rpc2a-433-64 Radiometrix Ltd, rpc2a-433-64 Datasheet - Page 9

• Manufacturer Part Number: rpc2a-433-64
• Description: Uhf Radio Packet Controller
• Manufacturer: Radiometrix Ltd

Data packets are sent to / received from remote RPC2A’s. They begin with a control byte with bit 7
cleared and may be of variable length and contain up to 27 bytes of user determined data.
figure 9: Control byte for data packet
The remainder of the bytes in the data packet are of the users determination.
The packet would usually be made up of a number of fields consisting of some
but not necessarily all of the following :-
2.2.3 RPC2A M
The RPC2A’s EEPROM memory can be accessed by setting bit 7 in the control byte. Bit 6 (R/W flag)
defines a memory read or write. The bits left define the address.
Radiometrix Ltd, RPC2A
figure 10: RPC2A memory access
1
7
7
ENDING AND RECEIVING
1
Source address / ID
Destination address / ID
System ID
Packet count
Encryption / Scrambler control
Additional error check codes ( The RPC2A performs it's own error checks)
Routing information ( for repeaters)
Link control codes (connect/disconnect/ACK/NAK etc.)
Data field
7
Read from memory
0
0
6
6
Address (6 bit)
Address (6 bit)
EMORY
Data byte
A
RPC2A
CCESS
0
ATA
Control Byte
0
0
ACKETS
Write to memory
Data Byte
RPC2A
Control Byte
page 9