CS5461A datasheet(31/44 Pages) CIRRUS

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CS5461A

DS661F2

6.15 Pulsewidth Register ( PW )

Address: 21

Default = 0x000200 = 512 sample periods

PW sets the pulsewidth of E1 and E2 pulses in Alternate Pulse and Mechanical Counter format. The width is a

function of number of sample periods. The default corresponds to a pulsewidth of

512 samples/[(MCLK/K)/1024] = 128 msec with MCLK = 4.096 MHz and K = 1. The value is represented in un-

signed notation.

6.16 E3 Pulse Width Register ( PulseWidth )

Address: 22

Default = 0x000000 = Hardware-generated pulse width (up to 125

µs)

The PulseWidth register sets the pulse width of E3 pulses in units of 1/OWR.

E3 pulse width =

The range of this register is from 1 to 8388607.

6.17 Voltage Sag Duration Register ( VSAGDuration )

Address: 23

Default = 0x000000

Voltage Sag Duration (VSAGDuration) defines the number of instantaneous voltage measurements utilized to de-

termine a voltage level sag event (VSAGLEVEL). Setting this register to zero will disable Voltage Sag-detect. The

value is represented in unsigned notation.

6.18 Voltage Sag Level Register ( VSAGLevel )

Address: 24

Default = 0x000000

Voltage Sag Level (VSAGLevel) defines the voltage level that the magnitude of input samples, averaged over the

sag duration, must fall below in order to register a sag condition. This value is represented in unsigned notation

and in the range of 0

≤ VSAG

Level < 1.0, with the binary point to the right of the MSB.

MSB

LSB

223

222

221

220

219

218

217

216

.....

MSB

LSB

222

221

220

219

218

217

216

.....

MSB

LSB

222

221

220

219

218

217

216

.....

PulseWidth

MCLK

() K

⁄

() 1024

⁄

---------------------------------------------

MSB

LSB

2-1

2-2

2-3

2-4

2-5

2-6

2-7

.....

2-17

2-18

2-19

2-20

2-21

2-22

2-23

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