186
Memory Organization ....................................................................................188
User Configuration Fuses ..............................................................................190
Flash Hardware Security ...............................................................................191
In-Application Programming (IAP) .................................................................192
3714A–MICRO–7/11