AT89LV55-12AI Atmel, AT89LV55-12AI Datasheet - Page 26

• Manufacturer Part Number: AT89LV55-12AI
• Description: IC 8051 MCU FLASH 20K 44TQFP
• Manufacturer: Atmel
• Series: 89LVr

Specifications of AT89LV55-12AI

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 12MHz
• Connectivity: UART/USART
• Number Of I /o: 32
• Program Memory Size: 20KB (20K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: UART
• Maximum Clock Frequency: 12 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 3 bit
• Operating Supply Voltage: 2.7 V to 6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -
• Peripherals: -
• Lead Free Status / Rohs Status: No

30. Shift Register Mode Timing Waveforms
31. AC Testing Input/Output Waveforms
Note:
32. Float Waveforms
Note:
26
1. AC Inputs during testing are driven at 2.4V for a logic “1” and 0.45V for a logic “0”. Timing measurements are made at 2.0V
1. For timing purposes, a port pin is no longer floating when a 100 mV change from load voltage occurs. A port pin begins to
AT89LV55
for a logic “1” and 0.8V for a logic “0”.
float when a 100 mV change from the loaded V
(1)
OH
/V
OL
(1)
level occurs.
0811E–MICRO–9/08