S1M8837 Samsung Semiconductor, Inc., S1M8837 Datasheet - Page 20

• Manufacturer Part Number: S1M8837
• Description: Fractional-n Rf/integer-n If Dual Pll
• Manufacturer: Samsung Semiconductor, Inc.

S1M8836/37
Programmable PFD and Charge Pump
IF Charge Pump Gain ( IF_CP_WORD; W2[18] )
RF Charge Pump Gain ( RF_CP_WORD; W3[17:14] )
Phase Detector Polarity ( RF_CP_WORD/IF_CP_WORD; W3[13]/W2[17] )
Depending on VCO characteristics, W2[17] and W3[13] bits should be set as follows :
20
RF_CP_WORD
Control Words
Control Words
IF_CP_WORD
Icpo ( A)
Control bits
100
200
250
400
450
800
50
W2[17]
W3[13]
Control bits
Control bits
W3[17:14]
W2[18]
W3[17]
8X
0
0
0
0
0
1
1
Negative Slope
Negative Slope
LOW (0)
IF_CP_GAIN
RF_CP_LVL
Acronym
Acronym
W3[16]
select 16-level charge pump current
4X
0
0
0
1
1
0
1
1x (100 A)
LOW (0)
LOW (0)
Positive Slope
Positive Slope
HIGH (1)
FRACTIONAL-N RF/INTEGER-N IF DUAL PLL
W3[15]
2X
0
0
1
0
1
0
1
8x (800 A)
HIGH (1)
HIGH (1)
Comments
RF charge pump
RF PFD
IF charge pump
IF PFD
Comments
Comments
W3[14]
1X
0
1
1
0
1
0
1