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MAX12005 Datasheet, PDF (11/14 Pages) Maxim Integrated Products – Satellite IF Switch
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
—
Framing byte
—
Framing byte
—
—
—
—
1 byte
Framing byte
Framing + data
byte
Framing byte
Framing + data
byte
Framing byte
1 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