Datasheet

ST10F269 5 - INTERNAL FLASH MEMORY
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5 - INTERNAL FLASH MEMORY
5.1 - Overview
– 128K or 256K Byte on-chip Flash memory
– Two possibilities of Flash mapping into the CPU
address space
– Flash memory can be used for code and data
storage
– 32-bit, zero waitstate read access (50ns cycle
time at f
CPU
= 40MHz on PQFP144 devices and
62.5ns cycle time at f
CPU
= 32MHz on TQFP144
devices)
– Erase-Program Controller (EPC) similar to
M29F400B STM’s stand-alone Flash memory
• Word-by-Word Programmable (16µs typical)
• Data polling and Toggle Protocol for EPC
Status
• Ready/Busy signal connected on XP2INT
interrupt line
• Internal Power-On detection circuit
– Memory Erase in blocks
• One 16K Byte, two 8K Byte, one 32K Byte, one
to three 64K Byte blocks
• Each block can be erased separately
(1.5 second typical)
• Chip erase (8.5 second typical)
• Each block can be separately protected
against programming and erasing
• Each protected block can be temporary unpro-
tected
• When enabled, the read protection prevents
access to data in Flash memory using a pro-
gram running out of the Flash memory space.
Access to data of internal Flash can only be per-
formed with an inner protected program
– Erase Suspend and Resume Modes
• Read and Program another Block during erase
suspend
– Single Voltage operation, no need of dedicated
supply pin
– Low Power Consumption:
• 45mA max. Read current
• 60mA max. Program or Erase current
• Automatic Stand-by-mode (50µA maximum)
– 1000 Erase-Program Cycles per block, 20 years
of data retention time
– Operating temperature: -40 to +125
o
C / -40 to
+125
o
C
5.2 - Operational Overview
Read Mode
In standard mode (the normal operating mode)
the Flash appears like an on-chip ROM with the
same timing and functionality. The Flash module
offers a fast access time, allowing zero waitstate
access with CPU frequency up to 40MHz on
PQFP144 devices and up to 32MHz on TQFP144
devices. Instruction fetches and data operand
reads are performed with all addressing modes of
the ST10F269 instruction set.
In order to optimize the programming time of the
internal Flash, blocks of 8K Bytes, 16K Bytes,
32K Bytes, 64K Bytes can be used. But the size of
the blocks does not apply to the whole memory
space, see details in Table 2.
*Not available on 128K versions (reserved areas).
Table 2 : 128K or 256K Byte Flash Memory Block Organization
Block Addresses (Segment 0) Addresses (Segment 1) Size (byte)
0
1
2
3
4
5*
6*
00’0000h to 00’3FFFh
00’4000h to 00’5FFFh
00’6000h to 00’7FFFh
01’8000h to 01’FFFFh
02’0000h to 02’FFFFh
03’0000h to 03’FFFFh*
04’0000h to 04’FFFFh*
01’0000h to 01’3FFFh
01’4000h to 01’5FFFh
01’6000h to 01’7FFFh
01’8000h to 01’FFFFh
02’0000h to 02’FFFFh
03’0000h to 03’FFFFh*
04’0000h to 04’FFFFh*
16K
8K
8K
32K
64K
64K*
64K*