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U4256BM Datasheet, PDF (5/14 Pages) TEMIC Semiconductors – Frequency Synthesizer for Radio Tuning | |||
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U4256BM
Data Transfer
A
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ MSB
BYTE 2
LSB MSB
BYTE 1
LSB
ADDR.
Oscillator tuning function
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ 1 0 8pF 32pF 16pF 8pF 4pF 2pF 1pF 0.5pF
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ B85 B84 B83 B82 B81 B80 B79 B78 B77 B76 B75 B74 B73 B72
B
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ MSB
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ ADDR.
0 0 IPD IPD
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ 1,2 3,4
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ B71 B70
Byte 3
LSB MSB
BYTE 2
LSB MSB
BYTE 1
LSB
STATUS 0
R â DIVIDER
OSCB Pâ22 Pâ21 Pâ20 215 214 213 212 211 210 29 28 27 26 25 24 23 22 21 20
0 = on,
1 = off
B69 B68 B67 B66 B65 B64 B63 B62 B61 B60 B59 B58 B57 B56 B55 B54 B53 B52 B51 B50
C
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ MSB
BYTE 2
LSB MSB
BYTE 1
LSB
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ ADDR.
DAC1 â GAIN & OFFSET
0 0 Oâ25 Oâ24 Oâ23 Oâ22 Oâ21 Oâ20 Gâ27 Gâ26 Gâ25 Gâ24 Gâ23 Gâ22 Gâ21 Gâ20
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ B49 B48 B47 B46 B45 B44 B43 B42 B41 B40 B39 B38 B37 B36
D
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ MSB
Byte 3
LSB
MSB
BYTE 2
LSB MSB
BYTE 1
LSB
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ ADDR.
STATUS 1
N â DIVIDER
0 1 0 AM = 1 SWO4 SWO3 SWO2 SWO1 215 214 213 212 211 210 29 28 27 26 25 24 23 22 21 20
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ FM=0 1=off, 1=off, 1=off, 1=off,
0=on 0=on 0=on 0=on
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ B35 B34 B33 B32 B31 B30 B29 B28 B27 B25 B24 B23 B22 B22 B21 B20 B19 B18 B17 B16 B15 B14
E
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ MSB
BYTE 2
LSB MSB
BYTE 1
LSB
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ ADDR.
DAC2 â GAIN & OFFSET
0 1 Oâ25 Oâ24 Oâ23 Oâ22 Oâ21 Oâ20 Gâ27 Gâ26 Gâ25 Gâ24 Gâ23 Gâ22 Gâ21 Gâ20
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ B13 B12 B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0
Rev. A2, 03-Nov-98
5 (14)
Preliminary Information
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