AT89C51RB2-RLTUM Atmel, AT89C51RB2-RLTUM Datasheet - Page 98

• Manufacturer Part Number: AT89C51RB2-RLTUM
• Description: IC 8051 MCU FLASH 16K 44VQFP
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C51RB2-RLTUM

• 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-TQFP, 44-VQFP
• Cpu Family: 89C
• Device Core: 8051
• Device Core Size: 8b
• Frequency (max): 60MHz
• Interface Type: SPI/UART
• Total Internal Ram Size: 1.25KB
• # I/os (max): 32
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 44
• Package Type: VQFP
• Package: 44VQFP
• Family Name: 89C
• Maximum Speed: 60 MHz
• Operating Supply Voltage: 3.3|5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 32
• Number Of Timers: 3
• Processor Series: AT89x
• Core: 8051
• Data Ram Size: 1.25 KB
• Maximum Clock Frequency: 60 MHz
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Minimum Operating Temperature: - 40 C
• For Use With: AT89OCD-01 - USB EMULATOR FOR AT8XC51 MCUAT89STK-11 - KIT STARTER FOR AT89C51RX2
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Compliant

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