AT89LP51ED2-20AU Atmel, AT89LP51ED2-20AU Datasheet - Page 69

• 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

Figure 11-1. Keyboard Block Diagram
3714A–MICRO–7/11
(P1.7) GPI7
(P1.6) GPI6
(P1.5) GPI5
(P1.4) GPI4
(P1.3) GPI3
(P1.2) GPI2
(P1.1) GPI1
(P1.0) GPI0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
KBLS
7
6
5
4
3
2
1
0
KBMOD
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
7
6
5
4
3
2
1
0
AT89LP51RD2/ED2/ID2 Preliminary
7
6
5
4
3
2
1
0
KBE
CLK
D Q
D Q
D Q
D Q
D Q
D Q
D Q
D Q
KBF
7
6
5
4
3
2
1
0
Interrupt
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