AT89LP4052 Atmel Corporation, AT89LP4052 Datasheet - Page 19

• Manufacturer Part Number: AT89LP4052
• Manufacturer: Atmel Corporation

Specifications of AT89LP4052

• Flash (kbytes): 4 Kbytes
• Max. Operating Frequency: 20 MHz
• Cpu: 8051-1C
• Max I/o Pins: 15
• Spi: 1
• Uart: 1
• Sram (kbytes): 0.25
• Operating Voltage (vcc): 2.4 to 5.5
• Timers: 2
• Isp: SPI
• Watchdog: Yes

Table 14-2.
Table 14-3.
3547J–MICRO–10/09
Symbol
EA
EC
ES
ET1
EX1
ET0
EX0
Symbol
PC
PS
PT1
PX1
PT0
PX0
IE = A8H
Bit Addressable
Bit
IP = B8H
Bit Addressable
Bit
Function
Global enable/disable. All interrupts are disabled when EA = 0. When EA = 1, each interrupt source is enabled/disabled
by setting /clearing its own enable bit.
Comparator Interrupt Enable
Serial Port Interrupt Enable
Timer 1 Interrupt Enable
External Interrupt 1 Enable
Timer 0 Interrupt Enable
External Interrupt 0 Enable
Function
Comparator Interrupt Priority Low
Serial Port Interrupt Priority Low
Timer 1 Interrupt Priority Low
External Interrupt 1 Priority Low
Timer 0 Interrupt Priority Low
External Interrupt 0 Priority Low
IE
IP
– Interrupt Enable Register
– Interrupt Priority Register
EA
–
7
7
EC
PC
6
6
–
5
–
5
ES
PS
4
4
ET1
PT1
3
3
EX1
PX1
AT89LP2052/LP4052
2
2
Reset Value = X0X0 0000B
Reset Value = 00X0 0000B
ET0
PT0
1
1
EX0
PX0
0
0
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