Enhanced Queued Analog-to-Digital Converter (eQADC)
MPC5565 Microcontroller Reference Manual, Rev. 1.0
Freescale Semiconductor
18-19
Address: EQAD 0x050 (EQADC_CFCR0)
EQAD 0x052 (EQADC_CFCR1)
EQAD 0x054 (EQADC_CFCR2)
EQAD 0x056 (EQADC_CFCR3)
EQAD 0x058 (EQADC_CFCR4);
EQAD 0x05A (EQADC_CFCR5)
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
0
0
MODE
n
0
0
0
0
W
SSE
n
CFINV
n
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 18-7. eQADC CFIFO Control Registers (EQADC_CFCR
n
)
Table 18-9. EQADC_CFCR
n
Field Descriptions
Field
Description
0–4
Reserved.
5
SSE
n
CFIFO single-scan enable bit
n
. Used to set the SSS
n
Section 18.3.2.8, “eQADC FIFO and
Interrupt Status Registers 0–5 (EQADC_FISRn)
.” Writing a 1 to SSE
n
sets the SSS
n
if the CFIFO is in single-scan
mode. When SSS
n
is already asserted, writing a 1 to SSE
n
has no effect. If the CFIFO is in continuous-scan mode
or is disabled, writing a 1 to SSE
n
does not set SSS
n
. Writing a 0 to SSE
n
has no effect. SSE
n
always is read as 0.
0 No effect.
1 Set the SSS
n
bit.
6
CFINV
n
CFIFO invalidate bit
n
. Causes the eQADC to invalidate all entries of CFIFO
n
. Writing a 1 to CFINV
n
resets the value
of CFCTR
n
in the EQADC_FISR register (refer to
Section 18.3.2.8, “eQADC FIFO and Interrupt Status Registers
.” Writing a 1 to CFINV
n
also resets the push next data pointer, transfer next data pointer to the
first entry of CFIFO
n
in
. Reading CFINV
n
always returns a 0. Writing a 0 has no effect.
0 No effect.
1 Invalidate all of the entries in the corresponding CFIFO.
Note:
Writing CFINV
n
only invalidates commands stored in CFIFO
n
; previously transferred commands that are
waiting for execution (commands stored in the ADC command buffers) are executed, and the results are stored
in the RFIFO.
Note:
Do not write to CFINV
n
unless MODE
n
is disabled, and CFIFO status is IDLE.
7
Reserved.
8–11
MODE
n
[0:3]
CFIFO operation mode
n
. Selects the CFIFO operation mode for CFIFO
n
. Refer to
for more information on CFIFO trigger mode.
Note:
If MODE
n
is not disabled, it must not be changed to any other mode besides disabled. If MODE
n
is disabled
and the CFIFO status is IDLE, MODE
n
can be changed to any other mode.
12–15
Reserved.
Table 18-10. CFIFO Operation Mode Table
MODE
n
[0:3]
CFIFO Operation Mode
0b0000
Disabled
0b0001
Software trigger, single scan
0b0010
Low level gated external trigger, single scan
0b0011
High level gated external trigger, single scan
Содержание MPC5565
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