Motorola XTL 1500, Detailed Service Manual, Page: 152 / 452

6815854H01-A June 15, 2005
Troubleshooting Procedures : 700–800 MHz Main Board Troubleshooting 4-27
13 VRO 3.0-V supply for reference oscillator warp circuitry
14 VMULT2 Not used
15 VMULT1 Not used
16 INDMULT Not used
17 — No connection
18 REFSEL Not used
19 FREFOUT Not used
20 AVDD 3.0-V supply (analog)
21 VBPASS Not used
22 GND Ground (analog)
23 XTAL1 16.8 MHz reference oscillator input
24 XTAL2 Not used
25 WARP Reference oscillator warp output
26 SFCAP Superfilter bypass node
27 SFBASE Superfilter control node for Q6759
28 SFOUT Superfilter output
29 — No connection
30 SFIN Superfilter supply input
31 — No connection
32 PREIN Prescalar input
33 GROUND Ground (prescalar)
34 PRE_VDD 3.0-V supply
35 PVREF Not used
36 DVDD 3.0-V supply (digital)
37 TEST1 Not used
38 TEST2 Not used
39 CPB2 Phase detector bias input
40 CPB1 Phase detector bias input
41 MODOUT Modulation output
42 CCOMP Not used
43 IOUT Phase detector normal mode output
44 GND Ground (phase detector)
45 IADAPT Phase detector adapt mode output
46 ADAPTSW Phase detector adapt switch
47 VCP High-voltage supply for phase detector
48 AUX1 Auxiliary logic output, high selects U6754 OSC1
Table 4-15. LV Frac-N U6751 Pin Descriptions (700–800 MHz) (Continued)
Pin No. Pin Name Description