
REV. 0
–12–
AD9937
Table III. H/LM System Register Map (Addr 0x15)
Bit
Breakdown
Bit
Width
Register
Name
Addr
Default
Function
HLM_Reg(0)
(11:0)
(23:12)
(31:24)
12
12
8
ENDADDRESS
STARTADDRESS Sub Word Start Address
HLM_Reg_Addr
System Register Address 0x15
Sub Word End Address
HLM_Reg(1)
0
1
2
3
4
5
(31:6)
1
1
1
1
1
1
26
0
0
1
1
0
0
H1APOL
H1BPOL
H1CPOL
H1DPOL
H2APOL
H2BPOL
Unused
H1A Special H-Pattern Start Polarity
H1B Special H-Pattern Start Polarity
H1C Special H-Pattern Start Polarity
H1D Special H-Pattern Start Polarity
H2A Special H-Pattern Start Polarity
H2B Special H-Pattern Start Polarity
HLM_Reg(2)
(5:0)
(11:6)
(17:12)
(31:18)
6
6
6
14
0x00
0x04
0x01
SPH1A1
SPH1B1
SPH1C1
Unused
H1A Special H-Pattern during LM Repetition 1
H1B Special H-Pattern during LM Repetition 1
H1C Special H-Pattern during LM Repetition 1
HLM_Reg(3)
(5:0)
(11:6)
(17:12)
(31:18)
6
6
6
14
0x07
0x08
0x22
SPH1D1
SPH2A1
SPH2B1
Unused
H1D Special H-Pattern during LM Repetition 1
H2A Special H-Pattern during LM Repetition 1
H2B Special H-Pattern during LM Repetition 1
HLM_Reg(4)
(5:0)
(11:6)
(17:12)
(31:18)
6
6
6
14
0x34
0x34
0x04
SPH1A2
SPH1B2
SPH1C2
Unused
H1A Special H-Pattern during LM Repetition 2
H1B Special H-Pattern during LM Repetition 2
H1C Special H-Pattern during LM Repetition 2
HLM_Reg(5)
(5:0)
(11:6)
(17:12)
(31:18)
6
6
6
14
0x04
0x3A
0x0B
SPH1D2
SPH2A2
SPH2B2
Unused
H1D Special H-Pattern during LM Repetition 2
H2A Special H-Pattern during LM Repetition 2
H2B Special H-Pattern during LM Repetition 2
HLM_Reg(6)
(5:0)
(11:6)
(17:12)
(31:18)
6
6
6
14
0x3D
0x3F
0x3C
SPH1A3
SPH1B3
SPH1C3
Unused
H1A Special H-Pattern during LM Repetition 3
H1B Special H-Pattern during LM Repetition 3
H1C Special H-Pattern during LM Repetition 3
HLM_Reg(7)
(5:0)
(11:6)
(17:12)
(31:18)
6
6
6
14
0x3C
0x03
0x02
SPH1D3
SPH2A2
SPH2B3
Unused
H1D Special H-Pattern during LM Repetition 3
H2A Special H-Pattern during LM Repetition 3
H2B Special H-Pattern during LM Repetition 3
HLM_Reg(8)
(7:0)
(15:8)
(23:16)
(31:24)
8
8
8
8
99
5
55
87
LMLEN0
LMTOG1_0
LMTOG2_0
SPHSTART0
LM Pattern 0 (LM0): LM Counter Length
LM Pattern 0 (LM0): Toggle Position 1
LM Pattern 0 (LM0): Toggle Position 2
LM Pattern 0 (LM0): Special H Pulse Start Position
HLM_Reg(9)
(7:0)
(15:8)
(23:16)
(31:24)
8
8
8
8
29
2
26
0
LMLEN1
LMTOG1_1
LMTOG2_1
SPHSTART1
LM Pattern 1 (LM1): LM Counter Length
LM Pattern 1 (LM1): Toggle Position 1
LM Pattern 1 (LM1): Toggle Position 2
LM Pattern 1 (LM1): Special H Pulse Start Position