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Z86L02 датащи(PDF) 16 Page - Zilog, Inc. |
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Z86L02 датащи(HTML) 16 Page - Zilog, Inc. |
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16 / 37 page ![]() Z86C02/E02/L02 Cost Effective, 512-Byte ROM CMOS Z8® Microcontrollers Zilog 16 P R E L I M I N A R Y DS96DZ80301 PIN FUNCTIONS (Continued) XTAL1, XTAL2 Crystal In, Crystal Out (time-based input and output, respectively). These pins connect a parallel- resonant crystal, LC, RC, or an external single-phase clock (8 MHz max) to the on-chip clock oscillator and buff- er. Port 0, P02-P00. Port 0 is a 3-bit bi-directional, Schmitt- triggered CMOS compatible I/O port. These three I/O lines can be globally configured under software control to be in- puts or outputs (Figure 8). Auto Latch. The Auto Latch puts valid CMOS levels on all CMOS inputs (except P33, P32, P31) that are not external- ly driven. A valid CMOS level, rather than a floating node, reduces excessive supply current flow in the input buffer. On Power-up and Reset, the Auto Latch will set the ports to an undetermined state of 0 or 1. Default condition is Auto Latches enabled. Figure 8. Port 0 Configuration Open Out In 1.5 2.3 Hysteresis PAD Port 0 (I/O) Z8 Auto Latch Option R 500 k Ω VCC @ 5.0V |
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