Owner manual

Communications Protocol for the FC-7501
9
This protocol complements Kramer’s “Protocol 2000” (Kramer’s switcher
protocol), so the two protocols can co-exist without disturbing one another.
(According to Protocol 2000, the FC-7501 appears as machine number 22,
so care should be taken not to set a switcher with this machine number).
Table 4: Structure of the Protocol
MSB LSB
INSTRUCTION
0 TO PC I5 I4 I3 I2 I1 I0
7 6 5 4 3 2 1 0
1st byte
DATA
1 D6 D5 D4 D3 D2 D1 D0
7 6 5 4 3 2 1 0
2nd byte
EXTENDED DATA
1 E6 E5 E4 E3 E2 E1 E0
7 6 5 4 3 2 1 0
3rd byte
MSB’s ADDR
1 E7 D7 1 0 1 1 0
7 6 5 4 3 2 1 0
4th byte
1
Note that the MSB’s of the DATA (D7) and the EXTENDED DATA (E7) are in the fourth byte.
Terminology:
 TO PC is the “DESTINATION BIT”
 I4..I0 is the “INSTRUCTION”
 D7..D0 is the “DATA”
 E7..E0 is the “EXTENDED DATA”
 A0 is the “LSB of the MACHINE ADDRESS”
The destination bit, TO PC, is 0 when sending from the PC to the machine, or 1 when sending from the machine to the PC.
Table 5: Instruction Set for the FC-7501
# INSTRUCTION
I5 I4 I3 I2 I1 I0
0 Reset 0 0 0 0 0 0
1 Read video standard 0 0 0 0 0 1
2 Write video standard 0 0 0 0 1 0
3 Read front-panel switch (video format) 0 0 0 0 1 1
4 Press front-panel switch (video format) 0 0 0 1 0 0
5 Read video field rate 0 0 0 1 0 1
6 Force video standard 0 0 0 1 1 0
10 Write EEPROM data – low address 0 0 1 0 1 0
11 Read EEPROM data – low address 0 0 1 0 1 1
12 Write I²C 0 0 1 1 0 0
13 Read I²C 0 0 1 1 0 1
16 Error 0 1 0 0 0 0
20 Write EEPROM data – high address 0 1 0 1 0 0
21 Read EEPROM data – high address 0 1 0 1 0 1
57 Enable “Power-down save” 1 1 1 0 0 1
61 Identify machine 1 1 1 1 0 1
1 Note that the MSB’s of the DATA (D7) and the EXTENDED DATA (E7) are in the fourth byte