ST10F276Z5 STMicroelectronics, ST10F276Z5 Datasheet - Page 53

• 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

Specifications of ST10F276Z5

• Single Voltage Supply: 5V ±10% (embedded regulator for 1.8 V core supply)

ST10F276Z5
5.2.6
Figure 8.
1. As long as the device is in BSL, the user’s software should not try to execute code from the internal IFlash,
Loading the start-up code
After the serial link initialization sequence (see following chapters), the BSL enters a loop to
receive 32 bytes (boot via UART) or 128 bytes (boot via CAN).
These bytes are stored sequentially into the device Dual-Port RAM from location 00’FA40h.
To execute the loaded code, the BSL then jumps to location 00’FA40h. The bootstrap
sequence running from the Test-Flash is now terminated; however, the microcontroller
remains in BSL mode.
Most probably, the initially loaded routine, being the first level user code, will load additional
code and data. This first level user code may use the pre-initialized interface (UART or CAN)
to receive data and a second level of code, and store it in arbitrary user-defined locations.
This second level of code may be
●
●
●
In all cases, the device still runs in BSL mode, that is, with the watchdog timer disabled and
limited access to the internal IFLASH area.
BSL mode active
EA pin
Code fetch from
internal FLASH area
Data fetch from
internal FLASH area
as the fetches are redirected to the Test-Flash.
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
Memory configuration after reset
Yes (P0L.4 = ‘0’)
High
Test-FLASH access
User IFLASH access
16 Mbytes
RAM
int.
0
1
access to
int. FLASH
enabled
access to
external
bus
disabled
Yes (P0L.4 = ‘0’)
Low
Test-FLASH access
User IFLASH access
16 Mbytes
RAM
int.
0
1
access to
int. FLASH
enabled
access to
external
bus
enabled
No (P0L.4 = ‘1’)
According to application
User IFLASH access
User IFLASH access
16 Mbytes
RAM
int.
Bootstrap loader
0
1
Depends on
reset config.
(EA, P0)
Depends on
reset config.
53/239