U6239B 查看數據表（PDF） - Temic Semiconductors
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U6239B Datasheet PDF : 15 Pages
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U6239B
3-Wire Bus Description (continued)
Reference divider selection RD1, RD2, RDS:
RDS Voltage at
RD2
Pin 3
0 to 10% VS or open
0
0 to 10% VS or open
0
0 to 10% VS or open
1
0 to 10% VS or open
1
90 to 100% VS
0
90 to 100% VS
0
90 to 100% VS
1
90 to 100% VS
1
* when a 4-MHz crystal is used
RD1
Reference
Divider Ratio
0
280
1
50
0
500
1
100
0
140
1
25
0
250
1
50
Frequency
Step Size*
228.57 kHz
1280 kHz
128 kHz
640 kHz
457.14 kHz
2560kHz
256 kHz
1280 kHz
3-Wire Bus Pulse Diagram
SDA
SCL
ENABLE
4 Port bits/ 2 Ref.Div. bits
MSB
P4 P5 RD1 RD2 P6 P7 n13
14-bit scaling factor SF
Figure 3.
Maximum Operating
Frequency*
2.9 GHz
2.9 GHz
2.097 GHz
2.9 GHz
2.9 GHz
2.9 GHz
2.9 GHz
2.9 GHz
LSB
n0
9611813
n0 to n13 Scaling factor (SF)
P4 to P7 Port outputs
RD1, RD2 Reference divider selection
SF = 8192 n13 + 4096
SF - Range: 256..16383
P4 - P7 = 1: port active
see table above
n12 + ... +2
n1 + n0
3-Wire Bus Timing
Data
LSB
Clock
Enable
TL
TS TC TH TSL
TT
9611880
Figure 4.
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10 (15)
TELEFUNKEN Semiconductors
Rev. A3, 28-May-97
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