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EM78M612DDM Datasheet(PDF) 6 Page - ELAN Microelectronics Corp |
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EM78M612DDM Datasheet(HTML) 6 Page - ELAN Microelectronics Corp |
6 / 38 page EM78M612 Universal Serial Bus Microcontroller Series This specification may change without further notice. 2004/4/28 V1.1 6 6 Pin Description Symbol I/O Function OSCI I 6MHz / 12MHz ceramic resonator or crystal input. OSCO I/O Return path for 6-MHz / 12MHz ceramic resonator or crystal. VNN Used in programming the on-chip ROM. During normal operation, this pin is connected to Ground. V3.3V O 3.3V DC voltage output from internal regulator. This pin has to be tied to a 4.7μF capacitor. P60/VPP I P60 functins as an input pin only (no output) For serial signal transmission application, the Pin P60 is used as a serial signal input pin. For detailed usage and function, refer to Section 8.8, Pattern Detecting Application of this Spec. P61 ~ P67 I/O 7 GIOP pins. The pull high resistors (200K Ohms) and pull low resistors (15K Ohm) are selected through pin programming. All Port6 I/O pins are used for AD function. Furthermore,P64 & P65 can also be used for PWM function. P70 ~ P77 I/O Port7 offers up to 8 GIOP pins. The sink current of P70 & P71 are programmable for driving LED. Each pin has pull high resistors (200K Ohm) that can be selected through pin programming. All Port7 I/O pins can be used for AD function. D+ / P50 I/O USB Plus data line interface or PS/2 line interface are user-defined through firmware setting. When this pin is used as a PS/2 line interface, it will generate an interrupt when its state changes. D- / P51 I/O USB Minus data line interface or PS/2 line interface are user-defined through firmware setting. When this pin is used as a PS/2 line interface, it will generate an interrupt when its state changes. VDD - Connects to the USB power source or to a nominal 5V-power supply. Actual VDD range can vary between 4.4V and 5.2V. VSS - Connects to ground. Table 7.1 Pin Descriptions |
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