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Digital-to-Analog Converter (DAC)
3-14
Example 3–2. 10-kHz Sampling Rate
10 kHz Nominal Synthesis Rate
32.768 kHz Oscillator Reference
DAC
Precision
IntGenCtrl
PDMCD
Bit
Over-
Sampling
Factor
ClkSpdCtrl
PLLM
Register
Value
(hex)
Master
Clock
Rate
(MHz)
PDM
RATE
(MHZ)
CPU
Clock
Rate
(MHz)
Output
Sampling
Rate
(kHz)
Number of
Instructs
Between
DAC
Interrupts
Number of
Instructs
Between
10 kHz
Interrupts
8 bits 1 1x 0x 13 2.62 2.62 1.31 10.24 128 128
2x 0x 26 5.11 5.11 2.56 19.97 128 256
4x 0x 4D 10.22 10.22 5.11 39.94 128 512
8x 0x 9B 20.45 20.45 10.22 79.87 128 1024
0
1x 0x 26 5.11 2.56 2.56 9.98 256 256
2x 0x 4D 10.22 5.11 5.11 19.97 256 512
4x 0x 9B 20.45 10.22 10.22 39.94 256 1024
9 bits
1 1x 0x 26 5.11 5.11 2.56 9.98 256 256
2x 0x 4D 10.22 10.22 5.11 19.97 256 512
4x 0x 9B 20.45 20.45 10.22 39.94 256 1024
0
1x 0x 4D 10.22 5.11 5.11 9.98 512 512
2x 0x 9B 20.45 10.22 10.22 19.97 512 1024
10 bits
“1” 1x 0x 4D 10.22 10.22 5.11 9.98 512 512
2x 0x 9B 20.45 20.45 10.22 19.97 512 1024
“0” 1x 0x 9B 20.45 10.22 10.22 9.98 1024 1024