Enhanced Queued Analog-to-Digital Converter (eQADC)
MPC5510 Microcontroller Family Reference Manual, Rev. 1
31-10
Freescale Semiconductor
Preliminary
31.3.3.2
eQADC Null Message Send Format Register (EQADC_NMSFR)
The EQADC_NMSFR defines the format of the null message sent to the external device.
NOTE
The eQADC null message send format register affects only how the eQADC
sends a null message, but it has no control on how the eQADC detects a null
message on receiving data. The eQADC detects a null message by decoding
the MESSAGE_TAG field on the receive data. Refer to
for
more information on the MESSAGE_TAG field.
31.3.3.3
eQADC External Trigger Digital Filter Register (EQADC_ETDFR)
The EQADC_ETDFR is used to set the minimum time a signal must be held in a logic state on the CFIFO
triggers inputs to be recognized as an edge or level gated trigger. The digital filter length field specifies the
minimum number of system clocks that the digital filter counter must count to recognize a logic state
change.
Table 31-2. EQADC_MCR Field Descriptions
Field
Description
bits 0–29
Reserved.
DBG
Debug Enable. Defines the eQADC response to a debug mode entry request.
00 Do not enter debug mode
01 Reserved
10 Enter debug mode. If the eQADC SSI is enabled, FCK stops while the eQADC is in debug mode.
11 Enter debug mode. If the eQADC SSI is enabled, FCK is free running while the eQADC is in debug mode
Offset: Base + 0x0008
Access: Read/Write
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
0
0
0
0
0
0
NMF
W
Reset
0
0
0
0
0
0
0
0
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
NMF
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 31-3. eQADC Null Message Send Format Register (EQADC_NMSFR)
Table 31-3. EQADC_NMSFR Field Descriptions
Field
Description
bits 0–5
Reserved.
NMF
Null Message Format. Contains the programmable null message send value for the eQADC.