Satellite IF Switch
Table 2. DiSEqC Slave Control Interface Command Bytes
HEX VALUE
0x00
0x01
0x04
0x05
0x06
0x07
0x08
0x09
0x10
0x11
0x14
0x20
0x21
0x22
0x23
0x24
0x25
0x26
0x27
0x30
0x31
COMMAND
Reset
Clr Reset
Set Contend
Contend
Clr Contend
Address
Move C
Move
Status
Config
Switch 0
Set Lo
Set VR
Set Pos A
Set S0A
Set Hi
Set HL
Set Pos B
Set S0B
Sleep
Awake
FUNCTION
Reset DiSEqC decoder
Clear reset flag
Clears Status_reg, bit 0
Set contention flag
Sets Status_reg, bit 7
Return address only if contention flag is set
Reads Address_reg
Clear contention flag
Clears Status_reg, bit 7
Return address unless contention flag is set
Reads Address_reg
Change address only if contention flag is set
Writes to Address_reg
Change address unless contention flag is set
Writes to Address_reg
Read status register flags
Reads Status_reg
Read configuration flags
Reads Configuration_reg
Read switching state flags
Reads Switch_reg
Select the low local oscillator frequency
Clears Switch_reg, bit 4
Select vertical polarization (or right circular)
Clears Switch_reg, bit 5
Select satellite position A (or position C)
Clears Switch_reg, bit 6
Select switch option A (i.e. positions A/B)
Clears Switch_reg, bit 7
Select the high local oscillator frequency
Sets Switch_reg, bit 4
Select horizontal polarization (or left circular)
Sets Switch_reg, bit 5
Select satellite position B (or position D)
Sets Switch_reg, bit 6
Select switch option B (i.e. positions C/D)
Sets Switch_reg, bit 7
Ignore all bus commands except Awake
Sets Status_reg, bit 1
Respond to future bus commands normally
Clears Status_reg, bit 1
DATA BYTES
1 byte
1 byte
SLAVE REPLY
Framing byte
Framing byte
Framing byte
Framing + data
byte
Framing byte
Framing + data
byte
Framing byte
Framing byte
Framing + data
byte
Framing + data
byte
Framing + data
byte
Framing byte
Framing byte
Framing byte
Framing byte
Framing byte
Framing byte
Framing byte
Framing byte
Framing byte
Framing byte
11
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