Manual

MAX12005
Satellite IF Switch
12
Table 2. DiSEqC Slave Control Interface Command Bytes (continued)
Table 3. DiSEqC Slave Control Interface Registers
Note 1: Refer to DiSEqC Bus Functional Specification version 4.2, page 18.
Note 2: Refer to DiSEqC Bus Functional Specification version 4.2, page 22.
HEX VALUE COMMAND FUNCTION DATA BYTES SLAVE REPLY
0x38 Write N0
Write to port group 0
Controls Switch_reg, bits 7 downto 4 (Note 1)
1 byte Framing byte
0x50 LO string
Read current frequency
Reads Low_LOF_reg2/1 or High_LOF_reg2/1
depending on Switch_reg, bit 4 (Note 2)
—
Framing + 2 data
bytes
0x51 LO now
Read current frequency table entry number
Reads Low_LOF_reg0, bit 3 downto 0 or
High_LOF_reg0, bit 3 downto 0
depending on Switch_reg, bit 4
—
Framing + data
byte
0x52 LO Lo
Read low-frequency table entry number
Reads Low_LOF_reg0, bit 3 downto 0
—
Framing + data
byte
0x53 LO Hi
Read high-frequency table entry number
Reads High_LOF_reg0, bit 3 downto 0
—
Framing + data
byte
ADDRESS BIT ACC NAME FUNCTION DEFAULT
Address_reg 7:0 RW address DiSEqC address
LNB: 0x11
Switch: 0x14
Status_reg
7 RW contention Bus contention flag 0
6 R standby Standby mode 0
5 — Unused — —
4 R aux_power Auxiliary power available 0
3 — Unused — —
2 RW voltage 0 = Low DC, 1 = High DC
Depends on
voltage input
1 RW sleep 0 = Awake, 1 = Sleep 0
0 RW reset Reset flag 1
Configuration_reg
7 R analog Analog output facility 0
6 R standby Standby facility 0
5 R positioner Positioner capability 0
4 R power_detection External power-detection capability 0
3 R loop_through Loopthrough facility 0
2 R polarizer Polarizer capability 0
1 R switch Switcher capability 1
0 R lof_values LOF value output capability 1