For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824

Phone: 978-250-3343

Fax: 978-250-3373

Order On-line at www.hittite.com

Application Support: Phone: 978-250-3343 or apps@hittite.com

32

HMC702LP6CE

v10.0812

14 GHz 16-BIT FRACTIONAL-N PLL

Table 25. Reg 14h CW Sweep Control Register

the maximum sweep range is limited to 510 x Fxtal/r. Delta-Sigma Modulator mode should be Feed

Forward when using Sweep feature (register 12h Bits [9:8] = 11.

Bit

Type

Name

Default

Description

0

r/W

clear_ovf_undf

0

asynchronous clear for ovf/undf flags

1

r/W

ramp_enable

0

ramp En/rstb

1= enables the cW ramp Function

2

r/W

ramp_trigg

0

Write always triggers ramps if bit <2> = 0, if bit

<2> = 1, ramp will not trigger, bit <2> must be

reset to 0 first

3

r/W

ramp_repeat_en

0

ramp repeat Seq enable

1= enables autotrigger of ramps

0 = ramp_trigg starts each ramp

4

r/W

ramp_startdir_dn

0

ramp start direction

1= Start with ramp Down

0= Start with ramp Up

5

r/W

ramp_trig_ext_en

0

Enable hardware trigger on GPo3 pin

6

r/W

ramp_singlestep

0

ramp single step, advances the ramp to the next

step, and holds frequency

7

r/W

ramp_singledir

0

ramps in one direction only with hop to start at

end of ramp

Table 26. Reg 15h CW Sweep Ramp Step Register

the maximum sweep range is limited to 510 x Fxtal/r. Delta-Sigma Modulator mode should be Feed

Forward when using Sweep feature (register 12h Bits [9:8] = 11.

Bit

Type

Name

Default

Description

23:0

r/W

ramp_step

800h

ramp Step size

Table 27. Reg 16h CW Sweep Ramp Step Number Register

the maximum sweep range is limited to 510 x Fxtal/r. Delta-Sigma Modulator mode should be Feed

Forward when using Sweep feature (register 12h Bits [9:8] = 11.

Bit

Type

Name

Default

Description

23:0

r/W

ramp_steps_number

800h

ramp number of steps in ramp

Table 28. Reg 17h CW Sweep Dwell Time Register

Bit

Type

Name

Default

Description

23:0

r/W

ramp_dwell_time

800h

ramp number of cycles to hold at top/bottom

in repeat mode

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