AD9949
Rev. B | Page 16 of 36
Table 12. HBLK Register Map
Address
Data Bit
Content
Default Value
(Hex)
Name Description
40 [0] 0 HBLKDIR
HBLK Internal/External.
0 = Internal.
1 = External.
41 [0] 0 HBLKPOL
HBLK External Active Polarity.
0 = Active Low.
1 = Active High.
42 [0] 1 HBLKEXTMASK
HBLK External Masking Polarity.
0 = Mask H1 Low.
1 = Mask H1High.
43 [3:0] F HBLKMASK
HBLK Internal Masking Polarity for Each Sequence 0 to 3.
0 = Mask H1 Low.
1 = Mask H1 High.
44 [23:0] FFFFFF HBLKTOG12_0 Sequence 0. Toggle Position 1 [11:0] and Toggle Position 2 [23:12].
45 [23:0] FFFFFF HBLKTOG34_0 Sequence 0. Toggle Position 3 [11:0] and Toggle Position 4 [23:12].
46 [23:0] FFFFFF HBLKTOG56_0 Sequence 0. Toggle Position 5 [11:0] and Toggle Position 6 [23:12].
47 [23:0] FFFFFF HBLKTOG12_1 Sequence 1. Toggle Position 1 [11:0] and Toggle Position 2 [23:12].
48 [23:0] FFFFFF HBLKTOG34_1 Sequence 1. Toggle Position 3 [11:0] and Toggle Position 4 [23:12].
49 [23:0] FFFFFF HBLKTOG56_1 Sequence 1. Toggle Position 5 [11:0] and Toggle Position 6 [23:12].
4A [23:0] FFFFFF HBLKTOG12_2 Sequence 2. Toggle Position 1 [11:0] and Toggle Position 2 [23:12].
4B [23:0] FFFFFF HBLKTOG34_2 Sequence 2. Toggle Position 3 [11:0] and Toggle Position 4 [23:12].
4C [23:0] FFFFFF HBLKTOG56_2 Sequence 2. Toggle Position 5 [11:0] and Toggle Position 6 [23:12].
4D [23:0] FFFFFF HBLKTOG12_3 Sequence 3. Toggle Position 1 [11:0] and Toggle Position 2 [23:12].
4E [23:0] FFFFFF HBLKTOG34_3 Sequence 3. Toggle Position 3 [11:0] and Toggle Position 4 [23:12].
4F [23:0]
FFFFFF
0
HBLKTOG56_3
HBLKSCP0
Sequence 3. Toggle Position 5 [11:0] and Toggle Position 6[23:12].
HBLK Sequence-Change Position 0 (Hard-coded to 0).
50 [7:0] 0 HBLKSPTR HBLK Sequence Pointers for Region 0 [1:0], 1 [3:2], 2 [5:4], 3 [7:6].
51 [11:0] FFF HBLKSCP1 HBLK Sequence-Change Position 1.
52 [11:0] FFF HBLKSCP2 HBLK Sequence-Change Position 2.
53 [11:0] FFF HBLKSCP3 HBLK Sequence-Change Position 3.
Table 13. H1 to H2, RG, SHP, SHD Register Map
Address
Data Bit
Content
Default Value Name Description
60 [12:0] 01001 H1CONTROL
H1 Signal Control. Polarity [0](0 = Inversion, 1 = No Inversion).
H1 Positive Edge Location [6:1].
H1 Negative Edge Location [12:7].
61 [12:0] 00801 RGCONTROL
RG Signal Control. Polarity [0](0 = Inversion, 1 = No Inversion).
RG Positive Edge Location [6:1].
RG Negative Edge Location [12:7].
62 [14:0] 0 DRVCONTROL
Drive Strength Control for H1 [2:0], H2 [5:3], H3 [8:6], H4 [11:9], and RG
[14:12].
Drive Current Values: 0 = Off, 1 = 4.3 mA, 2 = 8.6 mA,
3 = 12.9 mA, 4 = 17.2 mA, 5 = 21.5 mA, 6 = 25.8 mA, 7 = 30.1 mA.
63 [11:0] 00024 SAMPCONTROL
SHP/SHD Sample Control. SHP Sampling Location [5:0]. SHD Sampling
Location [11:6].
64 [5:0] 0 DOUTPHASE DOUT Phase Control.