st10f273m STMicroelectronics, st10f273m Datasheet - Page 21

• Manufacturer Part Number: st10f273m
• Description: 16-bit Mcu With 512 Kbyte Flash Memory And 36 Kbyte Ram
• Manufacturer: STMicroelectronics

ST10F273M
4
Note:
Note:
Memory organization
The memory space of the ST10F273M is configured in a unified memory architecture. Code
memory, data memory, registers and I/O ports are organized within the same linear address
space of 16 Mbytes. The entire memory space can be accessed Bytewise or Wordwise.
Particular portions of the on-chip memory have additionally been made directly bit
addressable.
IFlash: 512 Kbytes of on-chip Flash memory implemented as a unique Bank (Bank0).
Bank0 is divided in 12 blocks (B0F0...B0F11).
Read-while-write operations are not allowed: Write commands must be executed from a non
IFlash memory area (on-chip RAM or external memory).
When Bootstrap mode is selected, the Test-Flash Block B0TF (4 Kbytes) appears at
address 00’0000h: Refer to the device User Manual for more details on the memory
mapping in Bootstrap mode. The summary of address range for IFlash is the following:
Table 2.
A single Flash bank is implemented on the ST10F273M compared to the ST10F273E. The
last two sectors (B0F10 and B0F11) can be seen as the Bank1 of the ST10F273E in order
to maintain the compatibility with the existing Flash programming drivers. For this, the
control and status bit of the blocks B0F10 and B0F11 have been duplicated to be usable as
blocks B1F0 and B1F1 of the ST10F273E.
XFLASH / Flash Control Registers: Address range 0E’0000h-0E’FFFFh is reserved for
the Flash Control Register and other internal service memory space used by the Flash
Program/Erase Controller. XFLASHEN bit in XPERCON register must be set to access the
Flash Control Register. Note that when Flash Control Registers are not accessible, no
program/erase operations are possible. The Flash Control Registers are accessed in 16-bit
demultiplexed bus-mode without read/write delay. Byte and word accesses are allowed.
B1F0 / B0F10
B1F1 / B0F11
Blocks
B0TF
Summary of IFlash address range
B0F0
B0F1
B0F2
B0F3
B0F4
B0F5
B0F6
B0F7
B0F8
B0F9
(1)
(1)
01’8000h - 01’FFFFh
02’0000h - 02’FFFFh
03’0000h - 03’FFFFh
04’0000h - 04’FFFFh
05’0000h - 05’FFFFh
06’0000h - 06’FFFFh
07’0000h - 07’FFFFh
08’0000h - 08’FFFFh
00’0000h - 00’1FFFh
00’2000h - 00’3FFFh
00’4000h - 00’5FFFh
00’6000h - 00’7FFFh
User mode
Not visible
Memory organization
Size (bytes)
32 K
64 K
64 K
64 K
64 K
64 K
64 K
64 K
4 K
8 K
8 K
8 K
8 K
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