AT89C51RB2-SLRUM Atmel, AT89C51RB2-SLRUM Datasheet - Page 56
![MCU 8051 16K FLASH 5V 44-PLCC](/photos/6/70/67043/453-44-plcc_sml.jpg)
AT89C51RB2-SLRUM
Manufacturer Part Number
AT89C51RB2-SLRUM
Description
MCU 8051 16K FLASH 5V 44-PLCC
Manufacturer
Atmel
Series
89Cr
Datasheet
1.AT89C51RB2-RLTIL.pdf
(127 pages)
Specifications of AT89C51RB2-SLRUM
Core Processor
8051
Core Size
8-Bit
Speed
60MHz
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 ~ 5.5 V
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
44-PLCC
For Use With
AT89STK-11 - KIT STARTER FOR AT89C51RX2
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT89C51RB2-SLRUM
Manufacturer:
Atmel
Quantity:
500
Registers
56
AT89C51RB2/RC2
A low-priority interrupt can be interrupted by a high-priority interrupt, but not by another
low-priority interrupt. A high-priority interrupt can’t be interrupted by any other interrupt
source.
Table 43. Priority Level Bit Values
If two interrupt requests of different priority levels are received simultaneously, the
request of higher-priority level is serviced. If interrupt requests of the same priority level
are received simultaneously, an internal polling sequence determines which request is
serviced. Thus within each priority level there is a second priority structure determined
by the polling sequence.
IPH. x
0
0
1
1
IPL. x
0
1
0
1
Interrupt Level Priority
3 (Highest)
0 (Lowest)
1
2
4180E–8051–10/06