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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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TDA6404 데이터시트(PDF) 8 Page - NXP Semiconductors |
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TDA6404 데이터시트(HTML) 8 Page - NXP Semiconductors |
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8 / 32 page  1999 Jan 13 8 Philips Semiconductors Product specification 5 V mixer/oscillator-PLL synthesizers for hyperband tuners TDA6404; TDA6405; TDA6405A Table 4 Address selection I2C-bus Table 5 Test mode Notes 1. This is the default mode at Power-on reset. 2. The ADC input cannot be used when these test modes are active. Table 6 Reference divider ratio select bits MA1 MA0 VOLTAGE APPLIED ON AS INPUT 0 0 0 to 0.1VCC 0 1 open or 0.2VCC to 0.3VCC 1 0 0.4VCC to 0.6VCC 1 1 0.9VCC to 1.0VCC T2 T1 T0 TEST MODES 0 0 0 automatic charge pump off 0 0 1 automatic charge pump on; note 1 0 1 X charge pump is ‘OFF’ 1 1 0 charge pump is sinking current 1 1 1 charge pump is sourcing current 100 fREF is available on pin ADC; note 2 101 1 ⁄2fDIV is available on pin ADC; note 2 RSA RSB REFERENCE DIVIDER RATIO FREQUENCY STEP (kHz) X 0 640 6.25 0 1 1024 3.90625 1 1 512 7.8125 Read mode Data can be read from the devices by setting the R/W bit to logic 1 (see Tables 7 and 8). After the slave address has been recognized, the devices generate 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 devices if the processor generates an acknowledge on the SDA line (master acknowledge). End of transmission will occur if no master acknowledge occurs. The devices will then release the data line to allow the processor 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 devices (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 ACPS flag 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 ADC pin. This converter can be used to apply AFC information to the controller from the IF section of the television. The relationship between the bits A2, A1 and A0 is given in Table 9. |
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