Datasheet

ADAS1000/ADAS1000-1/ADAS1000-2 Data Sheet
Rev. A | Page 56 of 80
Table 27. Lead-Off Control Register (LOFFCTL) Address 0x02, Reset Value = 0x000000
R/W
Default Bit Name Function
R/W 0 23 LAPH AC lead-off phase.
0 (default)
= in phase.
1 = 180° out of phase.
R/W 0 22 LLPH
R/W 0 21 RAPH
R/W 0 20 V1PH
R/W 0 19 V2PH
R/W 0 18 CEPH
R/W 0 17 LAACLOEN Individual electrode ac lead-off enable. AC lead-off enables are the OR of ACSEL and the
individual ac lead-off channel enables.
0 (default)
= ac lead-off disabled.
1 = ac lead-off enabled.
R/W 0 16 LLACLOEN
R/W 0 15 RAACLOEN
R/W
0
14
V1ACLOEN
R/W 0 13 V2ACLOEN
R/W 0 12 CEACLOEN
R 0 [11:9] Reserved Reserved, set to 0.
R/W 00 [8:7] ACCURRENT Set current level for ac lead-off.
00 (default)
= 12.5 nA rms.
01 = 25 nA rms.
10 = 50 nA rms.
11 = 100 nA rms.
00 [6:5] Reserved Reserved, set to 0.
R/W 000 [4:2] DCCURRENT Set current level for dc lead-off (active only for ACSEL = 0).
000 (default)
= 0 nA.
001 = 10 nA.
010 = 20 nA.
011 = 30 nA.
100 = 40 nA.
101 = 50 nA.
110 = 60 nA.
111 = 70 nA.
R/W 0 1 ACSEL DC or AC (out-of-band) lead-off detection.
ACSEL acts as a global ac lead-off enable for RA, LL, LA, V1, V2 electrodes (CE ac lead-off is not
enabled using ACSEL). AC lead-off enables are the OR of ACSEL and the individual ac lead-off
channel enables.
If LOFFEN = 0, this bit is don’t care.
If LOFFEN = 1,
0 (default)
= dc lead-off detection enabled. (Individual ac lead-off can be enabled through
Bits[17:12].)
1 = dc lead-off detection disabled. AC lead-off detection enabled (all electrodes except CE
electrode).
When the calibration DAC is enabled, ac lead-off is disabled.
R/W 0 0 LOFFEN Enable lead-off detection.
0 (default)
= lead-off disabled.
1 = lead-off enabled.