NXP Semiconductors K32 L2A Series, Reference Manual, Page: 392 / 1379

18.4.6 DAC Control Register 2 (DACx_C2)
Address: 4006_A000h base + 23h offset = 4006_A023h
Bit 7 6 5 4 3 2 1 0
Read
DACBFRP DACBFUP
Write
Reset
0 0 0 0 1 1 1 1
DACx_C2 field descriptions
Field Description
7–4
DACBFRP
DAC Buffer Read Pointer
Keeps the current value of the buffer read pointer.
DACBFUP DAC Buffer Upper Limit
Selects the upper limit of the DAC buffer. The buffer read pointer cannot exceed it.
18.5 Functional description
The 12-bit DAC module can select one of the two reference inputs—DACREF_1 and
DACREF_2 as the DAC reference voltage, V
in
by C0 [DACRFS]. See the chip-specific
DAC information to determine the source options for DACREF_1 and DACREF_2.
When the DAC is enabled, it converts the data in DACDAT0[11:0] or the data from the
DAC data buffer to a stepped analog output voltage. The output voltage range is from V
in
to V
in
∕4096, and the step is V
in
∕4096.
18.5.1 DAC data buffer operation
When the DAC is enabled and the buffer is not enabled, the DAC module always
converts the data in DAT0 to the analog output voltage.
When both the DAC and the buffer are enabled, the DAC converts the data in the data
buffer to analog output voltage. The data buffer read pointer advances to the next word
whenever a hardware or software trigger event occurs.
The data buffer can be configured to operate in Normal mode, Swing mode, One-Time
Scan mode. When the buffer operation is switched from one mode to another, the read
pointer does not change. The read pointer can be set to any value between 0 and
C2[DACBFUP] by writing C2[DACBFRP].
Functional description
K32 L2A Reference Manual, Rev. 2, 01/2020
392 NXP Semiconductors