RF65 datasheet(70/72 Pages) ETC2

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Page 70

RF65

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9. Chip Revisions

Three distinct chip populations exist and can be identified as follows:

Table 27 Chip Identification

Chip

Version

@ address 0x10

Lot Codes

(see Figure 3)

Comment

V2a

0x21

W0K976.00

Limited supply

V2b

0x22

W6A114.0A ¦W0N382.00

W0N386.00 ¦W0P051.00

Limited supply

V2c

0x23

W0S934.01 and all others

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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