T89C51CC01CA-RLTIM Atmel, T89C51CC01CA-RLTIM Datasheet - Page 9
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T89C51CC01CA-RLTIM
Manufacturer Part Number
T89C51CC01CA-RLTIM
Description
IC 8051 MCU FLASH 32K 44VQFP
Manufacturer
Atmel
Series
AT89C CANr
Datasheets
1.T89C51CC01CA-7CTIM.pdf
(167 pages)
2.T89C51CC01CA-7CTIM.pdf
(12 pages)
3.T89C51CC01CA-7CTIM.pdf
(32 pages)
4.T89C51CC01CA-7CTIM.pdf
(29 pages)
Specifications of T89C51CC01CA-RLTIM
Core Processor
8051
Core Size
8-Bit
Speed
40MHz
Connectivity
CAN, UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
32
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Eeprom Size
2K x 8
Ram Size
1.25K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
44-TQFP, 44-VQFP
For Use With
AT89STK-06 - KIT DEMOBOARD 8051 MCU W/CAN
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
T89C51CC01CARLTIM
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Protocol
Overview
Communication
Initialization
Autobaud
Performances
Table 2. Autobaud Performances
4211C–CAN–03/08
Frequency
(MHz)
Baudrate
(Bauds)
2400
4800
9600
19200
38400
57600
115200
Frequency
(MHz)
Baudrate
(Bauds)
2400
4800
9600
19200
1.8432
OK
OK
OK
OK
OK
OK
OK
OK
8
-
-
-
An initialization step must be performed after each Reset. After microcontroller reset, the boot-
loader waits for an autobaud sequence (see Section “Autobaud Performances”).
When the communication is initialized the protocol depends on the record type issued by the
host.
The host initiates the communication by sending a ’U’ character to help the bootloader to com-
pute the baudrate (autobaud).
Figure 2. Initialization
The bootloader supports a wide range of baud rates. It is also adaptable to a wide range of oscil-
lator frequencies. This is accomplished by measuring the bit-time of a single bit in a received
character. This information is then used to program the baud rate in terms of timer counts based
on the oscillator frequency. Table 2 shows the autobaud capabilities.
OK
10
OK
OK
OK
OK
2
-
-
-
-
-
-
Communication Opened
Init Communication
Else
If (not received "U")
11.0592
2.4576
Host
OK
OK
OK
OK
OK
OK
OK
OK
OK
-
-
12
OK
OK
OK
OK
OK
OK
OK
OK
3
-
-
T89C51CC01 UART Bootloader
3.6864
14.746
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
-
"U"
"U"
OK
OK
OK
16
OK
OK
OK
OK
4
-
-
-
-
20
OK
OK
OK
OK
OK
OK
OK
OK
5
-
-
-
Sends Back ‘U’ Character
Performs Autobaud
Bootloader
OK
OK
OK
OK
OK
24
OK
OK
OK
OK
6
-
-
7.3728
26.6
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
9