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AD9920A
Rev. B | Page 97 of 112
Table 53. Miscellaneous Registers
Address
Data
Bits
Default
Value
Default
Update
Type
Name
Description
0x10
[0]
0
SCK
SW_RST
Software reset. Bit self-clears to 0 when a reset occurs.
1 = reset Address 0x00 to Address 0xFF back to default values.
0x11
[0]
0
VD
OUT_CONTROL
0 = make all outputs dc inactive.
1 = enable outputs at next VD edge.
0x12
[0]
0x01
SCK
RST_SYNC_EN
0 = configure SYNC/RST as SYNC pin.
1 = configure SYNC/RST as RST pin (default configuration is RST).
[4:1]
0
Test
Test mode only. Must be set to 0.
0x13
[0]
0x01
SCK
SYNCENABLE
1 = external synchronization enable. Configure SYNC/RST pin as an input.
[1]
0
SYNCPOL
SYNC active polarity.
[2]
0
SYNCSUSPEND
Suspend clocks during SYNC active pulse.
0 = don’t suspend.
1 = suspend.
[3]
0
ENH_SYNC_EN
1 = enable enhanced sync/shutter operations.
[4]
0
SYNC_MASK_HD
1 = mask HD during SYNCSUSPEND.
[5]
0x01
SYNC_MASK_VD
1 = mask VD during SYNCSUSPEND.
[6]
0x01
SYNC_MASK_V
1 = mask XV outputs during SYNCSUSPEND.
[7]
0
Test
Test mode only. Must be set to 0.
[12:8]
0
Test
Test mode only. Must be set to 0.
[13]
0
Test
Test mode only. Must be set to 0.
[14]
0
SYNC_EDGE_EN
1 = enable SYNC to use only one edge to reset.
[15]
0
SYNC_RST_SHUTEN
1 = enable reset of the shutter control after SYNC operation occurs.
[16]
0
GPO_RST_SYNC
1 = reset shutter and GPO control at SYNC operation.
[17]
0
SYNC_CNT_INC
1 = increment field counter by 1 when SYNC occurs.
0 = reset to 0.
[19:18]
0
UNUSED
Set unused bits to 0.
[23:20]
0
Test
Test mode only. Must be set to 0.
[24]
0
SWSYNC
1 = initiate software SYNC event (self-clears to 0 after SYNC).
[25]
0
REG_RST_SHUT
1 = force shutter control to reset until REG_RST_SHUT = 0.
0x14
[0]
0
SCK
TGCORE_RST
Timing core reset bar.
0 = reset TG core.
1 = resume operation.
0x15
[0]
0
SCK
OSC_RST
CLO oscillator reset bar.
0 = oscillator in power-down state.
1 = resume oscillator operation.
0x16
[27:0]
0x01
SCK
Test
Test mode only. Must be set to 1.
0x17
[12:0]
0
SCK
Update
Serial update line. Sets the line (HD) within the field to update the
VD-updated registers.
[13]
0
PREVENTUP
Prevents the update of the VD-updated registers.
0 = normal update.
1 = prevent update of VD-updated registers.
0x18
[27:0]
0
SCK
Test
Test mode only. Set to 0.
0x19
[27:0]
0
SCK
Test
Test mode only. Set to 0.
0x1A
[27:0]
0
SCK
Test
Test mode only. Set to 0.
0x1B
[27:0]
0x0A
SCK
Test
Test mode only. Set to 0x0A.
0x1C
[23:0]
0
SCK
VSGSELECT
1 = each bit selects XV pulses for use as VSG pulses.
0x1D
[23:0]
0
SCK
VSGMASK_CTL
VSG masking. Overrides settings in field registers when enabled.
[24]
0
VSGMASK_CTL_EN
0 = disable VSGMASK_CTL bits. VSG masking is controlled by field registers.
1 = enable VSGMASK_CTL bits to control VSG masking.
0x1E
[27]
0
SCK
UNUSED
Do not access, or set to 0.
0x1F
[0]
0x01
SCK
HCNT14_EN
1 = enable 14-bit H-counter.
[1]
0x01
PBLK_MASK_EN
1 = disable clamp operation if PBLK is active at the same time as CLPOB.