AT89LP51ED2-20JU Atmel, AT89LP51ED2-20JU Datasheet - Page 251

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

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

Table of Contents (Continued)
3714A–MICRO–7/11
14 Timer 2 .................................................................................................... 89
15 Programmable Counter Array (PCA) .................................................... 97
16 Hardware Watchdog Timer ................................................................. 106
17 Serial Interface (UART) ........................................................................ 109
18 Enhanced Serial Peripheral Interface ................................................ 127
13.3
13.4
13.5
13.6
14.1
14.2
14.3
14.4
14.5
15.1
15.2
15.3
15.4
15.5
15.6
15.7
16.1
16.2
17.1
17.2
17.3
17.4
17.5
17.6
17.7
18.1
18.2
18.3
Mode 1 – 16-bit Auto-Reload Timer/Counter ...................................................83
Mode 2 – 8-bit Auto-Reload Timer/Counter .....................................................84
Mode 3 – 8-bit Split Timer ...............................................................................84
Pulse Width Modulation ...................................................................................85
Timer 2 Registers ............................................................................................91
Capture Mode ..................................................................................................92
Auto-Reload Mode ...........................................................................................93
Baud Rate Generator ......................................................................................95
Frequency Generator (Programmable Clock Out) ...........................................96
PCA Timer/Counter .........................................................................................97
PCA Modules .................................................................................................100
PCA Capture Mode .......................................................................................103
16-bit Software Timer/ Compare Mode .........................................................103
High Speed Output Mode ..............................................................................104
Pulse Width Modulator Mode ........................................................................105
PCA Watchdog Timer ....................................................................................106
Software Reset ..............................................................................................107
WDT Registers ..............................................................................................108
Multiprocessor Communications ...................................................................111
Baud Rates ....................................................................................................111
Framing Error Detection ................................................................................116
Automatic Address Recognition ....................................................................116
More About Mode 0 .......................................................................................118
More About Mode 1 .......................................................................................122
More About Modes 2 and 3 ...........................................................................124
Interface Description ......................................................................................128
Master Operation ...........................................................................................131
Slave Operation .............................................................................................131
AT89LP51RD2/ED2/ID2 Preliminary
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