Sundance SMT399-160 - Manual (Page 24)

1 Not Used High speed
synch
enable
Hardware
Manual
Sync
enable
Crystal
Output Pin
active
Not Used
Default ‘0’ ‘0’ ‘0’ ‘0’ ‘0’
DDS0 Register – 0x8 – Control Function Register
Setting High
Speed
Sync (Bit
11)
Description
0 0 The high-speed enhancement is off.
1 1 The high-speed enhancement is on.
DDS0 Register – 0x8 – Control Function Register
Setting Hardware
Manual
Synch
(Bit 10)
Description
0 0 The hardware synch function is off.
1 1 The hardware synch function is on.
DDS0 Register – 0x8 – Control Function Register
Setting Crystal
out pin
active
(Bit 9)
Description
0 0 CRYSTAL OUT pin is inactive.
1 1 CRYSTAL OUT pin is active.
DDS0 Register – 0x8 – Control Function Register
Setting Ref Clock
Multiplier
(Bit 7-3)
Description
Valid values are decimal 4-20 (0x4 to 0x14).
DDS0 Register – 0x8 – Control Function Register
Setting VCO
Range
(Bit 2) Description
0 0 The VCO operates in a range of 100MHz to 250MHz.
1 1 The VCO operates in a range of 250MHz to 400MHz.
DDS0 Register – 0x8 – Control Function Register
Setting Charge
Pump
Current
(Bit 1-0)
Description
0x0 (75uA), 0x1 (100uA), 0x2 (125uA) or 0x3 (150uA).
User Manual SMT399-160 Page 24 of 39 Last Edited: 24/05/2007 17:12:00