T89C51CC02UA-RATIM Atmel, T89C51CC02UA-RATIM Datasheet - Page 6

• Manufacturer Part Number: T89C51CC02UA-RATIM
• Description: IC 8051 MCU FLASH 16K 32VQFP
• Manufacturer: Atmel
• Series: AT89C CANr

Specifications of T89C51CC02UA-RATIM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: CAN, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 20
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 512 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: 32-TQFP, 32-VQFP
• For Use With: AT89STK-06 - KIT DEMOBOARD 8051 MCU W/CAN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: T89C51CC02UARATIM

In-System
Programming
(ISP)
Boot Process
Hardware Condition
6
T89C51CC02 CAN Bootloader
The ISP allows the user to program or reprogram a microcontroller’s on-chip Flash memory
through the CAN network without removing it from the system and without the need of a pre-pro-
grammed application.
This section describes how to start the CAN bootloader and all higher level protocols over the
CAN.
The bootloader can be activated in two ways:
•
•
The Hardware Condition forces the bootloader execution from reset.
The default factory Hardware Condition is assigned to port P1.
•
In order to offer the best flexibility, the user can define its own Hardware Condition on one of the
following Ports:
•
•
•
The Hardware Condition configuration are stored in three bytes called P1_CF, P3_CF, P4_CF.
These bytes can be modified by the user through a set of API or through an ISP command.
There is a priority between P1_CF, P3_CF and P4_CF (see Figure 3 on page 7).
Note:
Hardware condition
Regular boot process
P1 must be equal to FEh
Port1
Port3
Port4 (only bit0 and bit1)
The BLJB must be at 0 (programmed) to be able to restart the bootloader.
If the BLJB is equal to 1 (unprogrammed) only the hardware parallel programmer can change this
bit (see T89C51CC02 datasheet for more details).
4208D–CAN–03/08