19.13.13 Security Areas Split Client Registers

This register can only be written if the WPEN bit is cleared in the Write Protection Mode Register.

Name:	MATRIX_SASSRx
Offset:	0x0240 + x*0x04 [x=0..14]
Property:	Read/Write


Bit	31	30	29	28	27	26	25	24
	SASPLIT7[3:0]				SASPLIT6[3:0]
Access	R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset


Bit	23	22	21	20	19	18	17	16
	SASPLIT5[3:0]				SASPLIT4[3:0]
Access	R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset


Bit	15	14	13	12	11	10	9	8
	SASPLIT3[3:0]				SASPLIT2[3:0]
Access	R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset


Bit	7	6	5	4	3	2	1	0
	SASPLIT1[3:0]				SASPLIT0[3:0]
Access	R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset

Bits 0:3, 4:7, 8:11, 12:15, 16:19, 20:23, 24:27, 28:31 – SASPLITx Security Areas Split for HSELx Security Region

This field defines the boundary address offset where the HSELx client security region splits into two Security Areas with access controlled according to the corresponding MATRIX_SSR. It also defines the Security Low Area size inside the HSELx region.

If this Low Area size is set at or above the HSELx Region Size, then the Security High Area is no longer available and the MATRIX_SSR settings for the Low Area apply to the entire HSELx Security Region.

When applicable to a client region, the initial value of MATRIX_SASSRx.SASPLITy is 0xF. When not applicable to a client region, the initial value of MATRIX_SASSRx.SASPLITy is 0x0.


SASPLITx	Split Offset	Security Low Area Size
0000	0x00001000	4 Kbytes
0001	0x00002000	8 Kbytes
0010	0x00004000	16 Kbytes
0011	0x00008000	32 Kbytes
0100	0x00010000	64 Kbytes
0101	0x00020000	128 Kbytes
0110	0x00040000	256 Kbytes
0111	0x00080000	512 Kbytes
1000	0x00100000	1 Mbyte
1001	0x00200000	2 Mbytes
1010	0x00400000	4 Mbytes
1011	0x00800000	8 Mbytes
1100	0x01000000	16 Mbytes
1101	0x02000000	32 Mbytes
1110	0x04000000	64 Mbytes
1111	0x08000000	128 Mbytes