AT89LV51-12PI Atmel, AT89LV51-12PI Datasheet - Page 14

• Manufacturer Part Number: AT89LV51-12PI
• Description: IC MICRO CTRL 12MHZ 40DIP
• Manufacturer: Atmel
• Series: 89LVr

Specifications of AT89LV51-12PI

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 12MHz
• Connectivity: UART/USART
• Number Of I /o: 32
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2.7 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
• Eeprom Size: -
• Data Converters: -
• Peripherals: -
• Other names: AT89LV5112PI

Serial Port Timing: Shift Register Mode Test Conditions
(V
Shift Register Mode Timing Waveforms
AC Testing Input/Output Waveforms
Note:
4-58
Symbol
t
t
t
t
t
XLXL
QVXH
XHQX
XHDX
XHDV
CC
V
CC
= 2.7V to 6V; Load Capacitance = 80 pF)
INSTRUCTION
- 0.5V
0.45V
WRITE TO SBUF
OUTPUT DATA
1.
INPUT DATA
CLEAR RI
AC inputs during testing are driven at 2.4V for a
logic “1” and 0.45V for a logic “0”. Timing measure-
ments are made at 2.0V for a logic “1” and 0.8V for a
logic “0”.
CLOCK
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
ALE
0.2 V
0.2 V
TEST POINTS
CC
0
CC
t
QVXH
+ 0.9V
- 0.1V
Not
t
1
XHDV
0
VALID
2
t
XLXL
t
1
XHQX
VALID
(1)
Min
700
1.0
50
0
3
t
12 MHz Osc
2
XHDX
VALID
Float Waveforms
Note:
V
LOAD
4
1.
3
VALID
Max
700
V
V
For timing purposes, a port pin is no longer floating
when a 100 mV change from load voltage occurs. A
port pin begins to float when a 100 mV change from
the loaded V
LOAD
LOAD
5
+ 0.1V
- 0.1V
4
VALID
10t
2t
OH
12t
CLCL
CLCL
Timing Reference
6
Min
Variable Oscillator
/V
(1)
CLCL
0
5
OL
-117
VALID
-133
Points
level occurs.
7
10t
6
VALID
CLCL
Max
SET TI
SET RI
V
V
OL
8
OL
-133
- 0.1V
+ 0.1V
7
VALID
Units
ns
ns
ns
ns
s