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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PC97307 датащи(PDF) 184 Page - National Semiconductor (TI) |
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PC97307 датащи(HTML) 184 Page - National Semiconductor (TI) |
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184 / 218 page  184 Device Description www.national.com 13.2.2 Group 2 Pin List: BUSY, PE, SLCT, WAIT Output from SLCT, PE and BUSY is open-drain in all SPP modes, except in SPP Compatible mode when the setup mode is ECP-based FIFO and bit 4 of the Control2 parallel port register is 1. (See Table 6-1 on page 112.) Otherwise, output from these signals is level 2. External 4.7 K Ω pull-up resistors should be used. PE is controlled by bit 2 of PP Confg0, and it is in Group 2 only if bit 2 of PP Confg0 Register is “0”. See Section 6.5.19 on page 127. All group 2 pins are back-drive protected. TABLE 13-6. DC Characteristics of Group 2 Pins 13.2.3 Group 3 Pin List: ACK, ERR, PE Output from ACK and ERR is open-drain in all SPP modes, except in SPP Compatible mode when the setup mode is ECP- based FIFO and bit 4 of the Control2 parallel port register is 1. (See Table 6-1 on page 112.) Otherwise, output from these signals is level 2. External 4.7 K Ω pull-up resistors should be used. PE is controlled by bit 2 of PP Confg0, and it is in Group 2 only if bit 2 of PP Confg0 Register is “0”. See section 6.5.19 on page 127. All group 3 pins are back-drive protected. TABLE 13-7. DC Characteristics of Group 3 Pins 13.2.4 Group 4 Pin List: MSEN1,0, SELCS SELCS is a CMOS input pin. TABLE 13-8. DC Characteristics of Group 4 Pins a. Not tested. Guaranteed by design. a. Not tested. Guaranteed by design. a. Not tested. Guaranteed by design. Symbol Parameter Conditions Min Max Units VIH Input High Voltage 2.0 VDD a V VIL Input Low Voltage −0.5 a 0.8 V IIL Input Leakage Current VIN = VDD 120 µA VIN = VSS −10 µA Symbol Parameter Conditions Min Max Units VIH Input High Voltage 2.0 VDD a V VIL Input Low Voltage −0.5 a 0.8 V IIL Input Leakage Current VIN = VDD 10 µA VIN = VSS −250 µA Symbol Parameter Conditions Min Max Units VIH Input High Voltage 2.0 VDD a V VIL Input Low Voltage −0.5 a 0.8 V IIL Input Leakage Current During Reset: VIN = VDD 10 µA VIN = VSS −150 µA |
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