Rainbow Electronics RFM01 - Manual (Page 8)

RFM01
Version: 1.2 Date: 10/17/2008
Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: [email protected] http://www.hoperf.com
RF01 And RFM01 Product Change Notification
Prior Product Revision #: J
New Product Revision #: J1
FUNCTION / ISSUE IMPLEMENTED CHANGES
1 Wake Up Timer calibration
The control of the wake up timer’s
internal calibration has been changed to
prevent an unnecessary Xosc on state
2 Wake Up Timer startup
The Wake Up Timer has been modified
to provide faster start up.
3
Unlocking of the PLL in 315 MHz
band
The reference clock duty cycle was
tuned closer to 50%, which eliminated
the 315 MHz PLL lock issues.
4
Unknown VDI state when the receiver
chain is switched off
VDI is set to logic low when receiver
chain is switched off
5
When the device wakes from sleep
mode, no clock is available on the
CLK (PIN 8).
The modifications eliminated this
problem.
6
If the µC CLK output was used in
LPDM mode, the internal logic control
did not switch off the crystal oscillator
during the idle period of the LPDM
cycle.
The modifications eliminated this
oblem.
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