AD9920A
Rev. B | Page 12 of 112
Pin No.
Mnemonic
E11
SYNC/RST
DO
SYNC Pin (Internal Pull-Up Resistor)/External Reset Input (Active Low).
K9
SL
DI
3-Wire Serial Load Pulse (Internal Pull-Up Resistor).
K10
SDATA
DI
3-Wire Serial Data.
L10
SCK
DI
3-Wire Serial Clock.
B11
VDR_EN
DI
Enable V-Outputs When High.
K11
XSUBCNT
DI
XSUBCNT Input to SUBCK Buffer.
C9
SRSW
DI
Slew Rate Control Enable. Tie to ground to disable.
J6
LEGEN
DI
Legacy Mode Enable Bar. Tie to ground for legacy 18-channel mode.
J5
CLI
DI
Reference Clock Input.
K5
CLO
DO
Clock Output for Crystal.
F10
GPO1
DO
General-Purpose Output.
H9
GPO2
DO
General-Purpose Output.
G10
GPO3
DO
General-Purpose Output.
F11
GPO4
DO
General-Purpose Output.
H10
GPO7
DO
General-Purpose Output.
J11
GPO8
DO
General-Purpose Output.
B9
D0
DO
Data Output (LSB).
C6
D1
DO
Data Output.
C7
D2
DO
Data Output.
A8
D3
DO
Data Output.
A7
D4
DO
Data Output.
B7
D5
DO
Data Output.
B6
D6
DO
Data Output.
A6
D7
DO
Data Output.
A5
D8
DO
Data Output.
B4
D9
DO
Data Output.
A4
D10
DO
Data Output.
A3
D11
DO
Data Output (MSB).
B3
DCLK
DO
Data Clock Output.
D1
H1
DO
CCD Horizontal Clock.
D2
H2
DO
CCD Horizontal Clock.
F1
H3
DO
CCD Horizontal Clock.
F2
H4
DO
CCD Horizontal Clock.
H1
H5
DO
CCD Horizontal Clock.
H2
H6
DO
CCD Horizontal Clock.
K1
H7
DO
CCD Horizontal Clock.
K2
H8
DO
CCD Horizontal Clock.
L2
HL
DO
CCD Horizontal Clock.
L4
RG
DO
CCD Reset Gate Clock.
G9
V1A
VO3
CCD Vertical Transfer Clock. Three-level output (XV1 + XV16).
G6
V1B
VO3
CCD Vertical Transfer Clock. Three-level output (XV1 + XV17).
G5
V2A
VO3
CCD Vertical Transfer Clock. Three-level output (XV2 + XV18).
E9
V2B
VO3
CCD Vertical Transfer Clock. Three-level output (XV2 + XV19).
J9
V3A
VO3
CCD Vertical Transfer Clock. Three-level output (XV3 + XV20).
F6
V3B
VO3
CCD Vertical Transfer Clock. Three-level output. LEGEN is low, XV3 + XV21. LEGEN is high,
XV23 + XV21.
F5
V4
VO3
CCD Vertical Transfer Clock. Three-level output (XV4 + XV22).
E5
V5
VO3
CCD Vertical Transfer Clock. Three-level output. LEGEN is low, XV5 + XV23. LEGEN is high,
XV5 + GPO5.
D10
V6
VO3
CCD Vertical Transfer Clock. Three-level output. LEGEN is low, XV6 + XV24. LEGEN is high,
XV6 + GPO6.
F9
V7
VO2
CCD Vertical Transfer Clock. Two-level output (XV7).
F7
V8
VO2
CCD Vertical Transfer Clock. Two-level output (XV8).