RFW-D100 Vishay, RFW-D100 Datasheet - Page 8

• Manufacturer Part Number: RFW-D100
• Manufacturer: Vishay

Specifications of RFW-D100

• Operating Temperature (min): 0C
• Operating Temperature (max): 70C
• Operating Temperature Classification: Commercial
• Package Type: LQFP
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 3.6V
• Lead Free Status / Rohs Status: Supplier Unconfirmed

RFW-D100
Vishay RFWaves
RESET
A reset is achieved by holding the RST pin high for at
least 10 oscillator cycles. The reset initializes the
RFW-D100 and all of its registers to their initial state.
To ensure good power up, a reset should be given to
the RFW-D100 after power up.
POWER SAVING MODES
The RFW-D100 was designed to work in similar
working modes as the typical MCU.
These modes enable the system to save power when
the RFW-D100 is not in use.
POWER DOWN MODE
The MCU is able to halt all activity in the RFW-D100 by
stopping its clock. This enables the MCU to reduce the
power consumption of the RFW-D100 to a minimum.
All registers and FIFOs retain their values when the
RFW-D100 is in power-down mode.
In
IDLE_MODE=‘1’, and IDLE_RST=‘0’.
If the MCU wants to put the RFW-D100 into power-
down mode, it should do the following:
1. IDLE_MODE = ‘0’.
2. WAIT 10 µs.
3. POWER_DOWN = ‘0’.
4. POWER_DOWN pin should be kept low as long as
5. IDLE_MODE = ‘1’ – So this input will be compatible
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8
OSCILLATOR CHARACTERISTICS
the RFW-D100 is in power down mode.
with its internal pull up to lower power consumption
in power down mode.
working
mode:
POWER_DOWN=‘1’,
For more information please contact: [e-mail]
RFW-D100
Figure 4. RFW-D100’s Oscillator Topology
Inside
C1
(PIN 44)
OSC_I
Crystal
Rfeb
If the MCU wants to wake the RFW-D100 from
power-down mode back to working mode, it should do
the following:
1. IDLE_RST = ‘1’.
2. IDLE_MODE = ‘0’.
3. POWER_DOWN = ‘1’.
4. WAIT Oscillator Wakeup Time until oscillator is
5. IDLE_RST = ‘0’.
6. IDLE_MODE = ‘1’.
7. Exit ‘Low Mode’.
The wakeup time of the RFW-D100 from power-down
mode to fully operating mode is depended on the
crystal type. Typically it should be a few milliseconds.
Since the RFW-D100 retains all the register values in
power-down mode, special attention should be paid to
the register values before it enters power-down. For
example, the MCU should check that the RFW-D100 is
not in the middle of transmitting or receiving a packet.
The RFACTIVE should be set low to shut down the
RFW122, before entering power down mode.
Power consumption in power down mode is < 1 µA, if
RC_OSC is disabled.
Power consumption in power down mode is < 10 µA, if
RC_OSC is enabled.
OSC_IO
(PIN 43)
stable.
Rd
C2
19313
Document Number 84675
Rev. 1.1, 22-Jan-07