AT89S8253-24AC Atmel, AT89S8253-24AC Datasheet - Page 32

• Manufacturer Part Number: AT89S8253-24AC
• Description: IC 8051 MCU FLASH 12K 44TQFP
• Manufacturer: Atmel
• Series: 89Sr

Specifications of AT89S8253-24AC

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 24MHz
• Connectivity: SPI, UART/USART
• Peripherals: POR, WDT
• Number Of I /o: 32
• Program Memory Size: 12KB (12K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 44-TQFP, 44-VQFP
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: SPI, UART
• Maximum Clock Frequency: 24 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 3 bit
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: 0 C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -
• Lead Free Status / Rohs Status: No

Table 15-3.
Figure 15-1. Interrupt Sources
32
Symbol
PT2H
PSH
PT1H
PX1H
PT0H
PX0H
IPH = B7H
Not Bit Addressable
Bit
AT89S8253
Function
Timer 2 Interrupt Priority High
Serial Port Interrupt Priority High
Timer 1 Interrupt Priority High
External Interrupt 1 Priority High
Timer 0 Interrupt Priority High
External Interrupt 0 Priority High
IPH
–
7
– Interrupt Priority High Register
.
–
6
PT2H
5
PSH
4
PT1H
3
PX1H
2
Reset Value = XX00 0000B
PT0H
1
PX0H
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0