The TMS320C28x is one of several fixed-point CPUs in the TMS320™ family. It has a 16-bit addressable architecture compared to 8-bit addressable architecture like Arm® CPUs.

In a 8-bit addressable architecture, every 8 bits of data has a unique address, where as in a 16-bit addressable device , every 16 bits of data has a unique address. Hence, in a 16-bit architecture, the smallest addressable unit of memory and the smallest data type supported is 16 bits.

Historically, byte is defined as the smallest addressable unit of memory. Hence, technically, the size of a byte is hardware dependent: 16 bits for C28x devices and 8 bits for Arm devices. But nowadays, byte is used as a synonym of 8 bits, since majority of the device architectures are 8 bit addressable. To avoid the confusion, let us use the terminology 8-bit bytes and 16-bit words

Byte and Word Usage in the device feature set Documentation:

From the C28x compiler's perspective, the memory size is always expressed in smallest addressable units, which is 16 bits. This includes the memory length, code/data size provided in the linker cmd files, .map file, and so forth. The standard sizeof() function also returns the size in 16 bits.

• Memory Map Table in device-specific data sheet:
  Table 2-1 Memory Map Table

  Memory	Size	Start Address	End Address
  LS0 RAM	2K × 16	0x0000 8000	0x0000 87FF
  LS1 RAM	2K × 16	0x0000 8800	0x0000 8FFF

• Linker command file:

  RAMLS0     : origin = 0x00008000,  length = 0x0800
  RAMLS1     : origin = 0x00008800,  length = 0x0800

• .map file generated by Code Composer Studio™ (CCS):

  MEMORY CONFIGURATIONS
  
        name          origin       length        used          unused       attr
  -------------      --------      ------        ----          ------       ----
    RAMLS0           00008000     00000800     00000112      000006ee      RWIX
    RAMLS1           00008800     00000800     00000194      0000066c      RWIX

• sizeof(uint32_t) = 2 → 2 * 16 bits