Kramer Electronics FC-7501 - Manual (Page 12)

KRAMER: SIMPLE CREATIVE TECHNOLOGY
Communications Protocol for the FC-7501
10
8.1 Description of Instructions
INSTRUCTION 0 – RESET
DATA=0: initialize the machine.
When the machine is initialized, it will send the RESET code (DATA = 0). If the machine receives this code, it will reset to
its “power-up” state.
DATA=1: configure the machine to its factory default state.
When the machine receives this code, all programmable parameters will be reset to their factory-default values.
EXTENDED DATA - set as 0.
INSTRUCTION 1 – READ INPUT STANDARD
For sending to machine, set DATA = EXTENDED DATA = 0.
When replying:- DATA = INPUT STANDARD; EXTENDED DATA = 0.
The PC sends this instruction to the machine. The machine replies by sending back the INPUT STANDARD, defined as per
the table below:
Table 6: Input Standard
STANDARD E2 E1 E0
NTSC (J, M) 0 0 0
PAL (B, G, H, I, N) 0 0 1
PAL-M 0 1 0
Combination PAL-N 0 1 1
NTSC 4.43 1 0 0
INSTRUCTION 2 – WRITE VIDEO STANDARD
DATA = set as video standard (see table above). This is valid for CV and Y/C formats.
The PC sends the video standard to the machine. The standard is implemented, and the machine replies by sending the same
data back to the PC.
Note that the machine should be set for “forced video standard” (instruction #6) if using this instruction, (since the unit will
otherwise detect - and revert back to - the standard of the current video input).
INSTRUCTION 3 – READ FRONT-PANEL SWITCH (read format)
When sending to machine:- DATA, EXTENDED DATA - set as 0.
When replying:- DATA = front-panel switch number (0=CV, 1=Y/C, 2=Component).; EXTENDED DATA = 0.
The PC sends this instruction to the machine. The machine replies by sending back a value relating to the current video
format.
INSTRUCTION 4 – PRESS FRONT-PANEL SWITCH (select format)
DATA = front-panel switch number (0=CV, 1=Y/C, 2=Component).
EXTENDED DATA - set as 0.
- When the machine receives this instruction, it selects the new video format – as is done if the front-panel switch was
pressed. If this results in a change in the video format, then the unit replies by sending the same data back to the PC.
INSTRUCTION 5 – READ FIELD RATE
When sending to machine:- DATA, EXTENDED DATA - set as 0.
When replying:- DATA=0 for 60Hz field rate; DATA=1 for 50Hz field rate; EXTENDED DATA=0.
The PC sends this instruction to the machine. The machine replies by sending back a value relating to the current video field
rate.
INSTRUCTION 6 – FORCE VIDEO STANDARD
DATA = 0 to allow the unit to automatically detect and decode the input standard; DATA = 1 to force the unit to decode a
video standard (see instruction #2). This instruction is valid for CV and Y/C formats.
The PC sends the data to the machine, and the machine replies by sending the same data back to the PC.
INSTRUCTION 10 & 20 – WRITE EEPROM DATA
DATA = EEPROM sub-address; EXTENDED DATA = data to be written to this sub-address.
The PC sends data directly to the EEPROM. The EEPROM stores this new value, and replies by sending the same data back
to the PC.
CAUTION – this function was designated for development and testing purposes. Improper use of this function may cause
erratic behaviour of the machine.
INSTRUCTION 11 & 21 – READ EEPROM DATA
For sending to machine, DATA = EEPROM sub-address.
When replying:- DATA = EEPROM sub-address; EXTENDED DATA = requested data.
The PC sends this instruction to the machine. The machine replies by sending back the data of this sub-address.