AT89S52-24JU Atmel, AT89S52-24JU Datasheet - Page 18
AT89S52-24JU
Manufacturer Part Number
AT89S52-24JU
Description
IC MCU 8K FLASH 24MHZ 44-PLCC
Manufacturer
Atmel
Series
89Sr
Datasheet
1.AT89S52-24AU.pdf
(38 pages)
Specifications of AT89S52-24JU
Core Processor
8051
Core Size
8-Bit
Speed
24MHz
Connectivity
UART/USART
Peripherals
WDT
Number Of I /o
32
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
4 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
44-PLCC
Package
44PLCC
Device Core
8051
Family Name
89S
Maximum Speed
24 MHz
Operating Supply Voltage
5 V
Data Bus Width
8 Bit
Number Of Programmable I/os
32
Interface Type
UART
Number Of Timers
3
Processor Series
AT89x
Core
8051
Data Ram Size
256 B
Maximum Clock Frequency
33 MHz
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
PK51, CA51, A51, ULINK2
Development Tools By Supplier
AT89ISP
Minimum Operating Temperature
- 40 C
Eeprom Memory
0 Bytes
Input Output
32
Interface
UART
Memory Type
Flash
Number Of Bits
8
Package Type
44-pin PLCC
Programmable Memory
8K Bytes
Timers
3-16-bit
Voltage, Range
4-5.5 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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Manufacturer
Quantity
Price
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Table 13-1.
Figure 13-1. Interrupt Sources
18
Symbol
EA
–
ET2
ES
ET1
EX1
ET0
EX0
User software should never write 1s to reserved bits, because they may be used in future AT89 products.
(MSB)
Enable Bit = 1 enables the interrupt.
Enable Bit = 0 disables the interrupt.
EA
AT89S52
Interrupt Enable (IE) Register
Position
IE.7
IE.6
IE.5
IE.4
IE.3
IE.2
IE.1
IE.0
–
ET2
EXF2
INT0
INT1
TF0
TF1
TF2
RI
TI
Function
Disables all interrupts. If EA = 0, no interrupt is acknowledged. If EA = 1, each
interrupt source is individually enabled or disabled by setting or clearing its enable bit.
Reserved.
Timer 2 interrupt enable bit.
Serial Port interrupt enable bit.
Timer 1 interrupt enable bit.
External interrupt 1 enable bit.
Timer 0 interrupt enable bit.
External interrupt 0 enable bit.
0
1
0
1
ES
(LSB)
ET1
IE0
IE1
EX1
ET0
EX0
1919D–MICRO–6/08