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MC9S12A128 Datasheet(PDF) 95 Page - Freescale Semiconductor, Inc |
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MC9S12A128 Datasheet(HTML) 95 Page - Freescale Semiconductor, Inc |
95 / 140 page Device User Guide — 9S12DT128DGV2/D V02.17 97 Freescale Semiconductor Appendix A Electrical Characteristics A.1 General This introduction is intended to give an overview on several common topics like power supply, current injection etc. A.1.1 Parameter Classification The electrical parameters shown in this supplement are guaranteed by various methods. To give the customer a better understanding the following classification is used and the parameters are tagged accordingly in the tables where appropriate. P: Those parameters are guaranteed during production testing on each individual device. C: Those parameters are achieved by the design characterization by measuring a statistically relevant sample size across process variations. They are regularly verified by production monitors. T: Those parameters are achieved by design characterization on a small sample size from typical devices. All values shown in the typical column are within this category. D: Those parameters are derived mainly from simulations. A.1.2 Power Supply The MC9S12DT128 utilizes several pins to supply power to the I/O ports, A/D converter, oscillator, PLL and internal logic. The VDDA, VSSA pair supplies the A/D converter and the resistor ladder of the internal voltage regulator. The VDDX, VSSX, VDDR and VSSR pairs supply the I/O pins, VDDR supplies also the internal voltage regulator. VDD1, VSS1, VDD2 and VSS2 are the supply pins for the digital logic, VDDPLL, VSSPLL supply the oscillator and the PLL. VSS1 and VSS2 are internally connected by metal. VDDA, VDDX, VDDR as well as VSSA, VSSX, VSSR are connected by anti-parallel diodes for ESD protection. |
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