Datasheet

AD9547 Data Sheet
Rev. E | Page 78 of 104
Table 76. Reference Logic Family
Address Bit Bit Name Description
0x0501
[7:6]
Ref BB logic family
Select the logic family for the REF BB input receiver (ignored if Bits[5:4] = 00).
00 (default) = disabled.
01 = 1.2 V to 1.5 V CMOS.
10 = 1.8 V to 2.5 V CMOS.
11 = 3.0 V to 3.3 V CMOS.
[5:4] Ref B logic family Select logic family for REF B input receiver.
00 (default) = differential (REFB/BB is positive/negative input).
01 = 1.2 V to 1.5 V CMOS.
10 = 1.8 V to 2.5 V CMOS.
11 = 3.0 V to 3.3 V CMOS.
[3:2] Ref AA logic family The same as Register 0x0501, Bits[7:6] but for REF AA.
[1:0]
Ref A logic family
The same as Register 0x0501, Bits[5:4] but for REF A.
0x0502 [7:0] Unused Unused.
Table 77. Manual Reference Profile Selection
Address
Bit
Bit Name
Description
0x0503
7
Enable Ref AA manual profile
Select manual or automatic reference profile assignment for REF AA.
0 (default) = automatic.
1 = manual.
[6:4]
Ref AA manual profile
Manual profile assignment.
000 (default) = Profile 0.
001 = Profile 1.
010 = Profile 2.
011 = Profile 3.
100 = Profile 4.
101 = Profile 5.
110 = Profile 6.
111 = Profile 7.
3 Enable Ref A manual profile Same as Register 0x0503, Bit 7 but for REF A.
[2:0] Ref A manual profile Same as Register 0x0503, Bits[6:4] but for REF A.
0x0504
7
Enable Ref BB manual profile
Same as Register 0x0503, Bit 7 but for REF BB.
[6:4]
Ref BB manual profile
Same as Register 0x0503, Bits[6:4] but for REF BB.
3
Enable Ref B manual profile
Same as Register 0x0503, Bit 7 but for REF B.
[2:0] Ref B manual profile Same as Register 0x0503, Bits[6:4] but for REF B.
0x0505
[7:0]
Unused
Unused.
0x0506 [7:0]
Table 78. Phase Build-Out Switching
Address Bit Bit Name Description
0x0507
[7:3]
Unused
Unused.
[2:0] Phase master threshold
priority
Threshold priority level (a value of 0 to 7, with 0 (default) being the highest priority
level). References with a selection priority value lower than this value are treated as
phase masters (see the profile registers for selection priority value).