NJW1503A
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Serial Bus Data Format (3-Wire bus)
1. Bus protocol for18bit
B3 B2 B1 B0 N13 N12 N11 N10 N9 N8 N7 N6 N5 N4 N3 N2 N1 N0
Reference divider : f
xtal
1/512
2. Bus protocol for19bit
B3 B2 B1 B0 N14 N13 N12 N11 N10 N9 N8 N7 N6 N5 N4 N3 N2 N1 N0
Reference divider : f
xtal
1/1024
3. Bus protocol for Test (27bit)
B3 B2 B1 B0 N14 N13 ...N1 N0 T7 T6 T5 T4 T3 T2 T1 T0
B0 to B3 : Control of Band Switch
N0 to N14 : Control of Programmable Divider N14=MSB N0=LSB
Division ratio : N=2
14
×N14+2
13
× N13+······+2
1
×N1+N0
Maximum division ratio 32767
Minimum division ratio 256
T0 to T7 : Control bit of test
Bit T0: Charge Pump Current
T0 Charge Pump Current Conditions
0 280uA Normal, Default
1 60uA Test
Bit T1 and T2: Output function of Phase Comparator
T2 T1 Phase Comparator Conditions
0 0 Normal Operation Normal, Default
0 1 Source Test
1
1 High Impedance Test
1
0 Sink Test
Bit T4: Band Switch Test
T4 Band Switch Conditions
0 Normal Operation Normal, Default
1 Test Test
Bit T5 and T6: Reference Divider
T6 T5 Reference Divider Condition
0 0 1/512 Normal, Default
0 1 1/1024
1
* 1/640
* : don’t care; 0 or 1
The 18bit and 19bit is automatic selector of the reference divider.
T3: unassigned, undefined
(Note)
Default : Power on reset
