T89C51RC2-RLTIM Atmel, T89C51RC2-RLTIM Datasheet
T89C51RC2-RLTIM
Manufacturer Part Number
T89C51RC2-RLTIM
Description
IC MICRO CTRL 32K FLASH 44VQFP
Manufacturer
Atmel
Series
89Cr
Specifications of T89C51RC2-RLTIM
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
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
1.2K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
44-TQFP, 44-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Data Converters
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Active Errata List
•
•
•
•
Errata History
Errata Descriptions
1. During UART Reception, Clearing REN May Generate Unexpected IT
2. Timer 2 – Baud Rate Generator
3. Stretch MOVX Does Not Work
4. Timer0/1
Lot Number
All
During UART Reception, Clearing REN May Generate Unexpected IT
Timer 2 – Baud Rate Generator – Long Start Time
Stretch MOVX Does Not Work
Timer0/1
During UART reception, if the REN bit is cleared between start bit detection and
the end of reception, the UART will not discard the data (RI is set).
Workaround
Test REN at the beginning of Interrupt routine just after CLR RI, and run the Inter-
rupt routine code only if REN is set.
When Timer 2 is used as a baud rate generator, TH2 is not loaded with RCAP2H
at the beginning, then UART is not operational before 10,000 machine cycles.
Workaround
Add the initialization of TH2 and TL2 in the initialization of Timer 2.
When setting M0 bit in AUXR SFR (08Eh), the RD or WR pulse on a MOVX
instruction on external memory is not 30 XTAL length but always standard 6 XTAL
length. Thus slow external peripherals mapping in the XDATA space could not
work properly.
Workaround
None.
When Timer0 is in X1 mode and Timer1 in X2 mode and vice versa, extra inter-
rupt may randomly occur for Timer0 or Timer1.
Workaround
Use the same mode for the two timers.
–
Extra Interrupt
–
Extra Interrupt
–
Long Start Time
.
Errata List
1, 2, 3, 4
80C51 MCUs
AT89C51RB2
AT89C51RC2
Errata Sheet
Rev. 4181C–8051–06/04
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T89C51RC2-RLTIM Summary of contents
Page 1
... When Timer0 mode and Timer1 in X2 mode and vice versa, extra inter- rupt may randomly occur for Timer0 or Timer1. Workaround Use the same mode for the two timers. Errata List Long Start Time – . 80C51 MCUs AT89C51RB2 AT89C51RC2 Errata Sheet Rev. 4181C–8051–06/04 ...
Page 2
Active UART Bootloader Errata List • API program Data Byte - Incorrect Return Value • API program Data Page - Incorrect Return Value UART Bootloader Errata History Version Number 0.1 (1.0.1 displayed by FLIP) UART Bootloader Errata Description 1. API ...
Page 3
... No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use as critical components in life support devices or systems. ...