S1M8837 Samsung Semiconductor, Inc., S1M8837 Datasheet - Page 14

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

S1M8836/37
Programming Description
The S1M8836/37 can be programmed via the serial bus interface. The interface is made of 3 functional signals:
clock, data, and latch enable(LE). Serial data is moved into the 22-bit shift register on the rising edge of the
clock. These data enters MSB first. When LE goes HIGH, data in the shift register is moved into one of the 4
latches (by the 2-bit control).
Control Bit Map (CTL[1:0])
Data Bit Map (DATA[21:2])
14
WORD1(W1)
WORD2(W2)
WORD3(W3)
WORD4(W4)
MSB
CTL2(CTL[1])
First Bit
21 20 19 18 17 16 15 14 13 12 11 10
RF_CTL_
IF_CTL_
WORD
WORD
CMOS
FoLD(4Bit)
0
0
1
1
IF_CP_
WORD
RF_R
(2Bit)
Control Bits
RF_CP_WORD
Data Flow (MSB First)
DATA[21:2]
REGISTER BIT LOCATION
CTL1(CTL[0])
IF_NB_CNTR(12Bit)
FRAC_CNTR(17Bit)
0
1
0
1
RF_NB_CNTR(7Bit)
IF _R_CNTR(15Bit)
FRACTIONAL-N RF/INTEGER-N IF DUAL PLL
9
8
7
6
DATA Location
RF_NA_CNTR
RF_NA_CNTR
5
WORD1
WORD2
WORD3
WORD4
(36:3Bit)
(37:4Bit)
CNTR(3Bit)
4
IF_NA_
3
CTL[1:0]
2
Last Bit
LSB
1
0 0
0 1
1 0
1 1
0