Exploration of Uninitialized Configuration Memory Space for Intrinsic Identification of Xilinx Virtex-5 FPGA Devices

Table 2

Number of constant zeros, ones, and flipping bits.

Device	Ones		Zeros		Flipping
A	7798	59,4%	4238	32,3%	1084	8,3%
A	7744	59,0%	4190	31,9%	1186	9,0%
B	7698	58,7%	4435	33,8%	987	7,5%
B	7661	58,4%	4414	33,6%	1045	8,0%
C	7388	56,3%	4676	35,6%	1056	8,0%
C	7325	55,8%	4642	35,4%	1153	8,8%
D	7702	58,7%	4479	34,1%	939	7,2%
D	7638	58,2%	4432	33,8%	1050	8,0%
E	7626	58,1%	4350	33,2%	1144	8,7%
E	7566	57,7%	4357	33,2%	1197	9,1%
F	7517	57,3%	4418	33,7%	1185	9,0%
F	7491	57,1%	4352	33,2%	1277	9,7%
G	7498	57,1%	4577	34,9%	1045	8,0%
G	7418	56,5%	4543	34,6%	1159	8,8%
H	7537	57,4%	4543	34,6%	1040	7,9%
H	7460	56,9%	4552	34,7%	1108	8,4%