NXP Semiconductors freescale KV4 Series, Reference Manual

Page: 1051 / 1359

ENC_WTR field descriptions
Field Description
WDOG WDOG[15:0] is a binary representation of the number of clock cycles plus one that the watchdog timer
counts before timing out and optionally generating an interrupt.
41.4.4 Position Difference Counter Register (ENC_POSD)
Address: 4005_5000h base + 6h offset = 4005_5006h
Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Read
POSD
Write
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
ENC_POSD field descriptions
Field Description
POSD This read/write register contains the position change in value occurring between each read of the position
register. The value of the position difference counter register (POSD) can be used to calculate velocity.
The 16-bit position difference counter computes up or down on every count pulse. This counter acts as a
differentiator whose count value is proportional to the change in position since the last time the position
counter was read. When the position register, the position difference counter, or the revolution counter is
read, the position difference counter's contents are copied into the position difference hold register
(POSDH) and the position difference counter is cleared.
41.4.5 Position Difference Hold Register (ENC_POSDH)
Address: 4005_5000h base + 8h offset = 4005_5008h
Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Read POSDH
Write
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
ENC_POSDH field descriptions
Field Description
POSDH This read-only register contains a snapshot of the value of the POSD register. The value of the position
difference hold register (POSDH) can be used to calculate velocity.
Chapter 41 Quadrature Encoder/Decoder (ENC)
KV4x Reference Manual, Rev. 2, 02/2015
Freescale Semiconductor, Inc.
Preliminary
1051