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CR16MAS5VJI4 Datasheet(PDF) 10 Page - National Semiconductor (TI) |
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CR16MAS5VJI4 Datasheet(HTML) 10 Page - National Semiconductor (TI) |
10 / 156 page www.national.com 10 4.1 PIN DESCRIPTION Some pins have alternate functions which may be enabled. These pins can be individually configured as general pur- pose pins, even when the module they belong to is enabled. The following is a brief description of all device pins. Table 2 Input Pins Signal Type Active Pin (* for a shared pin) Function X1CKI OSC High Main oscillator clock input. X2CKI OSC High 32kHz oscillator clock input. RESET CMOS Low Chip general reset pin. Schmitt trigger input, asynchronous. ISE CMOS Low Interrupt input for development system. T1B CMOS Prog. * Timer 1 input B. Shares pin with I/O port pin PF1. T2B CMOS Prog. * Timer 2 input B. Shares pin with I/O port pin PF5. RDX1 CMOS High * USART 1 receive data input. Shares pin with I/O port pin PG5. RDX2 CMOS High * USART 2 receive data input. Shares pin with I/O port pin PG0. ACH0 Analog * A2D converter channel 0. Shares pin with I/O port pin PI0 ACH1 Analog * A2D converter channel 1. Shares pin with I/O port pin PI1 ACH2 Analog * A2D converter channel 2. Shares pin with I/O port pin PI2 ACH3 Analog * A2D converter channel 3. Shares pin with I/O port pin PI3 ACH4 Analog * A2D converter channel 4. Shares pin with I/O port pin PI4 ACH5 Analog * A2D converter channel 5. Shares pin with I/O port pin PI5 ACH6 Analog * A2D converter channel 6. Shares pin with I/O port pin PI6 ACH7 Analog * A2D converter channel 7. Shares pin with I/O port pin PI7 ACH8 Analog * A2D converter channel 8. Shares pin with I/O port pin PH0 ACH9 Analog * A2D converter channel 9. Shares pin with I/O port pin PH1 ACH10 Analog * A2D converter channel 10. Shares pin with I/O port pin PH2 ACH11 Analog * A2D converter channel 11. Shares pin with I/O port pin PH3 MWCS CMOS Low * SPI/MICROWIRE slave select. Shares pin with I/O port pin PH4. NMI CMOS Low External non-maskable interrupt. ENV0 CMOS Low * Strap to select operating environment. ENV1 CMOS Low * Strap pin to select operating environment. ENV2 CMOS Low Strap pin to select operating environment. CANRx CMOS High CAN receive data input. Table 3 Output Pins Signal Type Active Pin (* for a shared pin) Function X1CKO OSC High Main oscillator clock output. X2CKO OSC High 32kHz oscillator clock output. CLK CMOS High * External reference clock for development environment (shared with ENV1). CLKOUT 1 CMOS High * Clock output generated through prescaler (shared with ENV0). CLKOUT 2 CMOS High * Clock output generated through prescaler (shared with ENV1). |
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