NXP Semiconductors UM11227 - Tab. 102. RFM Control 0 Register (RFCR0) (Address $1830); RFM Register Descriptions; 1 RFM Control 0 Register (RFCR0)

NXP Semiconductors
UM11227
NTM88 family of tire pressure monitor sensors
UM11227 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2020. All rights reserved.
User manual Rev. 6 — 24 April 2020
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• The calibration takes approximately 5 μs.
The state machine of the calibration is shown in Figure 39.
Count the number of
cycles of the VCO
Compare
VCOcount and Targetedcount
VCOband = maxband/2
Bestband = maxband/2
Difference = maxband/4
VCOband = VCOband - Difference
Difference = Difference/2
VCOband = VCOband + Difference
Bestband = VCOband
VCOband = VCOband - Difference
Difference = 1?
no
yes
Bestband is first best band found
or the closest band found
· Maxband is the number
of sub-band of the VCO
· Bestband is the band which
is going to be chosen
· Difference is an internal variable.
VCOcount = Targetedcount
VCOcount < TargetedcountVCOcount > Targetedcount
aaa-028040
Figure 39. VCO calibration state machine
10.16.11 RFM register descriptions
10.16.11.1 RFM control 0 register (RFCR0)
Table 102. RFM control 0 register (RFCR0) (address $1830)
Bit 7 6 5 4 3 2 1 0
R
W
BPS7 BPS6 BPS5 BPS4 BPS3 BPS2 BPS1 BPS0
Reset ($34) 0 0 1 1 0 1 0 0