AT89LP6440 Atmel Corporation, AT89LP6440 Datasheet - Page 42

• Manufacturer Part Number: AT89LP6440
• Manufacturer: Atmel Corporation

Specifications of AT89LP6440

• Flash (kbytes): 64 Kbytes
• Max. Operating Frequency: 20 MHz
• Cpu: 8051-1C
• Max I/o Pins: 38
• Spi: 1
• Twi (i2c): 1
• Uart: 1
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 153.8
• Sram (kbytes): 4.25
• Eeprom (bytes): 8192
• Self Program Memory: IAP
• Operating Voltage (vcc): 2.4 to 3.6
• Timers: 3
• Isp: SPI/OCD
• Watchdog: Yes

Figure 9-1.
Figure 9-2.
Table 9-2.
42
Symbol
EA
EC
ET2
ES
ET1
EX1
ET0
EX0
IE = A8H
Bit Addressable
Bit
Clock Cycles
Clock Cycles
Instruction
Instruction
AT89LP3240/6440
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
Timer 2 Interrupt Enable
Serial Port Interrupt Enable
Timer 1 Interrupt Enable
External Interrupt 1 Enable
Timer 0 Interrupt Enable
External Interrupt 0 Enable
INT0
INT0
Minimum Interrupt Response Time
Maximum Interrupt Response Time
IE – Interrupt Enable Register
IE0
IE0
EA
7
Cur. Instr.
rupt system, the response time is always more than 5 clock cycles and less than 21 clock cycles.
See
.
Ack.
1
1
EC
Figure 9-1
6
RETI
LCALL
and
ET2
5
Figure
5
6
1st ISR Instr.
9-2.
ES
4
MAC AB
ET1
Ack.
3
15
EX1
2
LCALL
Reset Value = 0000 0000B
ET0
1
21
1st ISR Instr.
3706C–MICRO–2/11
EX0
0