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W83977EF-AW Datasheet(PDF) 15 Page - Winbond |
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W83977EF-AW Datasheet(HTML) 15 Page - Winbond |
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15 / 142 page  W83977EF-AW/W83977EG-AW Publication Release Date: Apr. 2006 -13- Revision 1.2 4.5 Multi-Mode Parallel Port The following pins have alternate functions, which are controlled by CR28 and L3-CRF0. SYMBOL PIN I/O FUNCTION SLCT 18 INt PRINTER MODE: SLCT An active high input on this pin indicates that the printer is selected. This pin is pulled high internally. Refer to description of the parallel port for definition of this pin in ECP and EPP mode. OD12 EXTENSION FDD MODE: WE2# This pin is for Extension FDD B; its function is the same as the WE# pin of FDC. OD12 EXTENSION 2FDD MODE: WE2# This pin is for Extension FDD A and B; it function is the same as the WE# pin of FDC. PE 19 INt PRINTER MODE: PE An active high input on this pin indicates that the printer has detected the end of the paper. This pin is pulled high internally. Refer to description of the parallel port for definition of this pin in ECP and EPP mode. OD12 EXTENSION FDD MODE: WD2# This pin is for Extension FDD B; its function is the same as the WD# pin of FDC. OD12 EXTENSION 2FDD MODE: WD2# This pin is for Extension FDD A and B; its function is the same as the WD# pin of FDC. BUSY 21 INt OD12 OD12 PRINTER MODE: BUSY An active high input indicates that the printer is not ready to receive data. This pin is pulled high internally. Refer to description of the parallel port for definition of this pin in ECP and EPP mode. EXTENSION FDD MODE: MOB2# This pin is for Extension FDD B; the function of this pin is the same as the MOB# pin of FDC. EXTENSION 2FDD MODE:MOB2# This pin is for Extension FDD A and B; the function of this pin is the same as the MOB# pin of FDC. ACK# 22 INt OD12 OD12 PRINTER MODE: ACK# An active low input on this pin indicates that the printer has received data and is ready to accept more data. This pin is pulled high internally. Refer to description of the parallel port for definition of this pin in ECP and EPP mode. EXTENSION FDD MODE: DSB2# This pin is for the Extension FDD B; its functions is the same as the DSB# pin of FDC. EXTENSION 2FDD MODE: DSB2# This pin is for Extension FDD A and B; it functions is the same as the DSB# pin of FDC. |
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