AT87F51-24JI Atmel, AT87F51-24JI Datasheet - Page 6

• Manufacturer Part Number: AT87F51-24JI
• Description: IC MICRO CTRL 24MHZ 44PLCC
• Manufacturer: Atmel
• Series: 87Fr

Specifications of AT87F51-24JI

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 24MHz
• Connectivity: UART/USART
• Number Of I /o: 32
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: OTP Quick FLASH
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -
• Peripherals: -

Programming Interface
Every code byte in the QuickFlash array can be pro-
grammed by using the appropriate combination of control
signals. The write operation cycle is self-timed and once
initiated, will automatically time itself to completion.
QuickFlash Programming Modes
Figure 3. Programming the QuickFlash Memory
6
Mode
Write Code Data
Read Code Data
Write Lock
Read Signature Byte
PROGRAMMING
3-24 MHz
MODES ABLE
SEE FLASH
OOOOH/OFFFH
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
AT87F51
RST
H
H
H
H
H
H
PSEN
Not
RST
ALE
V
EA
P0
CC
PSEN
L
L
L
L
L
L
+5V
PGM
DATA
PROG
V /V
V
IH
IH
PP
ALE/PROG
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 QuickFlash Memory
H
H
3-24 MHz
PROGRAMMING
MODES ABLE
SEE FLASH
OOOOH/0FFFH
ADDR.
T
EA/V
12V
12V
12V
12V
A0 - A7
A8 - A11
H
H
PP
P2.6
P1
P2.0 - P2.3
P2.6
P2.7
P3.6
P3.7
XTAL2
XTAL1
GND
H
H
H
L
L
L
AT87F51
P2.7
H
H
H
L
L
L
PSEN
RST
ALE
V
EA
P0
CC
P3.6
H
H
H
H
L
L
+5V
PGM DATA
(USE 10K
PULLUPS)
V
P3.7
V
IH
IH
H
H
H
L
L
L