Davref_Setup (0X0B00 0164) - NEC VR4181 mPD30181 User Manual

15.2.3 DAVREF_SETUP (0x0B00 0164)

Bit 15
Name DAVREF15
R/W R/W
RTCRST 0
Other resets 0
Bit 7
Name DAVREF7
R/W R/W
RTCRST 0
Other resets 0
Bit Name
15 to 0 DAVREF(15:0)
This register is used to select a Vref setup time for the D/A converter.
The following expression is used to calculate the value set to this register.
DAVREF(15:0) = 5 µ s × PCLK frequency
For example, if the internal peripheral clock (PCLK) frequency is 25 MHz, the DAVREF(15:0) bits should be set to
as follows;
DAVREF(15:0) = 5 × 10
CHAPTER 15 AUDIO INTERFACE UNIT (AIU)
14 13
DAVREF14 DAVREF13 DAVREF12
R/W R/W
0 0
0 0
6 5
DAVREF6 DAVREF5
R/W R/W
1 1
1 1
D/A converter Vref setup time.
−
6 × 25 × 10 6
= 0x007D
User's Manual U14272EJ3V0UM
12 11
DAVREF11 DAVREF10
R/W R/W
0 0
0 0
4 3
DAVREF4 DAVREF3 DAVREF2
R/W R/W
1 1
1 1
Function
10 9
DAVREF9 DAVREF8
R/W R/W R/W
0 0
0 0
2 1
DAVREF1 DAVREF0
R/W R/W R/W
1 0
1 0
8
0
0
0
1
1
305