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| FI1216MF Datasheet, PDF (16/24 Pages) NXP Semiconductors – Desktop video tuner multi system CCIR L/L’ and B/G | |||
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Philips Components
Desktop video tuner
multi system CCIR L/Lâ and B/G
Preliminary speciï¬cation
FI1216MF MK2
Remark: for channel selection involving band switching, and to ensure smooth tuning to the desired channel without
causing unnecessary charge pump action, it is recommended to consider the difference between wanted channel
frequency (fw) and the current channel frequency (fc):
⢠If fw > fc, use telegram as:
Start - Adb - Ack - Db1 - Ack - Db2 - Ack - Cb - Ack - Pb - Ack - Stop.
⢠If fw > fc, use telegram as:
Start - Adb - Ack - Cb - Ack - Pb - Ack - Db1 - Ack - Db2 - Ack - Stop.
Unnecessary charge pump action will result in very low tuning voltage (VT â 0 V) which may drive the oscillator to extreme
conditions.
READ mode
The in-lock can be read by setting the R/W bit to 1.
BITS
BYTE
7
MSB
6
5
4
3
2
1
0
LSB
A(5)
Address byte
1
1
0
0
0
MA1
MA0
1
A
Status byte
POR(1)
FL(2)
I2(3)
I1(3)
I0(3)
A2(4)
A1(4)
A0(4)
A
Notes
1. POR = Power On Reset. POR is internally set to 1 in case VS drops below 3 V. The POR bit is reset when an end of
data is detected by the PLL IC.
2. FL = In-lock flag; FL = 1: loop is phase-locked. The loop must be phase-locked during at least 8 periods of the internal
7.8125 kHz reference frequency before the FL flag is internally set to 1.
3. I2, I1 and I0 = digital information for I/O ports P2, P1 and P0 respectively.
4. A2, A1 and A0 = built-in 5-level A/D converter on I/O port P6. AFC information to the controller of the IF section is
available on pin 10 (see Table âDigital AFC statusâ).
5. A = Acknowledge.
TELEGRAM EXAMPLES (READ MODE)
Start - Adb - Ack - STB - Ack - STB - - Stop (no Ack from processor = End-of-data).
Start - Adb - Ack - STB - - Stop (no Ack from processor = End-of-data).
Where:
STB = Status byte.
1996 Jul 09
16
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