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8XC196KC20 数据表(PDF) 8 Page - Intel Corporation |
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8XC196KC20 数据表(HTML) 8 Page - Intel Corporation |
8 / 25 page 8XC196KC8XC196KC20 PIN DESCRIPTIONS (Continued) Symbol Name and Function Ports 3 and 4 8-bit bidirectional IO ports with open drain outputs These pins are shared with the multiplexed addressdata bus which has strong internal pullups HOLD Bus Hold input requesting control of the bus HLDA Bus Hold acknowledge output indicating release of the bus BREQ Bus Request output activated when the bus controller has a pending external memory cycle PMODE Determines the EPROM programming mode PACT A low signal in Auto Programming mode indicates that programming is in process A high signal indicates programming is complete CPVER Cummulative Program Output Verification Pin is high if all locations have programmed correctly since entering a programming mode PALE A falling edge in Slave Programming Mode and Auto Configuration Byte Programming Mode indicates that ports 3 and 4 contain valid programming addresscommand information (input to slave) PROG A falling edge in Slave Programming Mode indicates that ports 3 and 4 contain valid programming data (input to slave) PVER A high signal in Slave Programmig Mode and Auto Configuration Byte Programming Mode indicates the byte programmed correctly AINC Auto Increment Active low input signal indicates that the auto increment mode is enabled Auto Increment will allow reading or writing of sequential EPROM locations without address transactions across the PBUS for each read or write 8 |
类似零件编号 - 8XC196KC20 |
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类似说明 - 8XC196KC20 |
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