Datasheet
AD9979
Rev. C | Page 49 of 56
Address
Data
Bits
Default
Value
Update
Type Name Description
53 [1:0] 0 VD GPO_OUTPUT_EN Enable both GPOs.
0 = both disabled.
3 = both enabled.
[3:2] 0 SEL_GPO1 Select signal for GPO1 output.
0 = GPO.
1 = CLPOB.
2 = PBLK.
3 = DLL_SIGNAL_GPO.
[5:4] 0 SEL_GPO2 Select signal for GPO2 output.
2
[7:6] 0 SEL_HS_GPO1 Select which high speed timing signal is used for GPO1 output.
0 = delayed CLI.
1 = delayed ADC output latch clock.
2 = delayed SHD sample clock.
3 = delayed SHP sample clock.
[9:8] 0 SEL_HS_GPO2 Select which high speed timing signal is used for GPO2 output.
3
[10] 0 HBLK_EXT Enable external HBLK signal to be an input to GPO2.
[27:11] Unused Set unused bits to 0 if accessed.
54 [3:0] 0 VD GPT1_TOG1_FIELD General-Purpose Signal 1, first toggle position, field location.
[12:4] Unused Set unused bits to 0 if accessed.
[25:13] 0 GPT1_TOG1_LINE General-Purpose Signal 1, first toggle position, line location.
[27:26] Unused Set unused bits to 0 if accessed.
55 [12:0] 0 VD GPT1_TOG1_PIXEL General-Purpose Signal 1, first toggle position, pixel location.
[16:13] 0 GPT1_TOG2_FIELD General-Purpose Signal 1, second toggle position, field location.
[27:19] Unused Set unused bits to 0 if accessed.
56 [12:0] 0 VD GPT1_TOG2_LINE General-Purpose Signal 1, second toggle position, line location.
[25:13] 0 GPT1_TOG2_PIXEL General-Purpose Signal 1, second toggle position, pixel location.
[27:25] Unused Set unused bits to 0 if accessed.
57 [3:0] 0 VD GPT2_TOG1_FIELD General-Purpose Signal 2, first toggle position, field location.
[12:4] Unused Set unused bits to 0 if accessed.
[25:13] 0 GPT2_TOG1_LINE General-Purpose Signal 2, first toggle position, line location.
[27:26] Unused Set unused bits to 0 if accessed.
58 [12:0] 0 VD GPT2_TOG1_PIXEL General-Purpose Signal 2, first toggle position, pixel location.
[16:13] 0 GPT2_TOG2_FIELD General-Purpose Signal 2, second toggle position, field location.
[27:19] Unused Set unused bits to 0 if accessed.
59 [12:0] 0 VD GPT2_TOG2_LINE General-Purpose Signal 2, second toggle position, line location.
[25:13] 0 GPT2_TOG2_PIXEL General-Purpose Signal 2, second toggle position, pixel location.
[27:25] Unused Set unused bits to 0 if accessed.
5A to 5F [27:0] Unused Set unused registers to 0 if accessed.
1
See Address 52, Bits[1:0] for setting options.
2
See Address 53, Bits[3:2] for setting options.
3
See Address 53, Bits[7:6] for setting options.