MSC1210 datasheet(28/83 Pages) TI

28 / 83 page

MSC1210

SBAS203F − MARCH 2002 − REVISED NOVEMBER 2004

www.ti.com

The MSC1210 allows the user to partition the Flash

Memory between Program Memory and Data Memory. For

instance, the MSC1210Y5 contains 32kB of Flash

Memory on-chip. Through the HW configuration registers,

the user can define the partition between Program

Memory (PM) and Data Memory (DM), as shown in Table 3

and Table 4. The MSC1210 family offers four memory

configurations, as shown.

Table 3. MSC1210 Flash Partitioning

HCR0

MSC1210Y2

MSC1210Y3

MSC1210Y4

MSC1210Y5

DFSEL

000

0kB

4kB

0kB

8kB

0kB

16kB

0kB

32kB

001

0kB

4kB

0kB

8kB

0kB

16kB

0kB

32kB

010

0kB

4kB

0kB

8kB

0kB

16kB

011

0kB

4kB

0kB

8kB

24kB

8kB

100

0kB

4kB

12kB

4kB

28kB

4kB

101

2kB

6kB

2kB

14kB

2kB

30kB

2kB

110

3kB

1kB

7kB

1kB

15kB

1kB

31kB

1kB

111

(default)

4kB

0kB

8kB

0kB

16kB

0kB

32kB

0kB

NOTE: When a 0kB program memory configuration is selected, program

execution is external.

Table 4. MSC1210 Flash Memory Partitioning

HCR0

MSC1210Y2

MSC1210Y3

MSC1210Y4

MSC1210Y5

DFSEL

000

0000

0400-

13FF

0000

0400-

23FF

0000

0400-

43FF

0000

0000-

83FF

001

0000

0400-

13FF

0000

0400-

23FF

0000

0400-

43FF

0000

0400-

83FF

010

0000

0400-

13FF

0000

0400-

23FF

0000

0400-

43FF

0000-

3FFF

0400-

43FF

011

0000

0400-

13FF

0000

0400-

23FF

0000-

1FFF

0400-

23FF

0000-

5FFF

0400-

23FF

100

0000

0400-

13FF

0000-

0FFF

0400-

13FF

0000-

2FFF

0400-

13FF

0000-

6FFF

0400-

13FF

101

0000-

07FF

0400-

0BFF

0000-

17FF

0400-

0BFF

0000-

37FF

0400-

0BFF

0000-

77FF

0400-

0BFF

110

0000-

0BFF

0400-

07FF

0000-

1BFF

0400-

07FF

0000-

3BFF

0400-

07FF

0000-

7BFF

0400-

07FF

111

(default)

0000-

0FFF

0000

0000-

1FFF

0000

0000-

3FFF

0000

0000-

7FFF

0000

NOTE: Program memory accesses above the highest listed address will

access external program memory.

It is important to note that the Flash Memory is readable

and writable by the user through the MOVX instruction

when configured as either Program or Data Memory (via

the MXWS bit in the MWS, SFR 8Fh). This means that the

user may partition the device for maximum Flash Program

Memory size (no Flash Data Memory) and use Flash

Program Memory as Flash Data Memory. This may lead to

undesirable behavior if the PC points to an area of Flash

Program Memory that is being used for data storage.

Therefore, it is recommended to use Flash partitioning

when Flash Memory is used for data storage. Flash

partitioning prohibits execution of code from Data Flash

Memory. Additionally, the Program Memory erase/write

can be disabled through hardware configuration bits

(HCR0), while still providing access (read/write/erase) to

Data Flash Memory.

The effect of memory mapping on Program and Data

Memory is straightforward. The Program Memory is

decreased in size from the top of internal Program

Memory. Therefore, if the MSC1210Y5 is partitioned with

31kB of Flash Program Memory and 1kB of Flash Data

Memory, external Program Memory execution will begin at

7C00h (versus 8000h for 32kB). The Flash Data Memory

is added on top of the SRAM memory. Therefore, access

to Data Memory (through MOVX) will access SRAM for

addresses 0000h−03FFh and access Flash Memory for

addresses 0400h−07FFh.

Data Memory

The MSC1210 can address 64kB of Data Memory.

Scratchpad Memory provides 256 bytes in addition to the

64kB of Data Memory. The MOVX instruction is used to

access the Data SRAM Memory. This includes 1,024

bytes of on-chip Data SRAM Memory. The data bus values

do not appear on Port 0 (during data bus timing) for internal

memory access.

The MSC1210 also has on-chip Flash Data Memory which

is readable and writable (depending on Memory Write

Select register) during normal operation (full VDD range).

This memory is mapped into the external Data Memory

space directly above the SRAM.

The MOVX instruction is used to write the flash memory.

Flash memory must be erased before it can be written.

Flash memory is erased in 128 byte pages.

MSC1210 Datasheet(PDF) 28 Page - Texas Instruments

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