MAC7200 datasheet(833/976 Pages) FREESCALE

833 / 976 page

Memory Map and Register Definition

MAC7200 Microcontroller Family Reference Manual, Rev. 2

Freescale Semiconductor

755

The CQNF, CQF and CQE flags are dynamic, which means that their values can change without clearing

them as they represent current states. The flags CRL, ETO, CP and CC remain set after they got set once.

They must be cleared via software.

NOTE

The flags can not be cleared during a low-power mode. Fur further details

about low-power modes please see Section 33.11.4, “Low Power /

Operating Modes”.

Table 33-14. ATDFLAG Field Descriptions

Field

Description

Reserved, should be cleared.

CQNF

Command queue not full flag. Indicates that the queue for command words is not full and can therefore store another

command word. The conversion, currently being executed, if any, is not affected by a write.

0 Command queue is full

1 Command queue is not full

CQF

Command queue full flag. Indicates that the queue for command words is full. Note that when CQF is set, any write

access to the command word register (ATDCW) will overwrite the command that was in the command register before.

The conversion currently executed is not affected by a write.

0 Command queue is not full

1 Command queue is full

CQE

Command queue empty flag. Indicates that the queue for command words is empty. More command words can be

stored. It also indicates that no conversion is currently running.

0 Command queue not empty

1 Command queue is empty

CRL

Conversion result lost flag. Indicates that a conversion result was overwritten before it could be read.

0 Conversion results have always been stored/read in time

1 A conversion result was overwritten

Note: CRL is useful to detect possible problems with the availability of the DMA channels. Therefore it is useful to

enable this interrupt (CRLIE = 1) during the software debugging phase.

ETO

External trigger overrun flag. Will indicate that additional edges at the trigger input have been recognized but no

triggers were expected as the ATD is currently executing a conversion. If level-sensitive triggering is set, ETO will

never be set.

0 No additional edges have been detected

1 One or more additional edges have been detected. If ETOIE is ‘1’ an interrupt will be generated.

Note: Additional edges can not be detected while module is in low-power mode or disabled.

Conversion paused flag. Indicates that a conversion with CWCM = 01 (convert then pause) has finished. When such

a conversion finishes no new command word is executed until the MCU writes a new command word to the ATDCW

0 No conversion finished with CWCM = “convert then pause”

1 A conversion with CWCM = “convert then pause” finished

Conversion complete flag. Indicates the end of a conversion. When a conversion finishes, this flag will be set (and

remain set) if the CWGI bit of the command word is also set.

0 No conversion with CWGI = 1 finished

1 A conversion with CWGI = 1 finished

MAC7200 Datasheet(PDF) 833 Page - Freescale Semiconductor, Inc

MAC7200 Datasheet(HTML) 833 Page - Freescale Semiconductor, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL