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MAX12005 Datasheet, PDF (11/14 Pages) Maxim Integrated Products – Satellite IF Switch | |||
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Satellite IF Switch
Table 2. DiSEqC Slave Control Interface Command Bytes
HEX VALUE
0x00
0x01
COMMAND
Reset
Clr Reset
FUNCTION
Reset DiSEqC decoder
Clear reset flag
Clears Status_reg, bit 0
0x04
Set Contend
Set contention flag
Sets Status_reg, bit 7
0x05
Contend
Return address only if contention flag is set
Reads Address_reg
0x06
Clr Contend
Clear contention flag
Clears Status_reg, bit 7
0x07
Address
Return address unless contention flag is set
Reads Address_reg
0x08
0x09
Move C
Move
Change address only if contention flag is set
Writes to Address_reg
Change address unless contention flag is set
Writes to Address_reg
0x10
Status
Read status register flags
Reads Status_reg
0x11
Config
Read configuration flags
Reads Configuration_reg
0x14
Switch 0
Read switching state flags
Reads Switch_reg
0x20
Set Lo
Select the low local oscillator frequency
Clears Switch_reg, bit 4
0x21
Set VR
Select vertical polarization (or right circular)
Clears Switch_reg, bit 5
0x22
Set Pos A
Select satellite position A (or position C)
Clears Switch_reg, bit 6
0x23
Set S0A
Select switch option A (i.e. positions A/B)
Clears Switch_reg, bit 7
0x24
Set Hi
Select the high local oscillator frequency
Sets Switch_reg, bit 4
0x25
Set HL
Select horizontal polarization (or left circular)
Sets Switch_reg, bit 5
0x26
Set Pos B
Select satellite position B (or position D)
Sets Switch_reg, bit 6
0x27
Set S0B
Select switch option B (i.e. positions C/D)
Sets Switch_reg, bit 7
0x30
Sleep
Ignore all bus commands except Awake
Sets Status_reg, bit 1
0x31
Awake
Respond to future bus commands normally
Clears Status_reg, bit 1
DATA BYTES SLAVE REPLY
â
Framing byte
â
Framing byte
â
â
â
â
1 byte
Framing byte
Framing + data
byte
Framing byte
Framing + data
byte
Framing byte
1 byte
â
â
â
â
Framing byte
Framing + data
byte
Framing + data
byte
Framing + data
byte
Framing byte
â
Framing byte
â
Framing byte
â
Framing byte
â
Framing byte
â
Framing byte
â
Framing byte
â
Framing byte
â
Framing byte
â
Framing byte
11
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