ST10F269-DP STMicroelectronics, ST10F269-DP Datasheet - Page 32

• Manufacturer Part Number: ST10F269-DP
• Description: MCU 16BIT 256K FLASH 144PQFP
• Manufacturer: STMicroelectronics
• Series: ST10r

Specifications of ST10F269-DP

• Core Processor: ST10
• Core Size: 16-Bit
• Speed: 40MHz
• Connectivity: CAN, EBI/EMI, SSC, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 111
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 12K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 144-BFQFP
• Processor Series: ST10F26x
• Core: ST10
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: No

ST10F269
Figure 7 : Memory Configuration after Reset
5.6.3 - Loading the Startup Code
After sending the identification Byte the BSL
enters a loop to receive 32 Bytes via ASC0. These
Byte are stored sequentially into locations
00’FA40h through 00’FA5Fh of the internal RAM.
So up to 16 instructions may be placed into the
RAM area. To execute the loaded code the BSL
then jumps to location 00’FA40h, which is the first
loaded instruction.
The
terminated, the ST10F269 remains in BSL mode,
however. Most probably the initially loaded routine
will load additional code or data, as an average
application is likely to require substantially more
than 16 instructions. This second receive loop
may directly use the pre-initialized interface ASC0
to receive
user-defined locations.
This second level of loaded code may be the final
application code. It may also be another, more
sophisticated,
transmission protocol to enhance the integrity of
the loaded code or data. It may also contain a
code
configuration and enable the bus interface to store
the received data into external memory.
32/160
BSL mode active
EA pin
Code fetch from internal
Flash area
Data fetch from internal
Flash area
bootstrap
sequence
data
loader
loading
and store it to arbitrary
to
routine
Segment
change
Flash
Test
255
2
1
0
sequence
User Flash access
Test-Flash access
Yes (P0L.4=’0’)
16M Bytes
IRAM
Flash
User
that
High
the
Access to:
enabled
internal
adds
is
disabled
Flash
external
system
now
bus
a
Segment
Flash
Test
255
2
1
0
This process may go through several iterations or
may directly execute the final application. In all
cases the ST10F269 will still run in BSL mode,
that means with the watchdog timer disabled and
limited access to the internal Flash area.
All code fetches from the internal Flash area
(00’0000h...00’7FFFh or 01’0000h...01’7FFFh, if
mapped to segment 1) are redirected to the
special Boot-ROM. Data fetches access will
access the internal Boot-ROM of the ST10F269, if
any is available, but will return undefined data on
ROMless devices.
5.6.4 - Exiting Bootstrap Loader Mode
In order to execute a program in normal mode, the
BSL mode must be terminated first. The
ST10F269 exits BSL mode upon a software reset
(ignores the level on P0L.4) or a hardware reset
(P0L.4 must be high). After a reset the ST10F269
will start executing from location 00’0000h of the
internal Flash or the external memory, as
programmed via pin EA.
User Flash access
Test-Flash access
Yes (P0L.4=’0’)
IRAM
Flash
16M Bytes
User
Low
Access to:
enabled
internal
Flash
external
enabled
bus
Segment
255
2
1
0
Access to application
User Flash access
User Flash access
IRAM
Flash
User
No (P0L.4=’1’)
16M Bytes
depends on
depends on
Access:
reset config
reset config
EA, Port0
EA, Port0