Freescale Semiconductor MPC5553, Reference Manual

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MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
Freescale Semiconductor 19-19
6 CFINVn CFIFO invalidate bit n. Causes the eQADC to invalidate all entries of CFIFOn. Writing a 1
to CFINVn will reset the value of CFCTRn in the EQADC_FISR register (refer to
Section 19.3.2.8, “eQADC FIFO and Interrupt Status Registers 0–5 (EQADC_FISRn) .”
Writing a 1 to CFINVn also resets the push next data pointer, transfer next data pointer to
the first entry of CFIFOn in
Figure 19-35 . CFINVn always is read as 0. Writing a 0 has no
effect.
0 No effect.
1 Invalidate all of the entries in the corresponding CFIFO.
Note: Writing CFINVn only invalidates commands stored in CFIFOn; previously
transferred commands that are waiting for execution, that is commands stored in the ADC
command buffers, will still be executed, and results generated by them will be stored in the
appropriate RFIFO.
Note: CFINVn must not be written unless the MODEn is configured to disabled, and
CFIFO status is IDLE.
7 — Reserved.
8–11 MODEn
[0:3]
CFIFO operation mode n. Selects the CFIFO operation mode for CFIFOn. Refer to
Section 19.4.3.5, “CFIFO Scan Trigger Modes
,”
for more information on CFIFO trigger
mode.
Note: If MODEn is not disabled, it must not be changed to any other mode besides
disabled. If MODEn is disabled and the CFIFO status is IDLE, MODEn can be changed to
any other mode.
12–15 — Reserved.
Table 19-10. CFIFO Operation Mode Table
MODEn[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
0b0100 Falling edge external trigger, single scan
0b0101 Rising edge external trigger, single scan
0b0110 Falling or rising edge external trigger, single scan
0b0111–0b1000 Reserved
0b1001 Software trigger, continuous scan
0b1010 Low level gated external trigger, continuous scan
0b1011 High level gated external trigger, continuous scan
0b1100 Falling edge external trigger, continuous scan
0b1101 Rising edge external trigger, continuous scan
0b1110 Falling or rising edge external trigger, continuous scan
0b1111 Reserved
Table 19-9. EQADC_CFCRn Field Descriptions (Continued)
Bits Name Description