AS3709 datasheet(53/74 Pages) AMSCO

53 / 74 page

ams Datasheet, Confidential: 2013-Aug [1-02]

AS3709 – 53

Reg i st er Description

Figure 72:

SD_control2 Register (Address 31h)

Addr: 31h

SD_control2

Bit

Bit Name

Default

Access

Bit Description

7:6

sd_dvm_select

'b00

Apply DVM counter to the following DCDC converter

0 : Select SD1 for DVM

1 : Select SD2 for DVM

2 : Select SD3 for DVM

3 : Select SD5 for DVM

5:4

dvm_time

'b00

Time steps of DVM voltage change of selected step

down, if voltage of step Down is changed during

operation (sdx_vsel) voltage is decreased/increased

by single steps 12.5mV

0 : 0 μsec, immediate change (no DVM)

1 : 4 μsec time delay between steps

2 : 8 μsec time delay between steps

3 : 16 μsec time delay between steps

3sd4_fsel

Selects between high and low frequency range

0 : 2 or 3MHz frequency (selectable by sd4_frequ)

1 : 3 or 4MHz frequency (selectable by sd4_frequ)

2sd3_fsel

Selects between high and low frequency range

0 : 2 or 3MHz frequency (selectable by sd3_frequ)

1 : 3 or 4MHz frequency (selectable by sd3_frequ)

1sd2_fsel

Selects between high and low frequency range

0 : 2 or 3MHz frequency (selectable by sd2_frequ)

1 : 3 or 4MHz frequency (selectable by sd2_frequ)

0sd1_fsel

Selects between high and low frequency range

0 : 2 or 3MHz frequency (selectable by sd1_frequ)

1 : 3 or 4MHz frequency (selectable by sd1_frequ)

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