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TC534CKW Folha de dados(PDF) 9 Page - Microchip Technology |
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TC534CKW Folha de dados(HTML) 9 Page - Microchip Technology |
9 / 22 page © 2002 Microchip Technology Inc. DS21433B-page 9 TC530/TC534 FIGURE 3-2: SERIAL PORT TIMING FIGURE 3-3: A/D CONVERTER TIMING 3.3 Input Integrate Phase (INT) In this phase, a current directly proportional to differen- tial input voltage is sourced into integrating capacitor CINT. The amount of voltage stored on CINT at the end of the INT phase is directly proportional to the applied differential input voltage. Input signal polarity (sign bit) is determined at the end of this phase. Converter resolution and speed is a function of the duration of the INT phase, which is programmable by the user via the serial port (see Section 4.1.1, AZ and INT Phase Dura- tion). The shorter the integration time, the faster the speed of conversion (but the lower the resolution). Conversely, the longer the integration time, the greater the resolution (but at slower the speed of conversion). TRD TRS TDRS TPWL R/W Read Timing Read Format Write Format Write Timing Write Default Timing EOC DOUT DCLK R/W EOC DOUT DCLK EOC SGN MSB LSB OVR TLS TDLS TPWL R/W DIN DCLK TLDL TLDS DIN R/W DOUT DCLK MSB LSB For Polled vs Interrupt Operation and Write Value Modified Cycle Use TC520A Data Sheet (DS21431). R/W EOC TDR AZ Updated Data Ready Updated Data Ready INT DINT IZ AZ Conversion Phase Data to Serial Port Transmit Register |
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