AT89LV55-12AI Atmel, AT89LV55-12AI Datasheet - Page 25

• 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

28. External Clock Drive
29. Serial Port Timing: Shift Register Mode Test Conditions
The values in this table are valid for V
0811E–MICRO–9/08
Symbol
1/t
t
t
t
t
t
Symbol
t
t
t
t
t
CLCL
CHCX
CLCX
CLCH
CHCL
XLXL
QVXH
XHQX
XHDX
XHDV
CLCL
Parameter
Serial Port Clock Cycle Time
Output Data Setup to Clock Rising
Edge
Output Data Hold After Clock
Rising Edge
Input Data Hold After Clock Rising
Edge
Clock Rising Edge to Input Data
Valid
Parameter
Oscillator Frequency
Clock Period
High Time
Low Time
Rise Time
Fall Time
CC
= 5.0V ± 20% and Load Capacitance = 80 pF.
Min
700
1.0
50
0
12 MHz Osc
Max
700
83.3
Min
20
20
0
10t
2t
CLCL
12t
CLCL
Min
Variable Oscillator
0
CLCL
- 117
- 133
Max
12
20
20
10t
CLCL
Max
AT89LV55
- 133
Units
MHz
ns
ns
ns
ns
ns
Units
ns
ns
ns
ns
ns
25