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ST78C36A Datasheet(PDF) 4 Page - Exar Corporation |
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ST78C36A Datasheet(HTML) 4 Page - Exar Corporation |
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4 / 27 page  ST78C36/36A 4 ECP/EPP PARALLEL PRINTER PORT WITH 16-BYTE FIFO REV. 5.1.0 PRINTER PORT INTERFACE PD7 PD6 PD5 PD4 PD3 PD2 PD1 PD0 38 37 36 35 34 33 32 31 45 44 43 42 41 40 39 38 I/O Bi-directional parallel port (three-state) to transfer data in or out of the ST78C36 parallel port. PD[7:0] are latched during output mode. Output only for SPP and PPF modes, bi-directional for all other modes. -STROBE 25 27 O Data strobe output (internal pull-up / three stated active low). This output indicates to the printer that valid data is available at the printer port (PD0- PD7). -AUTOFDX 26 28 O Automatic line feed (internal pull-up / three stated active low). When this signal is low the printer should automatically line feed after each line is printed. INIT 27 29 O Initialize line printer (internal pull-up / three stated active low). When this signal is low, it causes the printer to be initialized. -SLCTIN 28 30 O Line printer select (internal pull-up / three stated active low). When this signal is low, it selects the printer. -ERROR 1 57 I Line printer error (internal pull-up / active low). This is an output from the printer to indicate an error by holding it low during error condition. SLCT 2 58 I Line printer selected (internal pull-up / active high). This is an output from the printer to indicate that the line printer has been selected. BUSY 3 59 I Line printer busy (internal pull-up / active high). An output from the printer to indicate printer is not ready to accept data. -ACK 4 60 I Line printer acknowledge (internal pull-up / active low). This input is pulsed low by the printer to indicate that data has been accepted success- fully. PE 5 61 I Line printer paper empty (internal pull-up / active high). An output from the printer to indicate out of paper. PDIR 21 23 O Printer port direction indicator. HIGH indicates device is in input mode, LOW indicates output mode. (ST78C36CJ44 and ST78C36CQ64 only). SYSTEM SIGNALS CLOCK/ XTAL1 20 21 I Crystal oscillator input (ST78C36ACJ44, ST78C36CQ64) or External clock input (ST78C36CJ44), nominal 24 MHz. XTAL2 21 22 O Crystal oscillator output, nominal 24 MHz. ST78C36ACJ44 and ST78C36CQ64 only. RESET 24 26 I System RESET (active HIGH). PIN DESCRIPTION NAME 44-PLCC PIN # 64-LQFP PIN # TYPE DESCRIPTION |
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Similar Description - ST78C36A |
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