NXP Semiconductors MPC5644A, Reference Manual, Page: 1200 / 1735

Decimation Filter
MPC5644A Microcontroller Reference Manual, Rev. 6
1200 Freescale Semiconductor
26.4.4 PSI Register Description
This register is defined as 24-bit.
26.4.4.1 Decimation Filter Input/Output Buffers Register (DECFILTER_IOB)
The Input/Output Buffers Register is used by the PSI master block to access the Input and Output buffers
of the decimation filter. Writes to this register are interpreted as requests to the Decimation Filter to process
new sample data or to bypass timestamp data. Reads from this register frees the decimation filter output
buffer from filtered data or from bypass timestamp data.
Address: PS 0x0 Access: User read/write
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
R 0 0 0 0 OUT_TAG[3:0]
W
M_FLUSH
M_CTRL
[1:0]
INP_TAG[3:0]
Reset — — — — — — — — 0 0 0 0 0 0 0 0
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
R OUT_BUFF[15:0]
W INP_BUFF[15:0]
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Figure 26-15. Decimation Filter Interface Input/Output Buffers Register (DECFILTER_IOB)
Table 26-28. DECFILTER_IOB Register Field Descriptions
Field Description
0–7 Reserved, should be cleared.
8
M_FLUSH
Master block Flush request/control bit. Assertion of the M_FLUSH bit initializes the Decimation
Filter to a initial state, as defined in
Section 26.5.9, Flush command description ”. The sample or
timestamp data written with a flush request in the same IOB register write is processed normally
after the flush.
1 flush request
0 no flush request