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PIC16F72/ML 数据表(PDF) 95 Page - Microchip Technology |
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PIC16F72/ML 数据表(HTML) 95 Page - Microchip Technology |
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95 / 136 page  2002 Microchip Technology Inc. DS39597B-page 93 PIC16F72 14.3 Timing Parameter Symbology The timing parameter symbols have been created following one of the following formats: FIGURE 14-3: LOAD CONDITIONS 1. TppS2ppS 3. TCC:ST (I2C specifications only) 2. TppS 4. Ts (I2C specifications only) T F Frequency T Time Lowercase letters (pp) and their meanings: pp cc CCP1 osc OSC1 ck CLKO rd RD cs CS rw RD or WR di SDI sc SCK do SDO ss SS dt Data in t0 T0CKI io I/O port t1 T1CKI mc MCLR wr WR Uppercase letters and their meanings: S FFall P Period HHigh R Rise I Invalid (Hi-impedance) V Valid L Low Z Hi-impedance I2C only AA output access High High BUF Bus free Low Low TCC:ST (I2C specifications only) CC HD Hold SU Setup ST DAT DATA input hold STO STOP condition STA START condition VDD/2 CL RL Pin Pin VSS VSS CL RL = 464 Ω CL = 50 pF for all pins except OSC2 15 pF for OSC2 output Load Condition 1 Load Condition 2 |
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