TDA6402 Datasheet, PDF (10/40 Pages) NXP Semiconductors – 5 V mixers/oscillators and synthesizers for cable TV and VCR 2-band tuners

Philips Semiconductors
5 V mixers/oscillators and synthesizers for
cable TV and VCR 2-band tuners
Product specification
TDA6402; TDA6402A;
TDA6403; TDA6403A
Table 8 Reference divider ratio select bits
RSA
X⁽¹⁾
0
1
RSB
0
1
1
REFERENCE DIVIDER RATIO
640
1 024
512
Note
1. X = don’t care.
FREQUENCY STEP (kHz)
6.25
3.90625
7.8125
READ MODE; R/W = 1 (see Table 9)
Data can be read from the device by setting the R/W bit to
logic 1. After the slave address has been recognized, the
device generates an acknowledge pulse and the first data
byte (status byte) is transferred on the SDA line (MSB
first). Data is valid on the SDA line during a HIGH-level of
the SCL clock signal. 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
occurs. The device will then release the data line to allow
the microcontroller to generate a STOP condition.
The POR flag is set to logic 1 at power-on. The flag is reset
when an end-of-data is detected by the device (end of a
READ sequence). Control of the loop is made possible
with the in-lock flag FL which indicates when the loop is
locked (FL = 1).
The automatic charge pump switch flag (ACPS) is LOW
when the automatic charge pump switch mode is ‘ON’ and
the loop is locked. In other conditions, ACPS = 1.
When ACPS = 0, the charge pump current is forced to the
LOW value.
A built-in ADC is available on LOCK/ADC pin (I²C-bus
mode only). This converter can be used to apply AFC
information to the microcontroller from the IF section of the
television. The relationship between the bits A2, A1 and A0
is given in Table 11.
Table 9 Read data format
NAME
Address byte
Status byte
BYTE
MSB⁽¹⁾
ADB
1
1
0
SB
POR
FL ACPS
Note
1. MSB is transmitted first.
BITS
0
0
1
1
MA1
A2
MA0
A1
LSB
R/W = 1
A0
ACK
A
−
Table 10 Description of symbols used in Table 9
SYMBOL
A
POR
FL
ACPS
A2, A1, A0
DESCRIPTION
acknowledge
power-on reset flag (POR = 1 at power-on)
in-lock flag (FL = 1 when the loop is locked)
automatic charge pump switch flag:
ACPS = 0; active
ACPS = 1; not active
digital outputs of the 5-level ADC
2000 Jan 24
10