Microhard Systems P900 - CRC Check on Diag Port; Binary Encryption Key; Hop Zone; Secondary Hop Zone

© Microhard Systems Inc. Confidential 93
6.0 Register/Command Reference
Values (0-10)
S181 (PP/PMP) Secondary Hop Zone
0 - Use entire ISM band
Used on PP and PMP Repeaters, S181 will allow the use of hopping zones to
restrict the secondary hopping pattern to specific segments of the 900 MHz ISM
band. Any downstream units connected to this will need to have their S180
(Primary Hop Zone) set to same value as the Secondary Hop Zone of the
Repeater they are connected to.
The default is to populate the hopping pattern/table using channels or
frequencies from the entire 900MHz ISM band. Additional zones can be seen
by displaying help for the S181 register.
Values (0-10)
S180 Hop Zone
0 - Use entire ISM band
S180 will allow the use of hopping zones to restrict the hopping table to specific
segments of the 900 MHz ISM band. The default is to populate the hopping
pattern/table using channels or frequencies from the entire 900MHz ISM band.
Additional zones can be seen by displaying help for the S180 register.
Values (selection)
S163 CRC check on diag port
0 - Disable
1 - Enable (default)
Enables CRC16 checking of received data on local diagnostic port. Note that
even if disabled, the incoming data must have two dummy bytes transmitted in
place of crc bytes. Disabling CRC check is only advisable during
troubleshooting of the user’s diagnostic requests.
Values (Binary Bytes)
S177 Binary Encryption Key
16 - 32 Bytes (AES type
dependant)
When using AES encryption, S177 can be used to define the encryption key in
binary. The type of AES used defines the minimum number of binary bytes that
need to be entered. See S159 for more information.
Values
S183 (PP/PMP) DCD Pulse Period
5
The period of DCD pulses on synchronized slaves in &C3 mode. Minimum
value = 1, Max value = number of channels in a hop pattern minus one. The
default is 5.
S183 = 1 - DCD will pulse every hop interval, if S183 = 3 - every third, etc. The
counter starts at hop index 0. It is used in some applications to generate
common synchronization on many slaves. With the default setting of 5 and the
hop interval of 20ms, each slave will synchronously generate a pulse of
approximately 3ms every 100ms.