AT89C51IC2-SLRIL Atmel, AT89C51IC2-SLRIL Datasheet - Page 13
![IC MCU FLASH 8051 32K 3V 44-PLCC](/photos/6/70/67043/453-44-plcc_sml.jpg)
AT89C51IC2-SLRIL
Manufacturer Part Number
AT89C51IC2-SLRIL
Description
IC MCU FLASH 8051 32K 3V 44-PLCC
Manufacturer
Atmel
Series
89Cr
Datasheet
1.AT89C51IC2-SLRIM.pdf
(147 pages)
Specifications of AT89C51IC2-SLRIL
Core Processor
8051
Core Size
8-Bit
Speed
40MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
34
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
1.25K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
44-PLCC
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Data Converters
-
Other names
AT89C51IC2SLRILTR
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Table 13. Pin Description for 40/44 Pin Packages (Continued)
4301D–8051–02/08
RST
ALE/PROG
PSEN
EA
Mnemonic
PLCC44
10
33
32
35
Pin Number
VQFP44 1.4
27
26
29
4
Type
O (I)
I/O
O
I
Name and Function
SDA is the bidirectional 2-wire data line
Reset: A high on this pin for two machine cycles while the oscillator is running, resets
the device. An internal diffused resistor to V
external capacitor to V
system reset.
Address Latch Enable/Program Pulse: Output pulse for latching the low byte of the
address during an access to external memory. In normal operation, ALE is emitted at a
constant rate of 1/6 (1/3 in X2 mode) the oscillator frequency, and can be used for
external timing or clocking. Note that one ALE pulse is skipped during each access to
external data memory. This pin is also the program pulse input (PROG) during Flash
programming. ALE can be disabled by setting SFR’s AUXR.0 bit. With this bit set, ALE
will be inactive during internal fetches.
Program Strobe ENable: The read strobe to external program memory. When execut-
ing code from the external program memory, PSEN is activated twice each machine
cycle, except that two PSEN activations are skipped during each access to external
data memory. PSEN is not activated during fetches from internal program memory.
External Access Enable: EA must be externally held low to enable the device to fetch
code from external program memory locations 0000H to FFFFH (RD). If security level 1
is programmed, EA will be internally latched on Reset.
CC
. This pin is an output when the hardware watchdog forces a
SS
permits a power-on reset using only an
13
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