TDA6509 데이터 시트보기 (PDF) - NXP Semiconductors.
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TDA6509 Datasheet PDF : 42 Pages
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Philips Semiconductors
3-band mixer/oscillator and PLL for
terrestrial tuners
Product specification
TDA6508; TDA6508A;
TDA6509; TDA6509A
Table 4 Reference divider ratio selection bits
RSA
X
0
1
RSB
0
1
1
REFERENCE DIVIDER RATIO
80
1 28
64
FREQUENCY STEP (kHz)(1)
50
31.25
62.5
Note
1. Crystal oscillator frequency or externally sourced reference frequency of 4 MHz at pin XTAL_REF.
Table 5 Test mode selection bits
T2
0
0
0
0
1
1
1
1
T1
0
0
1
1
1
1
0
0
T0
0
1
0
1
0
1
0
1
TEST MODE
normal mode (read and write mode bytes allowed)
normal mode (read and write mode bytes allowed)(1)
charge-pump is off(2)
byte BB ignored
charge-pump sinks current
charge-pump sources current
1⁄2fref is output from port P3(3)
1⁄2fdiv is output from port P3(3)
Notes
1. This is the default mode at power-on reset.
2. 1⁄2fdiv is output from port P3 when the charge-pump is off.
3. Port P3 cannot be used when these test modes are active.
8.3 Read mode
The read mode is defined by setting bit R/W to logic 1 in
address byte ADB; see Table 6.
After the slave address has been recognized, the device
generates an acknowledge pulse, and status byte SB is
transferred on the SDA line (MSB first). Data is valid on the
SDA line when pin SCL is HIGH. A second data byte can
be read from the device if the microcontroller generates an
acknowledge on the SDA line (master acknowledge).
End of transmission will occur if no master acknowledge is
asserted. The device will then release the data line to allow
the microcontroller to generate a STOP condition.
Bit POR is set to logic 1 at power-on. This bit is reset when
an end-of-data is detected by the device at the end of a
read sequence. Bit FL controls the PLL by indicating when
the loop is locked (bit FL = 1).
The internal ADC can be used to apply AFC information to
a microcontroller in the IF section of the television via
status byte bits A0, A1 and A2. Up to five voltage levels
can be applied to the ADC input pin ADC; the resultant
values of bits A2, A1 and A0 are shown in Table 8.
2005 Mar 25
10
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