AT89S8252-24PI Atmel, AT89S8252-24PI Datasheet - Page 20

• Manufacturer Part Number: AT89S8252-24PI
• Description: MCU W/SPI 8KB FLSH 2K EEP 40-DIP
• Manufacturer: Atmel
• Series: 89Sr

Specifications of AT89S8252-24PI

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 24MHz
• Connectivity: SPI, UART/USART
• Peripherals: POR, WDT
• Number Of I /o: 32
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -
• Other names: AT89S825224PI

Table 10. Interrupt Enable (IE) Register
Figure 10. Interrupt Sources
20
(MSB)(LSB)
User software should never write 1s to unimplemented bits, because they may be used in future AT89 products.
Symbol
ET2
ET1
EX1
ET0
EX0
EA
ES
Enable Bit = 1 enables the interrupt.
Enable Bit = 0 disables the interrupt.
–
AT89S8252
EA
–
Position
IE.7
IE.6
IE.5
IE.4
IE.3
IE.2
IE.1
IE.0
ET2
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.
SPI and UART interrupt enable bit.
Timer 1 interrupt enable bit.
External interrupt 1 enable bit.
Timer 0 interrupt enable bit.
External interrupt 0 enable bit.
ES
ET1
EX1
ET0
EX0
0401G–MICRO–3/06