RPC-UHF RADIOMETRIX [Radiometrix Ltd], RPC-UHF Datasheet - Page 11

• Manufacturer Part Number: RPC-UHF
• Description: Radio Packet Controller
• Manufacturer: RADIOMETRIX [Radiometrix Ltd]

3.0 RPC’
S
S
WITCHES
S
is memory location 00h in RAM, it contains 8 flags which are used to determine the RPC's
WITCHES
operation. On RPC reset, power-up or watchdog Time-Out it is loaded from location 08h (in EEPROM).
The default value is 00 hex - this is all functions deselected.
figure 12: Switches
3.1 PS0 & PS1 - P
S
OWER
AVING
The RPC has 4 levels of power saving selected by PS0 & PS1 in SWITCHES. Power saving is achieved
by shutting down the Transceiver and the RPC for a period of time (O
-T
) when the RPC is in the
FF
IME
Idle state (i.e. nothing happening). During the O
period current is reduced to the device leakage of
FF
<50 µA typ. The RPC will still respond immediately to a Host TX Request but cannot receive radio
signals. After the programmed O
-T
the RPC will wake itself up, turn the receiver on and listen
FF
IME
for valid preamble. ON time = PWR->RX (EEPROM address 05h) + 1ms = 4ms (using RPC Default
values) If preamble is found the RPC will stay ON and decode the packet, if not
the RPC will shut down for another OFF time period.
Also see - WAKE-UP (address 02h of EEPROM) and paragraph 2.2.2 .
Radiometrix Ltd, RPC
page 11