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EM78P372KSS20 Datasheet(PDF) 44 Page - ELAN Microelectronics Corp |
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EM78P372KSS20 Datasheet(HTML) 44 Page - ELAN Microelectronics Corp |
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44 / 118 page  EM78P372K 8-bit Microcontroller 36 Product Specification (V1.4) 05.11.2016 (This specification is subject to change without prior notice) 7.4 I/O Ports The I/O registers (Port 5, Port 6, and Port 7) are bidirectional tri-state I/O ports. Port 5 is pulled-high and pulled-down internally by software. Likewise, P6 has its open-drain output set through software. Port 5 features an input status changed interrupt (or wake-up) function. Each I/O pin can be defined as "input" or "output" pin by the I/O control register (IOC5 ~ IOC7). The I/O registers and I/O control registers are both readable and writable. The I/O interface circuits for Port 5, Port 6, and Port 7 are illustrated in Figures 7-7, 7-8, 7-9, and 7-10. M U X PORT PCWR PDWR IOD PDRD 0 1 PCRD D D Q Q Q Q _ _ C L C L P R CLK CLK P R Note: Pull-high and Open-drain are not shown in the figure. Figure 7-7 I/O Port and I/O Control Register Circuit for Port 6 and Port 7 PCRD IOD PCWR PDWR PDRD Bit 6 of IOCE0 PORT M U X 0 1 CLK CLK CLK P P P R R R C L L L C C Q Q Q Q Q Q D D D _ _ _ INT Note: Pull-high and Open-drain are not shown in the figure. Figure 7-8 I/O Port and I/O Control Register Circuit for P60 (/INT) |
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