AT89C51ED2-3CSIM Atmel, AT89C51ED2-3CSIM Datasheet - Page 29

• Manufacturer Part Number: AT89C51ED2-3CSIM
• Description: IC 8051 MCU FLASH 64K 40DIP
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C51ED2-3CSIM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 60MHz
• Connectivity: SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 34
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Data Bus Width: 8 bit
• Data Ram Size: 64 KB
• Interface Type: SPI, UART
• Maximum Clock Frequency: 60 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 3 x 16 bit
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -
• Lead Free Status / Rohs Status: No

Figure 11-2. Power Fail Detect
4235K–8051–05/08
VPFDP
VPFDM
Vcc
Vcc
Reset
When the power is applied, the Power Monitor immediately asserts a reset. Once the internal
supply after the voltage regulator reach a safety level, the power monitor then looks at the XTAL
clock input. The internal reset will remain asserted until the Xtal1 levels are above and below
VIH and VIL. Further more. An internal counter will count 1024 clock periods before the reset is
de-asserted.
If the internal power supply falls below a safety level, a reset is immediately asserted.
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AT89C51RD2/ED2
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