Specifications

Si3216
96 Rev. 1.0
Not Recommended
f
o
r N
e
w
D
e
si
g
n
s
Reset settings = 0001_0100 (Si3216)
Reset settings = 0011_0100 (Si3216M)
Reset settings = 0000_0000
Register 93. DC-DC Converter Switching Delay
BitD7D6D5D4D3D2D1D0
Name
DCCAL DCPOL DCTOF[4:0]
Type R/W R R/W
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 Si3216 are offered to support the two relationships.
0 = DCFF pin polarity is opposite of DCDRV pin (Si3216).
1 = DCFF pin polarity is same as DCDRV pin (Si3216M).
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. T
OFF
= (DCTOF + 4)x61.035 ns.
Register 94. DC-DC Converter PWM Pulse Width
BitD7D6D5D4D3D2D1D0
Name
DCPW[7:0]
Type R
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.