Datasheet

11011B–ATARM–21-Feb-12

SAM3N

In the same way, the Clear Lock command (CLB) is used to clear lock bits.

Lock bits can be read using Get Lock Bit command (GLB). The n

lock bit is active when the bit

n of the bit mask is set..

19.2.5.5 Flash General-purpose NVM Commands

General-purpose NVM bits (GP NVM bits) can be set using the Set GPNVM command (SGPB).

This command also activates GP NVM bits. A bit mask is provided as argument to the com-

mand. When bit 0 of the bit mask is set, then the first GP NVM bit is activated.

In the same way, the Clear GPNVM command (CGPB) is used to clear general-purpose NVM

bits. The general-purpose NVM bit is deactivated when the corresponding bit in the pattern value

is set to 1.

General-purpose NVM bits can be read using the Get GPNVM Bit command (GGPB). The n

GP NVM bit is active when bit n of the bit mask is set..

Table 19-11. Set and Clear Lock Bit Command

Step Handshake Sequence MODE[3:0] DATA[15:0] or DATA[7:0]

1 Write handshaking CMDE SLB or CLB

2 Write handshaking DATA Bit Mask

Table 19-12. Get Lock Bit Command

Step Handshake Sequence MODE[3:0] DATA[15:0] or DATA[7:0]

1 Write handshaking CMDE GLB

2 Read handshaking DATA

Lock Bit Mask Status

0 = Lock bit is cleared

1 = Lock bit is set

Table 19-13. Set/Clear GP NVM Command

Step Handshake Sequence MODE[3:0] DATA[15:0] or DATA[7:0]

1 Write handshaking CMDE SGPB or CGPB

2 Write handshaking DATA GP NVM bit pattern value

Table 19-14. Get GP NVM Bit Command

Step Handshake Sequence MODE[3:0] DATA[15:0] or DATA[7:0]

1 Write handshaking CMDE GGPB

2 Read handshaking DATA

GP NVM Bit Mask Status

0 = GP NVM bit is cleared

1 = GP NVM bit is set