L9908 datasheet(99/153 Pages) STMICROELECTRONICS

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PVF_TH_CFG

Description

VPVF_TH_H = VDH*0.6

VPVF_TH_L = VDH*0.4

Table 93. PVF electrical characteristics

Symbol

Parameter

Min Typ Max Unit Notes

PPVF_th_acc

PVF thresholds accuracy

-6.5

6.5

PPVF_th_match

PVF thresholds matching

-8

PPVF_htol_dly

PVF high to low propagation delay

200

PPVF_ltoh_dly

PVF low to high propagation delay

200

PPVF_dly_match

PVF propagation delay matching (phase vs. phase)

PPVF_htol_ltoh_dly_match

PVF propagation delay matching (single phase - rise to fall)

Note:

All parameters are guaranteed, and tested, in the voltage ranges reported above in Table 5 unless otherwise

specified. Where not specified the parametrical operating range equals the functional operating range.

Figure 74. Phase voltage feedback behavior

The state of PVF comparators is echoed into dedicated SPI readable registers PVFn_ECHO, in the register

GEN_STATUS3.

To save pin-count the phase comparator outputs are multiplexed to one single output pin CSO3/PVM.

The selection of which phase comparators output can be configured by means of a dedicated SPI bit set as

follows:

L9908

Phase Voltage Feedback (PVF)

DS13546 - Rev 3

page 99/153

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