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UT80C196 Datasheet(PDF) 9 Page - Aeroflex Circuit Technology |
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UT80C196 Datasheet(HTML) 9 Page - Aeroflex Circuit Technology |
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9 / 42 page  9 Table 9: External I/O Reset State External I/O I/O Function After Reset I/O State During Reset I/O State After Reset Address/Data Bus (AD15:0) Address/Data Bus Pulled High Driven Output ALE ADV ALE Pulled High Driven Output RD RD Pulled High Driven Output WR WRL WR Pulled High Driven Output Port 0 (P0.0-P0.3; P0.6) ECB(4:0) [P0.0-P0.3; P0.6] and ECB(4:0) Undefined Inputs 1 Undefined I/O1, 2 Port 0 (P0.4 and P0.5) P0.4 and P0.5 Undefined Inputs 1 Undefined Inputs 1 Port 0 (P0.7) EXTINT P0.7 Undefined Input 1 Undefined Input 1 NMI NMI Pulled Down Pulled Down HSI.0 T2RST HSI.0 Disabled Input1 Disabled Input1 HSI.1 T2CLK HSI.1 Disabled Input 1 Disabled Input 1 HSI.2/HSO.4 Undefined Disabled I/O1 Disabled I/O1 HSI.3/HSO.5 Undefined Disabled I/O1 Disabled I/O1 HSO.0 through HSO.3 HSO.0-HSO.3 Pulled Down Driven Low Outputs Port 1 (P1.0-P1.7) PWM1; PWM2; BREQ; HLDA; HOLD P1.0-P1.7 Pulled Up Pulled Up Port 2 (P2.0) TXD TXD Pulled Up Driven High Output Port 2 (P2.1) RXD RXD Undefined Input 1 Undefined Input 1 Port 2 (P2.2) EXTINT P2.2 and EXTINT Undefined Input1 Undefined Input1 Port 2 (P2.3) T2CLK P2.3 and T2CLK Undefined Input1 Undefined Input1 Port 2 (P2.4) T2RST P2.4 Undefined Input 1 Undefined Input 1 |
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