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Z86C9620VSC Datasheet(PDF) 18 Page - Zilog, Inc. |
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Z86C9620VSC Datasheet(HTML) 18 Page - Zilog, Inc. |
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18 / 46 page  18 Z86C61/62/96 Z8® MICROCONTROLLER PIN FUNCTIONS (Continued) Port 4 (P47-P40). Port 4 is an 8-bit, bit programmable, bidirectional, CMOS compatible port. Each of these eight I/O lines can be independently programmed as an input or output or globally as an open-drain output. Port 4 is always available for I/O operation (Figure 15). Port address (F)02. Port 5 (P57-P50). Same as Port 4. Port address (F)04. Port 6 (P63-P60). Same as Port 4. (Note: this is a 4-bit port, bits D3-D0.) Port address (F)07. Auto Latch. The Auto Latch puts valid CMOS levels on all CMOS inputs that are not externally driven. This reduces excessive supply current flow in the input buffer when it is not being driven by any source. OEN Out In PAD Port 4 (I/O) MCU TTL Level Shifter Auto Latch R ≈ 500 KΩ Open-Drain Figure 15. Port 4 Configuration |
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