HMC700LP4 Datasheet, PDF (27/36 Pages) Hittite Microwave Corporation – 8 GHz 16-Bit Fractional-N PLL

v07.0411
HMC701LP6CE
8 GHz 16-Bit Fractional-N PLL
0
REGISTER MAP
Reg 00h Chip ID (Read Only) Register
Bit
Type
Name
Width
[23:0]
Ro
Chip ID
24
Default
581502
Chip ID
Description
Table 11. Reg 00h Strobe (Write Only) Register
Bit
Type
Name
Width
Default
0
STR global_swrst_regs
1
0
1
STR global_swrst_dig
1
0
2
STR mcnt_resynch
1
0
3
STR tsens_spi_strobe
1
0
Description
Strobe to soft reset the SPI registers
Strobe to soft reset the rest of digital
Reserved
Strobe to clock the temp measurement on
demand
Table 12. Reg 01h Enable & Reset Register
Bit
Type
Name
Default
0
R/W malg_vcobug_en
1
1
1
R/W mag_bias_en
1
1
2
R/W rfp_div_en
1
0
3
R/W xrefmux_todig_en
4
R/W rfp_div_todig_en
5
R/W rfp_sqr_todig_en
6
R/W rfp_sin_todig_en
7
R/W rfp_bug_sq_en
8
R/W rfp_bug_sin_en
9
R/W vcop_todig_en
10
R/W vcop_presc_en
11
R/W pfd_lkd_en
12
R/W cp_en
13
R/W dsm_rstb
14
R/W lkd_rstb
15
R/W pfds_rstb
1
1
1
0
1
0
1
0
1
1
1
0
1
0
1
1
1
0
1
1
1
0
1
0
1
1
Description
VCO Buffer Enable
Bias enable
Enables / Holds refdiv in reset
Holding Ref divider in reset is equivalent to
bypassing the divider, see Figure 4
Enables clock gate for xtal muxed (sq or sin)
reference to digital
Enables divided reference clock to the digital
see Figure 4
Enables square wave xtal clock to main digital
see Figure 4
Enables sine wave xtal clock to main digital
see Figure 4
Enables Square wave Ref Buffer, see Figure 4
Enables Sine wave Ref Buffer, see Figure 4
1= divided VCO as digital, Δ∑ modulator clock
0= Divided Ref path as the
Enables the prescaler bias
Enable / Resetb to digital lockdetect circuit and
PFD’s lockdetect output gates
Charge Pump Enable, disable is tri-stated output
1 - Enables fractional modulator
see also dsm_integer_mode Reg12h<3>
1 - enables lock detect circuit
CSP PFD FF rstb
1 - Enables the Cycle Slip Prevention (CSP)
feature of the PFD
0 - 27
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
978-250-3343 tel • 978-250-3373 fax • Order On-line at www.hittite.com
Application Support: [e-mail]