Datasheet

MAX2870
23.5MHz to 6000MHz Fractional/
Integer-N Synthesizer/VCO
21Maxim Integrated
Table 9. Register 5 (Address: 101, Default: 00400005
HEX
)
Table 10. Register 6 (Read-Only Register)
BIT LOCATION BIT ID NAME DEFINITION
31:25 Reserved Reserved Reserved. Program to 0000000.
24 F01 F01
Sets integer mode for F = 0.
0 = If F[11:0] = 0, then fractional-N mode is set
1 = If F[11:0] = 0, then integer-N mode is auto set
23:22 LD[1:0]
Lock-Detect Pin
Function
Sets lock-detect pin function.
00 = Low
01 = Digital lock detect
10 = Analog lock detect
11 = High
21:19 Reserved Reserved Reserved. Program to 000.
18 MUX MUX MSB Sets mode at MUX_OUT pin (see register 2 [28:26])
17:3 Reserved Reserved Reserved. Program to 000000000000000.
2:0 ADDR[2:0]
Register
Address
Register address bits
BIT LOCATION BIT ID NAME DEFINITION
31:24 — Reserved Reserved
23 POR
Power_On_
Reset
POR readback status.
0 = POR has been read back
1 = POR has not been read back (registers at default)
22:20 ADC[2:0] VTUNE_ADC Reads back the ADC reading of the V
TUNE
(see the Tune ADC section)
19:9 — Reserved Reserved
8:3 V[5:0] Active VCO
Reads back the current active VCO.
000000 = VCO0
……
111111 = VCO63
2:0 ADDR[2:0]
Register
Address
Register address bits