AT89LP6440-20PU Atmel, AT89LP6440-20PU Datasheet - Page 41

• Manufacturer Part Number: AT89LP6440-20PU
• Description: MCU 8051 64K FLASH ISP 40PDIP
• Manufacturer: Atmel
• Series: 89LPr

Specifications of AT89LP6440-20PU

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 38
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 8K x 8
• Ram Size: 4.25K x 8
• Voltage - Supply (vcc/vdd): 2.4 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 9-1.
Figure 9-2.
Table 9-2.
3706A–MICRO–9/09
Symbol
EA
EC
ET2
ES
ET1
EX1
ET0
EX0
IE = A8H
Bit Addressable
Bit
Clock Cycles
Clock Cycles
Instruction
Instruction
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
AT89LP6440 - Preliminary
15
EX1
2
LCALL
Reset Value = 0000 0000B
ET0
1
21
1st ISR Instr.
EX0
0
41