5.6.4.17 DCDC3 Register (subaddress = 0x18) [reset = 0x8C]
DCDC3 is shown in Figure 5-52 and described in Table 5-24.
Return to Summary Table.
Note 1: This register is password protected. For more information, see Section 5.6.1.
Note 2: A 5-ms blanking time of the overvoltage and undervoltage monitoring occurs when a write is performed on the DCDC3 register.
NOTE
Power-up default may differ depending on RSEL value. See Section 5.3.1.13 for details.
Figure 5-52 DCDC3 Register
7 |
6 |
5 |
4 |
3 |
2 |
1 |
0 |
PFM |
RESERVED |
DCDC3 |
R/W-1b |
R-0b |
R/W-Ch |
Table 5-24 DCDC3 Register Field Descriptions
Bit |
Field |
Type |
Reset |
Description |
7 |
PFM |
R/W |
1b |
Pulse Frequency Modulation (PFM, also known as pulse-skip-mode) enable. PFM mode improves light-load efficiency. Actual PFM mode operation depends on load condition.
0b = Disabled (forced PWM)
1b = Enabled
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6 |
RESERVED |
R |
0b |
|
5-0 |
DCDC3 |
R/W, E2 |
Ch |
DCDC3 output voltage setting
0h = 0.900
1h = 0.925
2h = 0.950
3h = 0.975
4h = 1.000
5h = 1.025
6h = 1.050
7h = 1.075
8h = 1.100
9h = 1.125
Ah = 1.150
Bh = 1.175
Ch = 1.200
Dh = 1.225
Eh = 1.250
Fh = 1.275
10h = 1.300
11h = 1.325
12h = 1.350
13h = 1.375
14h = 1.400
15h = 1.425
16h = 1.450
17h = 1.475
18h = 1.500
19h = 1.525
1Ah = 1.550
1Bh = 1.600
1Ch = 1.650
1Dh = 1.700
1Eh = 1.750
1Fh = 1.800
20h = 1.850
21h = 1.900
22h = 1.950
23h = 2.000
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24h = 2.050
25h = 2.100
26h = 2.150
27h = 2.200
28h = 2.250
29h = 2.300
2Ah = 2.350
2Bh = 2.400
2Ch = 2.450
2Dh = 2.500
2Eh = 2.550
2Fh = 2.600
30h = 2.650
31h = 2.700
32h = 2.750
33h = 2.800
34h = 2.850
35h = 2.900
36h = 2.950
37h = 3.000
38h = 3.050
39h = 3.100
3Ah = 3.150
3Bh = 3.200
3Ch = 3.250
3Dh = 3.300
3Eh = 3.350
3Fh = 3.400
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