TN0108

Memory and memory control

Doc ID 15874 Rev 2

7/26

2

Memory and memory control

2.1

SRAM size

The SPC560B Cut 1.1 MCU has 32 Kbytes of SRAM. This has been increased on the Cut 2

MCU to 48 Kbytes. The additional SRAM has been added below the existing 32 Kbyte block

to create a contiguous 48 KB block on Cut 2.

Caution:

When using the Cut 2 device, you need to ensure that the RAM initialisation routine is

modified to include the additional memory space, in order to avoid any ECC errors when

reading from the SRAM. Even a 16-bit write could cause an ECC error, as it is implemented

as a 32-bit read modify write in order to update the ECC.

Table 3.

SRAM size differences

Silicon revision

SRAM memory

Start address

End address

Size

SPC560B Cut 1.1

0x4000_0000

0x4000_7FFF

32 Kbytes

SPC560B Cut 2

0x4000_0000

0x4000_BFFF

48 Kbytes