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TDA6502A 데이터시트(PDF) 11 Page - NXP Semiconductors

부품명 TDA6502A
상세설명  5 V mixers/oscillators and synthesizers for cable TV and VCR 2-band tuners
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제조업체  PHILIPS [NXP Semiconductors]
홈페이지  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TDA6502A 데이터시트(HTML) 11 Page - NXP Semiconductors

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2000 Mar 16
11
Philips Semiconductors
Preliminary specification
5 V mixers/oscillators and synthesizers for
cable TV and VCR 2-band tuners
TDA6502; TDA6502A;
TDA6503; TDA6503A
Table 8
Reference divider ratio select bits
8.2.3
READ MODE
The read mode is defined by the address byte ADB with bit R/W = 1 (see Table 9).
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 during a HIGH level of the SCL line. 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.
Bit POR is set to logic 1 at power-on. The bit 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 bit FL which indicates when the loop is locked (bit FL = 1)
A built-in ADC input is available on pin LOCK/ADC (I2C-bus mode only). This converter can be used to apply AFC
information to the microcontroller of the IF section of the television.
Table 9
Read data format
Note
1. MSB is transmitted first.
Table 10 Description of the bits used in Table 9
RSA
RSB
REFERENCE DIVIDER RATIO
FREQUENCY STEP (kHz)
X
0
80
50
0
1
128
31.25
1
1
64
62.5
NAME
BYTE
BIT
MSB(1)
LSB
Address byte
ADB
1
1
0
0
0
MA1
MA0
R/W=1
Status byte
SB
POR
FL
R
1
1
A2
A1
A0
BIT
DESCRIPTION
MA1 and MA0
programmable address bits (see Table 6)
R/W
logic 1 for read mode
POR
Power-on reset flag:
logic 0: at power-off
logic 1: at power-on
FL
in-lock flag:
logic 0: loop is not locked
logic 1: loop is locked
R
ready flag:
logic 0: mode after Power-on reset (bit T2 = 0, bit T1 = 0 and bit T0 = 1) and the PLL is locked
logic 1: in other conditions
A2, A1 and A0
digital outputs of the 5-level ADC (see Table 11)


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