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TD7623AFN Folha de dados(PDF) 7 Page - Toshiba Semiconductor |
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TD7623AFN Folha de dados(HTML) 7 Page - Toshiba Semiconductor |
7 / 19 page TD7623AFN 2001-03-01 7/19 OPERATION INSTRUCTIONS The TD7623AFN can be controlled with either the 3-wire bus or standard I2C bus. The 3-wire bus mode, the device is controlled by 27-bit serial data. The I2C bus conforms to the standard I2C bus format. The bus supports two-way bus communications control, consisting of WRITE mode where data are received and READ mode where data are transmitted. In READ mode, the voltage applied on the A / D converter input pin can be transmitted and output with 5-level resolution. (This function is only valid when the I2C bus is selected. When the 3-wire bus is selected, the A / D converter input pin function as the LOCK output pin.) Addresses can be set using the hardware bits. Three programmable addresses are supported. 3-wire bus and standard I2C bus are switches by the voltage applied on the BUS-SW pin. The power-on reset circuit is built in this product, and the detection voltage is designed about 1.4 V. If it raises to voltage of operation after making it stop for a while near the voltage of a power-on reset circuit of operation at the time of starting of a power supply, a power-on reset circuit may not operate normally. FUNCTION CHART NAME 3-WIRE BUS MODE I 2 C BUS MODE BUS-SW [VCC] [GND] CL / SCL CLOCK INPUT SCL INPUT DA / SDA DATA INPUT SDA IN / OUTPUT EN / ADR ENABLE INPUT ADDRESS LOCK / ADC LOCK ADC ― 3-WIRE BUS COMMUNICATIONS CONTROL ― The 3-wire bus mode, the device is controlled by 27-bit serial data. The 3-wire bus sets the following data : (bandswitch information and programmable counter information, charge-pump current setting, reference frequency divider ratio setting, and testing item functions.) The program frequency can be calculated in the following formula : fosc = fr × N fosc : Program frequency fr : Phase comparator reference frequency (Step frequency) N : Counter total ratio |
Nº de peça semelhante - TD7623AFN |
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Descrição semelhante - TD7623AFN |
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