ST92150CV1Q-Auto STMicroelectronics, ST92150CV1Q-Auto Datasheet - Page 54

• Manufacturer Part Number: ST92150CV1Q-Auto
• Description: 8-bit MCU for automotive
• Manufacturer: STMicroelectronics

Specifications of ST92150CV1Q-Auto

• Internal Memory: Single Voltage FLASH up to 256 Kbytes, RAM up to 8Kbytes, 1K byte E3 TM (Emulated EEPROM)
• Minimum Instruction Time: 83 ns (24 MHz int. clock)

ST92124xxx-Auto/150xxxxx-Auto/250xxxx-Auto
FUNCTIONAL DESCRIPTION (Cont’d)
3.2.3 Operation
The memory has a register interface mapped in
memory space (segment 22h). All operations are
enabled through the FCR (Flash Control Register),
ECR (
All operations on the Flash must be executed from
another memory (internal RAM,
memory).
Flash (including TestFlash) and
pendent, this means that one can be read while
the other is written. However simultaneous Flash
and
An interrupt can be generated at the end of a
Flash or an
multiplexed with an external interrupt EXTINTx
(device dependent) to generate an interrupt INTx.
The status of a write operation inside the Flash
and the
the FESR[1:0] registers.
Control and Status registers are mapped in mem-
ory (segment 22h), as shown in the following fig-
ure.
Figure 32. Control and Status Register Map.
In order to use the same data pointer register
(DPR) to point both to the
2203FFh) and to these control and status regis-
ters, the Flash and
mapped not only at page 0x89 (224000h-
224003h) but also on page 0x88 (221000h-
221003h).
54/430
9
224000h
224001h
224002h
224003h
E
3 TM
E
3 TM
E
3 TM
write operations are forbidden.
/
/
/
Control Register).
/
E
221000h
221001h
221002h
221003h
memories can be monitored through
3 TM
write operation: this interrupt is
Register Interface
E
3 TM
control registers are
FESR0
FESR1
ECR
FCR
E
3 TM
E
E
3 TM
3 TM
(220000h-
, external
are inde-
If the RESET pin is activated during a write opera-
tion, the write operation is interrupted. In this case
the user must repeat this last write operation fol-
lowing power on or reset. If the internal supply volt-
age drops below the V
quence is generated automatically by hardware.
3.2.4
The update of the
pages of 16 consecutive bytes. The Page Update
operation allows up to 16 bytes to be loaded into
the RAM buffer that replace the ones already con-
tained in the specified address.
Each time a Page Update operation is executed in
the
in the next free block relative to the specified page
(the RAM buffer is previously automatically filled
with old data for all the page addresses not select-
ed for updating). If all the 4 blocks of the specified
page in the current
content is copied to the complementary sector,
that becomes the new current one.
After that the specified page has been copied to
the next free block, one erase phase is executed
on the complementary sector, if the 4 erase phas-
es have not yet been executed. When the selected
page is copied to the complementary sector, the
remaining 63 pages are also copied to the first
block of the new sector; then the first erase phase
is executed on the previous full sector. All this is
executed in a hidden manner, and the End Page
Update Interrupt is generated only after the end of
the complete operation.
At Reset the two status pages are read in order to
detect which is the sector that is currently mapping
the
mapped. A system defined routine written in Test-
Flash is executed at reset, so that any previously
aborted write operation is restarted and complet-
ed.
E
E
3 TM
E
3 TM
3 TM
, the RAM buffer content is programmed
, and in which block each page is
Update Operation
E
E
3 TM
3 TM
IT-
content can be made by
sector are full, the page
threshold, a reset se-