AT89LP428-20PU Atmel, AT89LP428-20PU Datasheet - Page 32
AT89LP428-20PU
Manufacturer Part Number
AT89LP428-20PU
Description
MCU 8051 4K FLASH SPI 28PDIP
Manufacturer
Atmel
Series
89LPr
Datasheet
1.AT89LP428-20AU.pdf
(149 pages)
Specifications of AT89LP428-20PU
Core Processor
8051
Core Size
8-Bit
Speed
20MHz
Connectivity
SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
30
Program Memory Size
4KB (4K x 8)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
768 x 8
Voltage - Supply (vcc/vdd)
2.4 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
28-DIP (0.300", 7.62mm)
Processor Series
AT89x
Core
8051
3rd Party Development Tools
PK51, CA51, A51, ULINK2
Development Tools By Supplier
AT89ISP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Data Converters
-
Lead Free Status / Rohs Status
Details
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- Download datasheet (5Mb)
9.2
Table 9-2.
Table 9-3.
32
Symbol
EA
EC
ET2
ES
ET1
EX1
ET0
EX0
Symbol
IP0D
PC
PT2
PS
PT1
PX1
PT0
PX0
IE = A8H
Bit Addressable
Bit
IP = B8H
Bit Addressable
Bit
Interrupt Registers
AT89LP428/828
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
Function
Interrupt Priority 0 Disable. Set IP0D to 1 to disable all interrupts with priority level zero. Clear to 0 to enable all interrupts
with priority level zero when EA = 1.
Comparator Interrupt Priority Low
Timer 2 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 – Interrupt Enable Register
IP – Interrupt Priority Register
IP0D
EA
7
7
PC
EC
6
6
ET2
PT2
5
5
ES
PS
4
4
ET1
PT1
3
3
EX1
PX1
2
2
Reset Value = 0000 0000B
Reset Value = 0000 0000B
ET0
PT0
1
1
3654A–MICRO–8/09
EX0
PX0
0
0
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