SIG61 Datasheet, PDF (8/15 Pages) Yamar Electronics Ltd. – Smart Slave for DC-BUS Powerline Network

Preliminary and proprietary Information of YAMAR Electronics Ltd. Subject to change without notice.
4 DEVICE OPERATION
The following paragraph describes the operation of the SIG61 device.
4.1 Protocol
The device operation is controlled via 5 types of commands:
Write command - Upon receiving a Write command with the SIG61 specific ID, the device shall output
the data byte content as indicated by the command to its Output pins.
Read command - Upon receiving a Read massage with the SIG61 specific ID, the device shall
respond by sending a message containing the status of its Input pins (followed by an appropriate
checksum).
Read-Change command - When receiving a Read-Change massage with the SIG61 specific ID, the
device shall respond to the command by indicating if a pulse upon detecting the first change on its input
pins. The response message shall contain the new status of the input pins followed by an appropriate
checksum.
Sleep command - Upon receiving a Sleep command, the device shall enter a low power-consumption
(sleep) mode. A wakeup message generated by the master, or by any of the slaves, wakes up all the
devices on the network. This is a global message targeting all the slaves in the network.
Change-Frequency command - Upon receiving Change-Frequency command, the device shall switch
from its current operational frequency to the other. This command is a global command targeting all the
slaves in the network.
4.1.1 Command structure
The structure of the five types of commands is detailed below.
Command type 1: Write command.
The Write command consists of 5 bytes: sync break, sync field, Identifier, data and checksum.
The identifier byte begins with the device four ID bits, followed by 00 bits and 2 protection bits.
Upon receiving a write command, if checksum and protection bits calculations are successful, the data
byte content is transferred to the corresponding output pins.
Sync break:
Sync break length is at least 13 bit times with compliance to Lin protocol.
Protection bits calculation:
P0 = (Identifier [0]) XOR (Identifier [1]) XOR (Identifier [2]) XOR (Identifier [4])
P1 = ~ ((Identifier [1]) XOR (Identifier [3]) XOR (Identifier [4]) XOR (Identifier [5]))
Checksum calculation:
The checksum is an inverted 8 bit sum of the Identifier and Data byte including (own) carry:
Checksum = ~ ( Identifier Byte + Data Byte + Carry)
© 2010 Yamar Electronics Ltd.
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DS-SIG61 R0.932