NXP Semiconductors UM11227 - 4 LF Control 4 Register (LFCTL4)

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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Carrier detect Data detect
LFCDTM[3:0] Clock Cycles ~ Time µs Clock Cycles ~ Time µs
1 0 0 1 16 128 16 128
1 0 1 0 32 256 32 256
1 0 1 1 64 512 64 512
1 1 0 0 128 1024 128 1024
1 1 0 1 256 2048 256 2048
1 1 1 0 512 4096 512 4096
1 1 1 1 1024 8192 1024 8192
10.15.17.4 LF control 4 register (LFCTL4)
Table 81. LF control 4 register (LFCTL4) (address $0023)
Bit 7 6 5 4 3 2 1 0
R
W
LFDRIE LFERIE LFCDIE LFIDIE DCEN VALEN TIMOUT1 TIMOUT0
Reset U U U U U U U U
POR ($0F) 0 0 0 0 1 1 1 1
LFR Soft
Reset ($0F)
0 0 0 0 1 1 1 1
Table 82. LFCTL4 register field descriptions
Field Description
7
LFDRIE
LFDRIE – LFR Data Register Full Interrupt Enable
This read/write bit enables interrupts to be requested when the LFR data register is full.
0 = LFDRF interrupts disabled. Use software polling; Result of power on or LFR reset. Existing state
remains after all other reset types.
1 = LFR Data Register Full interrupts enabled. If LFDRIE = 1, then interrupt is requested when LFDRF = 1.
6
LFERIE
LFERIE – LFR Error Interrupt Enable
This read/write bit enables interrupts to be requested when the LFR detects an error in reception of a non-
Manchester encoded bit time following the SYNC time, or if when a sampling error is detected, or when the
ID is not matched.
0 = LFERF interrupts disabled. Use software polling; Result of power on or LFR reset. Existing state
remains after all other reset types.
1 = LFERF interrupts are enabled. If LFERIE is set, then an interrupt is requested when LFERF = 1.
5
LFCDIE
LFCDIE - LFR Carrier Detect Interrupt Enable
This read/write bit enables interrupts to be requested when the LFCD flag rises.
0 = LFCDF interrupts disabled. Use software polling; Result of power on or LFR reset. Existing state
remains after all other reset types.
1 = LFCDF interrupts are enabled. If LFCDIE is set, then an interrupt is requested when LFCDF = 1.