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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PC8374L датащи(PDF) 22 Page - National Semiconductor (TI) |
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PC8374L датащи(HTML) 22 Page - National Semiconductor (TI) |
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22 / 239 page  1.0 Signal/Pin Connection and Description (Continued) www.national.com 22 Revision1.1 1.4.3 InfraRed Port 1.4.4 Parallel Port SOUT1 27 O O4/8 VDD3 Serial Output. Sends composite serial data to the communications link (peripheral device, modem or other data transfer device). These signals are set active high after a system reset. SOUT2 120 or 122 OO4/8 VDD3 Signal Pin(s) I/O Buffer Type Power Well Description IRRX 127 or 120 IINTS VDD3 InfraRed Receive. InfraRed serial input data. IRTX 128 or 118 OO6/12 VDD3 InfraRed Transmit. InfraRed serial output data. Signal Pin(s) I/O Buffer Type Power Well Description ACK 36 I INT VDD3 Acknowledge. Pulsed low by the printer to indicate that it has received data from the parallel port. AFD_DSTRB 50 O OD14,O14/14 VDD3 AFD - Automatic Feed. When low, instructs the printer to automatically feed a line after printing each line. This pin is in TRI-STATE after a 0 is loaded into the corresponding control register bit. An external 4.7 K Ω pull-up resistor must be connected to this pin. DSTRB - Data Strobe (EPP). Active low; used in EPP mode to denote a data cycle. When the cycle is aborted, DSTRB becomes inactive (high). BUSY_WAIT 35 I INT VDD3 Busy. Set high by the printer when it cannot accept another character. Wait. In EPP mode, the parallel port device uses this active low signal to extend its access cycle. ERR 45 I INT VDD3 Error. Set active low by the printer when it detects an error. INIT 48 O OD14,O14/14 VDD3 Initialize. When low, initializes the printer. This signal is in TRI-STATE after a 1 is loaded into the corresponding control register bit. An external 4.7 K Ω pull-up resistor must be connected to this pin. PD7-0 37-44 I/O INT/O14/14 VDD3 Parallel Port Data. Transfers data to and from the peripheral data bus and the appropriate parallel port data register. These signals have a high current drive capability. PE 34 I INT VDD3 Paper End. Set high by the printer when it is out of paper. This pin has an internal weak pull-up or pull-down resistor. SLCT 33 I INT VDD3 Select. Set active high by the printer when the printer is selected. SLIN_ASTRB 47 O OD14,O14/14 VDD3 SLIN - Select Input. When low, selects the printer. This signal is in TRI-STATE after a 0 is loaded into the corresponding control register bit. An external 4.7 K Ω pull-up resistor must be connected to this pin. ASTRB - Address Strobe (EPP). Active low, used in EPP mode to denote an address cycle. When the cycle is aborted, ASTRB becomes inactive (high). Signal Pin(s) I/O Buffer Type Power Well Description Winbond Electronics Corp. Advanced PC Product Center |
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