AT89C51RB2-3CSUL Atmel, AT89C51RB2-3CSUL Datasheet - Page 98
![MCU 8051 16K FLASH 3V 44-PLCC](/photos/6/70/67043/453-44-plcc_sml.jpg)
AT89C51RB2-3CSUL
Manufacturer Part Number
AT89C51RB2-3CSUL
Description
MCU 8051 16K FLASH 3V 44-PLCC
Manufacturer
Atmel
Series
89Cr
Datasheet
1.AT89C51RB2-RLTIL.pdf
(127 pages)
Specifications of AT89C51RB2-3CSUL
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-PLCC
Processor Series
AT89x
Core
8051
Data Bus Width
8 bit
Data Ram Size
1280 B
Interface Type
UART, SPI
Maximum Clock Frequency
60 MHz
Number Of Programmable I/os
32
Number Of Timers
3
Operating Supply Voltage
2.7 V to 5.5 V
Mounting Style
Through Hole
3rd Party Development Tools
PK51, CA51, A51, ULINK2
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
Autobaud Performances
Command Data Stream
Protocol
98
Table 72. Autobaud Performances
AT89C51RB2/RC2
Frequency (MHz)
Baudrate (bit/s)
2400
4800
9600
19200
38400
57600
115200
Frequency (MHz)
Baudrate (bit/s)
2400
4800
9600
19200
38400
57600
115200
1.8432
OK
OK
OK
OK
10
OK
OK
OK
OK
-
-
-
-
-
-
The ISP feature allows a wide range of baud rates in the user application. It is also
adaptable to a wide range of oscillator frequencies. This is accomplished by measuring
the bit-time of a single bit in a received character. This information is then used to pro-
gram the baud rate in terms of timer counts based on the oscillator frequency. The ISP
f e a tu r e r e q u ir e s th a t a n in itia l c h a ra c te r (a n u p p e rc a s e U ) b e se n t t o t h e
AT89C51RB2/RC2 to establish the baud rate. Table 72 shows the autobaud capability.
All commands are sent using the same flow. Each frame sent by the host is echoed by
the bootloader.
11.0592
OK
OK
OK
OK
OK
OK
OK
OK
2
-
-
-
-
-
-
2.4576
OK
OK
OK
OK
OK
12
OK
OK
OK
OK
OK
-
-
-
-
14.318
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
3
-
-
3.6864
14.746
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
-
OK
OK
OK
16
OK
OK
OK
OK
OK
OK
4
-
-
-
-
-
OK
OK
OK
OK
20
OK
OK
OK
OK
OK
OK
5
-
-
-
-
OK
OK
OK
OK
OK
24
OK
OK
OK
OK
OK
OK
6
-
-
-
7.3728
26.6
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
-
OK
OK
OK
OK
8
4180E–8051–10/06