AT89C51RB2-RLTIL Atmel, AT89C51RB2-RLTIL Datasheet - Page 12
AT89C51RB2-RLTIL
Manufacturer Part Number
AT89C51RB2-RLTIL
Description
IC 8051 MCU FLASH 16K 44VQFP
Manufacturer
Atmel
Series
89Cr
Datasheet
1.AT89C51RB2-RLTIL.pdf
(127 pages)
Specifications of AT89C51RB2-RLTIL
Core Processor
8051
Core Size
8-Bit
Speed
40MHz
Connectivity
SPI, UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
32
Program Memory Size
16KB (16K 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-TQFP, 44-VQFP
For Use With
AT89STK-11 - KIT STARTER FOR AT89C51RX2
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Data Converters
-
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Table 12. Pin Description for 40 - 44 Pin Packages (Continued)
12
Mnemonic
PSEN
EA
AT89C51RB2/RC2
DIL
29
31
Pin Number
LCC
32
35
VQFP44 1.4
26
29
Type
O
I
Name and Function
Program Strobe Enable: The read strobe to external program memory. When
executing 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.
4180E–8051–10/06
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