Maxim Integrated MAX32600, Руководство пользователя

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MAX32600 User’s Guide Analog Front End 8.4 DAC
Note If Interpolation Mode is enabled (as discussed below), this parameter applies to the output rate of values after interpolation. The Rate Count
parameter is set by writing to the
DACn_RATE.rate_cnt field; the actual value of the Rate Count parameter is equal to ( rate_cnt + 2). For example,
to set the Rate Count to 20 clock cycles, the rate_cnt field should be set to 18.
• The optional Interpolation Mode parameter can be set to generate linearly interpolated data points between each two sample code values loaded into the
FIFO. For example, if the FIFO contains two data points, A1 and A2, and A2
>
A1, the output sample sequence generated will vary depending on interpolation
mode as follows:
– No interpolation :
*
A
1
*
A 2
– Interpolation 2-to-1 :
*
A 1
*
A 1 + ( A 2
−
A 1 )
×
1
2
*
A 2
– Interpolation 4-to-1 :
*
A 1
*
A 1
+ (
A 2
−
A 1
) ×
1
4
*
A 1
+ (
A 2
−
A 1
) ×
1
2
*
A 1
+ (
A 2
−
A 1
) ×
3
4
*
A 2
– Interpolation 8-to-1 :
*
A
1
*
A 1 + ( A 2
−
A 1 )
×
1
8
*
A
1 + (
A
2
−
A
1 )
×
2
8
*
A 1
+ (
A 2
−
A 1
)
×
3
8
*
A 1
+ (
A 2
−
A 1
) ×
4
8
*
A 1 + ( A 2
−
A 1 )
×
5
8
*
A 1 + ( A 2
−
A 1 )
×
6
8
*
A 1 + ( A 2
−
A 1 )
×
7
8
*
A 2
Rev.1.3 April 2015 Maxim Integrated Page 457