DACx_STATCTRL field descriptions (continued)
Field
Description
FIFO mode, it is the FIFO read pointer. It is writable in FIFO mode. User can configure it to same address
to reset FIFO as empty.
27–24
DACBFUP
DAC Buffer Upper Limit
In FIFO mode it is the FIFO write pointer. User cannot set Buffer Up limit in FIFO mode. In Normal mode
its reset value is MAX. When the module is configured to FIFO mode, this register becomes Write_Pointer.
It is writable and user can configure it to the same address to reset FIFO as empty.
NOTE: After FIFO mode enabled, user needs to reset FIFO by writing the pointer to the same address
with Read_Pointer.
23
DMAEN
DMA Enable Select
0
DMA is disabled.
1
DMA is enabled. When DMA is enabled, the DMA request will be generated by original interrupts. The
interrupts will not be presented on this module at the same time.
22
BFOUTEN
DAC output buffer enable
0
Disable DAC output buffer
1
Enable DAC output buffer
21
TESTOUTEN
DAC test output enable
0
Disable DAC test output
1
Enable DAC test output
20–19
DACBFWM
DAC Buffer Watermark Select
In normal mode it controls when DACBFWMF is set. When the DAC buffer read pointer reaches the word
defined by this field, which is 1–4 words away from the upper limit (DACBUP), DACBFWMF is set. This
allows user configuration of the watermark interrupt. In FIFO mode, it is FIFO watermark select field.
00
In normal mode, 1 word . In FIFO mode, 2 or less than 2 data remaining in FIFO will set watermark
status bit.
01
In normal mode, 2 words . In FIFO mode, Max/4 or less than Max/4 data remaining in FIFO will set
watermark status bit.
10
In normal mode, 3 words . In FIFO mode, Max/2 or less than Max/2 data remaining in FIFO will set
watermark status bit.
11
In normal mode, 4 words . In FIFO mode, Max-2 or less than Max-2 data remaining in FIFO will set
watermark status bit.
NOTE: Max is equal to the FIFO depth.
18–17
DACBFMD
DAC Buffer Work Mode Select
00
Normal mode
01
Swing mode
10
One-Time Scan mode
11
FIFO mode
16
DACBFEN
DAC Buffer Enable
0
Buffer read pointer is disabled. The converted data is always the first word of the buffer.
1
Buffer read pointer is enabled. The converted data is the word that the read pointer points to. It means
converted data can be from any word of the buffer.
Table continues on the next page...
Memory map/register definition
Kinetis KE1xF Sub-Family Reference Manual, Rev. 4, 06/2019
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NXP Semiconductors
Содержание KE1xF Series
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