Blackmagicdesign Design 3G-SDI Arduino Shield, Installation And Operation Manual, Page: 25 / 253

25 Developer Information
0x2100 - 0x21FE | OCDATA | R/W | SDI Control Override Data
| | |
0x3000 | ICARM | R/W | SDI Control Incoming Arm
0x3001 | ICLENGTH | R | SDI Control Incoming Length
0x3100 - 0x31FE | ICDATA | R | SDI Control Incoming Data
| | |
0x4000 | OTARM | R/W | SDI Tally Override Arm
0x4001 | OTLENGTH | R/W | SDI Tally Override Length
0x4100 - 0x41FE | OTDATA | R/W | SDI Tally Override Data
| | |
0x5000 | ITARM | R/W | SDI Tally Incoming Arm
0x5001 | ITLENGTH | R | SDI Tally Incoming Length
0x5100 - 0x51FE | ITDATA | R | SDI Tally Incoming Data
All multi-byte numerical fields are stored little-endian. Unused addresses are reserved and read
back as zero.
Register: IDENTITY (Board Identifier)
[ IDENTITY ]
31 0
**Identity:** ASCII string ‘SDIC’ (i.e. `0x43494453`) in hexadecimal.
Register: HWVERSION (Hardware Version)
[ VERSION MAJOR ] [ VERSION MINOR ]
15 8 7 0
**Version Major:** Hardware revision, major component.
**Version Minor:** Hardware revision, minor component.
Register: FWVERSION (Firmware Version)
[ VERSION MAJOR ] [ VERSION MINOR ]
15 8 7 0
**Version Major:** Firmware revision, major component.
**Version Minor:** Firmware revision, minor component.
Register: CONTROL (System Control)
[ RESERVED ] [ OVERRIDE OUTPUT ] [ RESET TALLY ] [ OVERRIDE TALLY ] [
OVERIDE CONTROL ]
7 4 3 2 1 0
**Reserved:** Always zero.
**Override Output:** When 1, the input SDI signal (if present) is discarded and the
shield generates its own SDI signal on the SDI output connector.
When 0, the input signal is passed through to the output if
present, or the shield generates its own SDI signal if not.
**Reset Tally:** When 1, the last received incoming tally data is immediately
copied over to the override tally data register. Automatically
cleared by hardware.
**Override Tally:** When 1, tally data is overridden with the user supplied data.
When 0, input tally data is passed through to the output
unmodified.
**Override Control:** When 1, control data is overridden with the user supplied data.
When 0, input control data is passed through to the output
unmodified.