U6207B Datasheet, PDF (4/8 Pages) TEMIC Semiconductors – 1.3 GHz PLL with I2C Bus for TV Tuner

U6207B
I²C Bus Description
Data Formats
Description
Address byte
Progr. divider byte 1
Progr. divider byte 2
Control byte 1
Control byte 2
Data Format
MSB
LSB
1
1
0
0
0 AS1 AS2 0
A
0 n14 n13 n12 n11 n10 n9 n8 A
n7 n6 n5 n4 n3 n2 n1 n0 A
1
5I T1 T0 X
X PSC OS A
SW7 X
X
X
X SW2 SW1 X
A
A = Acknowledge; X = not used; Unused bits of controlbyte 2 should be 0 for lowest power consumption.
n0 ... n14: Scaling factor (SF)
PSC
Prescaler on/off
T0, T1
Testmode selection
SW 1, 2, 7 Switching outputs
5I
Charge pump current switch
OS
Output switch
SF = 16384*n14 + 8192*n13 + ... +2*n1 + n0
PSC = 1: prescaler on (PSF = 8)
PSC = 0: prescaler off (PSF = 1)
T1 = 1: divider test mode on
T1 = 0: divider test mode off
T0 = 1: charge pump disable
T0 = 0: charge pump enable
SW1, SW2, SW7 = 1: open collector active
5I = 1: high current
5I = 0: low current
OS = 1: varicap drive disable
OS = 0: varicap drive enable
AS1, AS2 Address selection pin 7
AS1 AS2 Address
01
1
00
2
10
3
11
4
Dec. Value
194
192
196
198
Voltage at pin7
open
0 to 10% Vs
40 to 60% Vs
90 to 100% Vs
Oscillator Frequency Calculation
f_osc = f_ref * SF * PSF
f_osc Locked oscillator frequency
f_ref Reference frequency 4 MHz / 512 = 7.8125 kHz
SF Scaling factor of programmable 15-bit-divider
PSF Scaling factor of prescaler
4 (8)
TELEFUNKEN Semiconductors
Rev. A1, 29-May-96