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TSA5055T データシート(PDF) 4 Page - NXP Semiconductors |
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TSA5055T データシート(HTML) 4 Page - NXP Semiconductors |
4 / 20 page 1999 Aug 11 4 Philips Semiconductors Product specification 2.65 GHz bidirectional I2C-bus controlled synthesizer TSA5055T PINNING SYMBOL PIN DESCRIPTION PD 1 charge-pump output Q1 2 crystal oscillator input 1 Q2 3 crystal oscillator input 2 SDA 4 serial data input/output SCL 5 serial clock input P7 6 port output/input (general purpose) P6 7 port output/input (ADC) P5 8 port output/input (general purpose) P4 9 port output/input (general purpose) P3 10 port output (also used for address selection) P0 11 port output VCC 12 voltage supply RFIN1 13 RF signal input 1 RFIN2 14 RF signal input 2 (decoupled) GND 15 ground UD 16 drive output Fig.2 Pin configuration. handbook, halfpage 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 TSA5055T PD Q1 Q2 SDA SCL P7 P6 P5 UD GND RFIN2 RFIN1 VCC P0 P3 P4 MBC304 FUNCTIONAL DESCRIPTION General The TSA5055T is controlled via the 2-wire I2C-bus. For programming, there is one (7-bit) module address and the R/W bit for selecting READ or WRITE mode. WRITE mode: R/W=0; see Table 1 After the address transmission (first byte), data bytes can be sent to the device. Four data bytes are needed to fully program the TSA5055T. The bus transceiver has an auto-increment facility that permits the programming of the TSA5055T within one single transmission (address + four data bytes). The TSA5055T can also be partly programmed on the condition that the first data byte following the address is byte 2 or byte 4. The meaning of the bits in the data bytes is given in Table 1. The first bit of the first data byte transmitted indicates whether frequency data (first bit = 0) or charge-pump and port information (first bit = 1) will follow. Until an I2C-bus STOP condition is sent by the controller, additional data bytes can be entered without the need to re-address the device. This allows a smooth frequency sweep for fine tuning. At power-on, the ports are set to the high-impedance state. The 7.8125 kHz reference frequency is obtained by dividing the output of the 4 MHz crystal oscillator by 512. Because the input of the RF signal is first divided by 16, the step size is 125 kHz. A 3.2 MHz crystal can offer a step size of 100 kHz. |
同様の部品番号 - TSA5055T |
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同様の説明 - TSA5055T |
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