STM8SPLNB1 datasheet(11/44 Pages) STMICROELECTRONICS

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STM8SPLNB1

STM8SPLNB1 operation

2.2

DiSEqC commands details

2.2.1

Command signaling

To be detected, the DiSEqC-ST commands must be sent after a voltage change from 13 to

18 V. A delay time between 4 ms and 24 ms must be respected before sending the DiSEqC-

ST commands (see Figure 5: Signaling of the DiSEqC-ST command).

Figure 5. Signaling of the DiSEqC-ST command

2.2.2

Command 0x0F

STM8SPLNB1 devices are shipped to customers with a default parameter values. These

parameters can be updated using a dedicated 0x0F DiSEqC command. This command has

the following format where “[data]” is the parameter value to be programmed at the “[index]”

location as described in Table 14: STM8SPLNB1 EEPROM parameters.

Note:

The special command E0 xx 0F FF FF protects the EEPROM data from any subsequent

write access (where xx is the corresponding DiSEqC slave address).

2.2.3

Command 0x0D

This command is dedicated for reading configuration parameters. This command has the

following format where the “[index]” is location to be read as shown in Table 14:

STM8SPLNB1 EEPROM parameters.

The format of the reply frame from slave has format according Table 7: Reply to command

0x0D format where “[data]” is the byte read from EEPROM.

Table 5. Command 0x0F format

frame

DiSEqC™

address

command

data1

data2

0xE0/0xE2

[device address]

0x0F

[index]

[data]

Table 6. Command 0x0D format

frame

DiSEqC™ address

command

data1

0xE2

[device address]

0x0D

[index]

Table 7. Reply to command 0x0D format

frame

data1

0xE4

[data]

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