NXP Semiconductors MPC5644A Reference Manual page 716

Reaction Module (REACM)
Table 23-20. REACM_MWBK field descriptions (continued)
Field
17–22
THRESPT[5:0]
23–26
STPT[3:0]
27
28–31
HDOFFPT[3:0]
MM[2:0] Modulation type
00 Threshold/Threshold
01 Threshold/Hold-off
10
11
SM[1:0]
00
01 Timer time-out
10 Hold-off timer time-out Advance to the next modulation word when a Hold-off Timer
11 Threshold level
716
Threshold Pointer
The THRESPT[5:0] Threshold Pointer is the address of the Threshold Bank that holds
values to be used for ADC result comparisons in the modulation process. This pointer
has the resolution for a 16-bit data stored in the register described in
REACM Threshold Bank Register
Shared Timer Pointer
The STPT[3:0] Shared Timer Pointer field is the pointer for the Shared Timer Bank. The
Shared Timer is used as timer sequencer defining the advance of Modulation Words.
Reserved, should be cleared.
Hold-off Pointer
The HDOFFPT[3:0] field is the address of the Hold-off timer value in the Hold-off Timer
Bank that is used in the modulation cycle. Note that there are modulation sequences
that do not require hold-off measurement such as threshold/threshold modulations.
Table 23-21. configuration: Modulation modes
MM[2:0]
Modulation occurs between two threshold levels defined by
THRESPT upper level threshold pointer and THRESPT +1 which
corresponds to a lower level threshold pointer. Output ON state is
defined by HOD and Output OFF state is defined by LOD.
Modulation occurs between an upper level threshold defined by
THRESPT and a Hold-off time is initiated after that level is
achieved which set channel outputs to an off state.
Reserved
Reserved
Table 23-22. configuration: Sequencer modes
SM[1:0]
Event
No advance Current modulation word is used, no advance is performed on any
event. No timer is activated by this modulation word.
Advance to the next modulation word when a Timer time-out event
is detected. The Timer is activated when the modulation word is
accessed by the channel.
time-out event is detected. The Hold-off timer is activated when
the modulation word is accessed by the channel.
Advance to the next modulation word when a threshold level is
achieved achieved. The threshold level is defined by the THRESPT pointer.
See section
threshold level.
MPC5644A Microcontroller Reference Manual, Rev. 6
Description
(REACM_THBK).
Modulation description
—
—
Event description
Section 23.10.1, Advancing modulation phase on a
Section 23.3.12,
Freescale Semiconductor