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W83877ATD Datasheet(PDF) 11 Page - Winbond |
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W83877ATD Datasheet(HTML) 11 Page - Winbond |
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11 / 47 page  W83877ATF Publication Release Date: April 1998 - 7 - Version 0.51 1.1 Host Interface, continued SYMBOL PIN I/O FUNCTION IRQ_H 91 OUT12t Interrupt request signal H. IRSL2 OUT12t IR module mode selection 2. DACK_D INts DMA acknowledge signal D. SERIRQ OUT12t Serial Interrupt output, when the function of the serial IRQ is set to logic 1 defined in the CR31.bit2 (IRQMODS). CLKIN 7 INt 24MHz/48MHZ clock input. CLKINSEL bit in CR2C register should be correctly reset/set according to the input frequency. SMI 8 OUT12t For the power management, the SMI is and active low by the power management events, that generate an nSCI in ACPI mode. 1.2 Serial Port Interface SYMBOL PIN I/O FUNCTION CTSA 34 INt Clear To Send is the modem control input. CTSB 47 INt Clear To Send is the modem control input. A12 INt System address bus bit 12, when 16-bit address decoder is selected, that is, nEN16SA (CR16.bit6) is set to logic 0. DSRA 33 INt Data Set Ready. An active low indicates the modem or data set is ready to establish a communication link and transfer data to the UART. DSRB 48 INt Data Set Ready. An active low indicates the modem or data set is ready to establish a communication link and transfer data to the UART. A13 INt System address bus bit 13, when 16-bit address decoder is selected. DCDA 32 INt Data Carrier Detect. An active low indicates the modem or data set has detected a data carrier. DCDB 49 INt Data Carrier Detect. An active low indicates the modem or data set has detected a data carrier. A14 INt System address bus bit 14, when 16-bit address decoder is selected. RIA 31 INt Ring Indicator. An active low indicates that a ring signal is being received by the modem or data set. |
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