Datasheet

AD9954
Rev. B | Page 27 of 40
Register
Name
(Serial
Address)
Bit
Range
(MSB)
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1
(LSB)
Bit 0
Default
Value Or
Profile
Profile 1
RAM
Segment
Control
Word No. 1
(RSCW1)
(0x08)
<7:0>
RAM Segment 1 Mode
Control<2:0>
No-Dwell
Active
RAM Segment 1 Beginning Address<9:6>
PS0 = 1
PS1 = 0
<15:8> RAM Segment 1 Beginning Address<5:0>
RAM Segment 1
Final Address<9:8>
PS0 = 1
PS1 = 0
<23:16> RAM Segment 1 Final Address<7:0>
PS0 = 1
PS1 = 0
<31:24> RAM Segment 1 Address Ramp Rate<15:8>
PS0 = 1
PS1 = 0
<39:32> RAM Segment 1 Address Ramp Rate<7:0>
PS0 = 1
PS1 = 0
Profile 2
RAM
Segment
Control
Word No. 2
(RSCW2)
(0x09)
<7:0>
RAM Segment 2 Mode
Control<2:0>
No-Dwell
Active
RAM Segment 2 Beginning Address<9:6>
PS0 = 0
PS1 = 1
<15:8> RAM Segment 2 Beginning Address <5:0>
RAM Segment 2
Final Address<9:8>
PS0 = 0
PS1 = 1
<23:16> RAM Segment 2 Final Address<7:0>
PS0 = 0
PS1 = 1
<31:24> RAM Segment 2 Address Ramp Rate<15:8>
PS0 = 0
PS1 = 1
<39:32> RAM Segment 2 Address Ramp Rate<7:0>
PS0 = 0
PS1 = 1
Profile 3
RAM
Segment
Control
Word No. 3
(RSCW3)
(0x0A)
<7:0>
RAM Segment 3 Mode
Control<2:0>
No-Dwell
Active
RAM Segment 3 Beginning Address<9:6>
PS0 = 1
PS1 = 1
<15:8> RAM Segment 3 Beginning Address<5:0>
RAM Segment 3
Final Address <9:8>
PS0 = 1
PS1 = 1
<23:16> RAM Segment 3 Final Address<7:0>
PS0 = 1
PS1 = 1
<31:24> RAM Segment 3 Address Ramp Rate<15:8>
PS0 = 1
PS1 = 1
<39:32> RAM Segment 3 Address Ramp Rate<7:0>
PS0 = 1
PS1 = 1
RAM (0x0B) RAM [1023:0]<31:0> (Read Instructions Write Out RAM Signature Register Data)