AT89LV51-12AC Atmel, AT89LV51-12AC Datasheet - Page 7

• Manufacturer Part Number: AT89LV51-12AC
• Description: IC MICRO CTRL 12MHZ 44TQFP
• Manufacturer: Atmel
• Series: 89LVr

Specifications of AT89LV51-12AC

• 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: 0°C ~ 70°C
• Package / Case: 44-TQFP, 44-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -
• Peripherals: -
• Other names: AT89LV5112AC

Programming Interface
Every code byte in the Flash array can be written and the
entire array can be erased by using the appropriate combi-
nation of control signals. The write operation cycle is self-
timed and once initiated, will automatically time itself to
completion.
Flash Programming Modes
Note:
Figure 3. Programming the Flash
Mode
Write Code Data
Read Code Data
Write Lock
Chip Erase
Read Signature Byte
PROGRAMMING
MODES ABLE
3-12 MHz
SEE FLASH
OOOOH/OFFFH
1. Chip Erase requires a 10-ms PROG pulse.
ADDR.
T
A0 - A7
A8 - A11
Bit - 1
Bit - 2
Bit - 3
P1
P2.0 - P2.3
P2.6
P2.7
P3.6
P3.7
XTAL2
XTAL1
GND
RST
H
H
H
H
H
H
H
AT89LV51
PSEN
RST
ALE
PSEN
V
EA
P0
CC
L
L
L
L
L
L
L
+5V
PGM
DATA
PROG
V /V
V
ALE/PROG
IH
IH
PP
H
H
All major programming vendors offer worldwide support for
the Atmel microcontroller series. Please contact your local
programming vendor for the appropriate software revision.
Figure 4. Verifying the Flash
(1)
EA/V
12V
12V
12V
12V
12V
H
H
PP
P2.6
H
H
H
H
L
L
L
P2.7
H
H
H
L
L
L
L
P3.6
CC
H
H
H
H
L
L
L
P3.7
H
H
H
L
L
L
L
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