AD9920ABBCZ datasheet(101/112 Pages) AD

101 / 112 page

AD9920A

Rev. B | Page 101 of 112

Table 59. Shutter and GPO Registers

Address

Data

Bits

Default

Value

Update

Type

Name

Description

0x70

[2:0]

PRIMARY_ACTION

Select action for primary and secondary counters.

[5:3]

SECOND_ACTION

0 = idle (do nothing): autoreset on VD.

1 = activate counter (primary: automatic exposure/read).

2 = RapidShot: wrap/repeat counter.

3 = ShotTimer: delay start of count.

4 = ShotTimer with RapidShot.

5 = SLR exposure (manual).

6 = SLR read (manual).

7 = force to idle.

[13:6]

MANUAL_TRIG

1: manual trigger for GP signals when Protocol 1 is selected.

Bit 6: GP1 manual trigger.

Bit 13: GP8 manual trigger.

0x71

[12:0]

PRIMARY_MAX

Primary counter maximum value.

[24:13]

SECOND_MAX

Secondary counter maximum value.

[27:25]

VDHD_MASK

Mask VD/HD during counter operation.

0x72

[12:0]

PRIMARY_DELAY

Number of fields to delay before the next primary count (exposure)

starts. For ShotTimer with RapidShot, the delay value is used between

each repetition.

[13]

PRIMARY_SKIP

For ShotTimer with RapidShot, use the primary delay value only before

the first count (exposure).

[26:14]

SECOND_DELAY

Number of fields to delay before the next secondary count (exposure)

starts. For ShotTimer with RapidShot, the delay value is used between

each repetition.

[27]

SECOND_SKIP

For ShotTimer with RapidShot, use the secondary delay value only

before the first count (exposure).

0x73

[2:0]

GP1_PROTOCOL

Selects protocol for each general-purpose signal.

[5:3]

GP2_PROTOCOL

0 = idle.

[8:6]

GP3_PROTOCOL

1 = no counter association. Use MANUAL_TRIG bits to enable each GP

signal.

[11:9]

GP4_PROTOCOL

2 = test use only.

[14:12]

GP5_PROTOCOL

3 = test use only.

[17:15]

GP6_PROTOCOL

4 = link to mode counter.

[20:18]

GP7_PROTOCOL

5 = link to primary counter.

[23:21]

GP8_PROTOCOL

6 = link to secondary counter.

7 = keep on.

0x74

[12:0]

SGMASK_NUM

Exposure duration (number of fields to mask SG) for LS operation.

[25:13]

VD/SG

SUBCKMASK_NUM

Exposure + readout duration (number of fields to mask SUBCK) for LS.

[26]

0x01

VD/SG

SUBCKTOG_UPDATE

0 = SUBCK HP toggles and the registers involved in SUBCK masking

(Register 0x78 and Register 0x74, Bits[27:13]) are updated at SG line.

1 = updated at update line (VD updated).

[27]

VD/SG

SUBCKMASK_SKIP1

Skip the SUBCK mask for the first exposure field only.

0x75

[0]

VD/SG

Test

Test purpose only. Must be set to 0.

[13:1]

SUBCKSUPPRESS

Number of lines after VSG line to begin SUBCK pulses.

[26:14]

SUBCKNUM

Number of SUBCK pulses per field. Must be set less than VDLEN.

[27]

SG_SUPPRESS

Suppress the SG and allow SUBCK to finish at SUBCKNUM.

0x76

[0]

VD/SG

SUBCK_POL

SUBCK start polarity.

[1]

TESTMODE

Test use only. Must be set to 0.

0x77

[13:0]

VD/SG

SUBCK_TOG1

SUBCK Toggle Position 1.

[27:14]

SUBCK_TOG2

SUBCK Toggle Position 2.

0x78

[13:0]

VD/SG

SUBCKHP_TOG1

High precision SUBCK Toggle Position 1.

[27:14]

SUBCKHP_TOG2

High precision SUBCK Toggle Position 2.

0x79

[25:0]

TESTMODE

Test use only. Must be set to 0.

AD9920ABBCZ Datasheet(PDF) 101 Page - Analog Devices

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