5.2.1 Group Block Protection

The Block Protection bits (BP0, BP1, BP2, BP3 and BP4) in Status Register 1 provide write protection to the memory array. Refer to Table 5-1 for details.

Table 5-1. Group Block Protection
Status Register 1					Memory Protection
BP4	BP3	BP2	BP1	BP0	Protected Blocks	Protected Address	Protected Density	Protected Portion
0	0	0	0	0	None	None	None	None
0	0	0	0	1	511	01FF0000h-01FFFFFFh	64 KB	Upper 1/512
0	0	0	1	0	510–511	01FE0000h-01FFFFFFh	128 KB	Upper 1/256
0	0	0	1	1	508–511	01FC0000h-01FFFFFFh	256 KB	Upper 1/128
0	0	1	0	0	504–511	01F80000h-01FFFFFFh	512 KB	Upper 1/64
0	0	1	0	1	496–511	01F00000h-01FFFFFFh	1 MB	Upper 1/32
0	0	1	1	0	480–511	01E00000h-01FFFFFFh	2 MB	Upper 1/16
0	0	1	1	1	448–511	01C00000h-01FFFFFFh	4 MB	Upper 1/8
0	1	0	0	0	384–511	01800000h-01FFFFFFh	8 MB	Upper 1/4
0	1	0	0	1	256–511	01000000h-01FFFFFFh	16 MB	Upper 1/2
1	0	0	0	0	None	None	None	None
1	0	0	0	1	0	00000000h-0000FFFFh	64 KB	Lower 1/512
1	0	0	1	0	0–1	00000000h-0001FFFFh	128 KB	Lower 1/256
1	0	0	1	1	0–3	00000000h-0003FFFFh	256 KB	Lower 1/128
1	0	1	0	0	0–7	00000000h-0007FFFFh	512 KB	Lower 1/64
1	0	1	0	1	0–15	00000000h-00FFFFFFh	1 MB	Lower 1/32
1	0	1	1	0	0–31	00000000h-01FFFFFFh	2 MB	Lower 1/16
1	0	1	1	1	0–63	00000000h-03FFFFFFh	4 MB	Lower 1/8
1	1	0	0	0	0–127	00000000h-07FFFFFFh	8 MB	Lower 1/4
1	1	0	0	1	0–255	00000000h-00FFFFFFh	16 MB	Lower 1/2
X	1	1	0	X	0–511	00000000h-01FFFFFFh	32 MB	ALL
X	1	X	1	X	0–511	00000000h-01FFFFFFh	32 MB	ALL