rpc2a-433-64 Radiometrix Ltd, rpc2a-433-64 Datasheet - Page 26

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

A
- D
PPENDIX
The RPC2A as a control IC
Clock frequency
All timings within the RPC2A (except sleep) are determined by the clock frequency. The standard
frequency is 16.38MHz and all timings unless explicitly stated otherwise, assume this clock frequency.
f
clk
( i.e. 64kbit/s for Fclk=16.38MHz)
The data rate =
bit / s
256
Clock accuracy
The RPC2A uses synchronous data transmission and requires an accurate reference clock. In the worst
case , max. preamble and packet length, the allowable bit rate timing error between transmitter and
receiver is 0.2 bits in 1000 bits, i.e. +/-200ppm total or +/-100ppm at each end.
256
i.e. 16.38MHz crystal = 31.2 s PER BIT
BIT TIME
=
Hz
f
xtal
Accuracy, temp drifts MUST KEEP X-TAL +/- 100ppm of nominal
figure 18: RPC2A-000-SO & RPC2A-000-DIL outlines
Radiometrix Ltd, RPC2A
page 26