RF65 Datasheet, PDF (70/72 Pages) List of Unclassifed Manufacturers – Low Power Integrated UHF Receiver With -120dBm High Sensitivity

RF65
9. Chip Revisions
Three distinct chip populations exist and can be identified as follows:
Table 27 Chip Identification
Chip
Register Value Lot Codes
Version @ address 0x10 (see Figure 3)
V2a
0x21
V2b
0x22
V2c
0x23
W0K976.00
W6A114.0A ¦W0N382.00
W0N386.00 ¦W0P051.00
W0S934.01 and all others
Comment
Limited supply
Limited supply
Running production
This document describes the behavior and characteristics of the RF65 V2c. Minor differences can be observed between
the three versions, and they are listed in the following sub sections.
9.1. RC Oscillator Calibration
On the RF65 V2a, RC calibration at power-up needs to be performed according to the following routine:
/////// RC CALIBRATION (Once at POR) ///////
SetRFMode(RF_STANDBY);
WriteRegister(0x57, 0x80);
WriteRegister(REG_OSC1, ReadRegister(REG_OSC1) | 0x80);
while (ReadRegister(REG_OSC1) & 0x40 == 0x00);
WriteRegister(REG_OSC1, ReadRegister(REG_OSC1) | 0x80);
while (ReadRegister(REG_OSC1) & 0x40 == 0x00);
WriteRegister(0x57, 0x00);
////////////////////////////////////////////
This is not required in the version V2b any more, where the calibration is fully automatic.
9.2. Listen Mode
9.2.1. Resolutions
On the RF65 V2a, the Listen mode resolutions were identical for the Idle phase and the Rx phase. They are now
independently configurable, adding flexibility in the setup of the Listen mode.
Figure 38. Listen Mode Resolutions, V2a
Figure 39. Listen Mode Resolution, V2b
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