6 Data File Bit Orientation

This chapter specifies the data orientation of the binary data file generated by the Libero SoC Design Suite. The SPI-DirectC implementation must be in sync with the specified data orientation. The following table lists how the data is stored in the binary data file. For more information, see Data File Format.

Table 6-1. Binary Data File Example
Byte 0	Byte 1	Byte 2	Byte 3	..	..	Byte N
Bit7.Bit0	Bit15.Bit8	Bit23.Bit16	Bit35.Bit24	..	..	Bit(8N+7).Bit(8N)
Valid Data	Valid Data	Valid Data	Valid Data	..	..	o <-Valid Data

If the number of bits in a data block is not a multiple of eight, the rest of the Most Significant Bit (MSB) in the last byte are filled with zeros. The following example shows a given 70-bit data to be shifted into the target shift register from the Least Significant Bit (LSB) to the Most Significant Bit (MSB).

The following figure shows a binary representation of the same data.

Figure 6-1. Binary representation of data

This data is stored in the data block section. The following table lists how the data is stored in the data block.

Table 6-2. Data Block Section Example
Byte 0	Byte 1	Byte 2	Byte 3	Byte 4	..	Byte 8
Bit7...Bit0	Bit15.Bit8	Bit23.Bit16	Bit31.Bit24	Bit43.Bit32	..	Bit71..Bit64
10100110	01111000	10101100	01101111	10110000	-	00100000
A6	78	AC	6F	B0	-	20