ST10F276Z5 STMicroelectronics, ST10F276Z5 Datasheet - Page 52

• 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)

Bootstrap loader
5.2.5
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Figure 7.
Memory configuration in bootstrap loader mode
The configuration (that is, the accessibility) of the device memory areas after reset in
Bootstrap Loader mode differs from the standard case. Pin EA is evaluated when BSL mode
is selected to enable or to not enable the external bus:
●
●
Moreover, while in BSL mode, accesses to the internal IFLASH area are partially redirected:
●
●
●
●
●
Example
In default configuration, to program address 0, the user must put the value 01'0000h in the
FARL and FARH registers but to verify the content of the address 0 a read to 00'0000h must
be performed.
If EA = 1, the external bus is disabled (BUSACT0 = 0 in BUSCON0 register);
If EA = 0, the external bus is enabled (BUSACT0 = 1 in BUSCON0 register).
All code accesses are made from the special Test-Flash seen in the range 00’0000h to
00’01FFFh;
User IFLASH is only available for read and write accesses (Test-Flash cannot be read
or written);
Write accesses must be made with addresses starting in segment 1 from 01'0000h,
regardless of the value of ROMS1 bit in SYSCON register;
Read accesses are made in segment 0 or in segment 1 depending on the ROMS1
value;
In BSL mode, by default, ROMS1 = 0, so the first 32 Kbytes of IFlash are mapped in
segment 0.
P0L.4
Hardware provisions to activate the BSL
R
8kΩ max.
Circuit 1
P0L.4
P0L.4
External
signal
Normal boot
BSL
R
8kΩ max.
Circuit 2
P0L.4
ST10F276Z5