AT89LP51ED2-20AU Atmel, AT89LP51ED2-20AU Datasheet - Page 65

• 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

9.3
Table 9-3.
Table 9-4.
3714A–MICRO–7/11
Symbol
EA
EC
ET2
ES
ET1
EX1
ET0
EX0
Symbol
EADC
ECMP
ESPI
ETWI
EKBD
IEN0 = A8H
Bit Addressable
Bit
IEN1 = B1H
Bit Addressable
Bit
Interrupt Registers
Function
Global Interrupt Enable
All interrupts are disabled when EA = 0. When EA = 1, each interrupt source is enabled/disabled by setting /clearing its own enable bit.
PCA Interrupt Enable
Clear to disable the PCA interrupt. Set to enable the PCA interrupt when EA = 1.
Timer 2 Interrupt Enable
Clear to disable the Timer 2 interrupt. Set to enable the Timer 2 interrupt when EA = 1.
Serial Port Interrupt Enable
Clear to disable the UART interrupt. Set to enable the UART interrupt when EA = 1.
Timer 1 Interrupt Enable
Clear to disable the Timer 1 interrupt. Set to enable the Timer 1 interrupt when EA = 1.
External Interrupt 1 Enable.
Clear to disable the INT1 interrupt. Set to enable the INT1 interrupt when EA = 1.
Timer 0 Interrupt Enable
Clear to disable the Timer 0 interrupt. Set to enable the Timer 0 interrupt when EA = 1.
External Interrupt 0 Enable
Clear to disable the INT0 interrupt. Set to enable the INT0 interrupt when EA = 1.
Function
ADC Interrupt Enable.
Clear to disable the ADC interrupt. Set to enable the ADC interrupt when EA = 1.
Analog COmparator Interrupt Enable
Clear to disable the Analog Comparator interrupt. Set to enable the Analog Comparator interrupt when EA = 1.
SPI Interrupt Enable
Clear to disable the SPI interrupt. Set to enable the SPI interrupt when EA = 1.
TWI Interrupt Enable
Clear to disable the TWI interrupt. Set to enable the TWI interrupt when EA = 1.
Keyboard Interrupt Enable
Clear to disable the Keyboard interrupt. Set to enable the Keyboard interrupt when EA = 1.
IEN0 – Interrupt Enable Register 0
IEN1 – Interrupt Enable Register 1
EA
7
–
7
EC
6
–
6
EADC
ET2
5
5
AT89LP51RD2/ED2/ID2 Preliminary
ECMP
ES
4
4
ET1
3
–
3
ESPI
EX1
2
2
Reset Value = 0000 0000B
Reset Value = 0000 0000B
ETWI
ET0
1
1
EKBD
EX0
0
0
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