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HMC703LP4E
v02.0813
8 GHz fractional syntHesizer
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
978-250-3343 978-250-3373 fax Order On-line at www.hittite.com
Application Support: pll@hittite.com
table 25. reg 0ch altint
BIT
TYPE
NAME
W
DEFLT
DEsCRIPTION
[15:0]
R/W
ALTINT
16
25d
stop freq for Ramp mode, Alternate freq for FM mode. see “Opera-
tion Modes” for more information.
table 26. reg 0Dh altfrac
BIT
TYPE
NAME
W
DEFLT
DEsCRIPTION
[23:0]
R/W
ALTFRAC
24
0
stop freq for Ramp mode, Alternate freq for FM mode, number of
channels/boundary for Exact frequency mode. see “Operation
Modes” for more information.
table 27. reg 0eh sPi triG
BIT
TYPE
NAME
W
DEFLT
DEsCRIPTION
[0]
R/W
sPITRIG
1
0
This bit can be used as an alternative to the external TRIG pin.
If Reg06h[9] (EXTTRIG_EN)= 0 then this bit is used to trigger
sweep, FM, or PM modes,
Trigger requires initial state of 0 followed by a write of 1. Register
must be reset to 0 before subsequent triggers.
If Reg06[8] = 0, then in PM mode this register is level sensitive and
modulates the phase.
see “Operating Modes” for more information.