SI3201-X-FS View Datasheet(PDF) - Silicon Laboratories

Part Name

Description

Manufacturer

SI3201-X-FS

PROSLIC® PROGRAMMABLE CMOS SLIC WITH RINGING/BATTERY VOLTAGE GENERATION

Silicon Laboratories 

Si3233

Register 93. DC-DC Converter Switching Delay

Bit

D7

D6

D5

D4

D3

D2

D1

D0

Name DCCAL

DCPOL

DCTOF[4:0]

Type R/W

R

R/W

Reset settings = 0001_0100 (Si3233)

Reset settings = 0011_0100 (Si3233M)

Bit

Name

Function

7

DCCAL

DC-DC Converter Peak Current Monitor Calibration Status.

Writing a one to this bit starts the dc-dc converter peak current monitor calibration rou-

tine.

0 = Normal operation.

1 = Calibration being performed.

6

Reserved Read returns zero.

5

DCPOL DC-DC Converter Feed Forward Pin (DCFF) Polarity.

This read-only register bit indicates the polarity relationship of the DCFF pin to the

DCDRV pin. Two versions of the Si3233 are offered to support the two relationships.

0 = DCFF pin polarity is opposite of DCDRV pin (Si3233).

1 = DCFF pin polarity is same as DCDRV pin (Si3233M).

4:0 DCTOF[4:0] DC-DC Converter Minimum Off Time.

This register sets the minimum off time for the pulse width modulated dc-dc

converter control. TOFF = (DCTOF + 4) x 61.035 ns.

Register 94. DC-DC Converter PWM Pulse Width

Bit

D7

D6

D5

D4

D3

D2

D1

D0

Name

DCPW[7:0]

Type

R

Reset settings = 0000_0000

Bit

Name

Function

7:0 DCPW[7:0] DC-DC Converter Pulse Width.

Pulse width of DCDRV is given by PW = (DCPW – DCTOF – 4) x 61.035 ns.

Preliminary Rev. 0.5

77

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