ST10F276Z5 STMicroelectronics, ST10F276Z5 Datasheet - Page 61
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ST10F276Z5
Manufacturer Part Number
ST10F276Z5
Description
16-BIT MICROCONTROLLER WITH MAC UNIT, UP TO 832 KBYTES FLASH MEMORY AND UP TO 68 KBYTES RAM
Manufacturer
STMicroelectronics
Datasheet
1.ST10F276Z5.pdf
(239 pages)
Specifications of ST10F276Z5
Single Voltage Supply
5V ±10% (embedded regulator for 1.8 V core supply)
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ST10F276Z5
5.4.5
mode. Most probably the initially loaded routine will load additional code or data, as an
average application is likely to require substantially more than 64 instructions. This second
receive loop may directly use the pre-initialized CAN interface to receive data and store it in
arbitrary user-defined locations.
This second level of loaded code may be
●
●
●
This process may go through several iterations or may directly execute the final application.
In all cases the ST10F276Z5 still runs in BSL mode, that is, with the watchdog timer
disabled and limited access to the internal Flash area. All code fetches from the internal
Flash area (01’0000
operations will access the internal Flash of the ST10F276Z5.
Choosing the baud rate for the BSL via CAN
The Bootstrap via CAN acts the same way as in the UART bootstrap mode. When the
ST10F276Z5 is started in BSL mode, it polls the RxD0 and CAN1_RxD lines. When polling
a low level on one of these lines, a timer is launched that is stopped when the line returns to
high level.
For CAN communication, the algorithm is made to receive a zero frame, that is, the standard
identifier is 0x0, DLC is 0. This frame produces the following levels on the network: 5D, 1R,
5D, 1R, 5D, 1R, 5D, 1R, 5D, 1R, 4D, 1R, 1D, 11R. The algorithm lets the timer run until the
detection of the 5
bit times: This minimizes the error introduced by the polling
Figure 12. Bit rate measurement over a predefined zero-frame
the final application code
another, more sophisticated, loader routine that adds a transmission protocol to
enhance the integrity of the loaded code or data
a code sequence to change the system configuration and enable the bus interface to
store the received data into external memory
Start
th
recessive bit. This way the bit timing is calculated over the duration of 29
H
Stuff bit
...08’FFFF
H
) are redirected to the special Test-Flash. Data read
Stuff bit
Measured time
Stuff bit
.
Stuff bit
Bootstrap loader
........
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