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Z0861705VSC

NMOS Z8® 8-BIT MCU KEYBOARD CONTROLLER

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PIN FUNCTIONS (Continued)

Port 1 (P17-P10). Port 1 is an 8-bit, byte programmable,

bidirectional, NMOS compatible I/O port. These eight I/O

lines are configured under software control program as a

Z08617 NMOS Z8® 8-BIT MCU

KEYBOARD CONTROLLER

byte input port or as an open-drain output port. When used

as an I/O port, inputs are standard NMOS (Figure 6).

Z8615

8

Port 1

I/O

(Open-Drain Output)

Input

Pad

OEN

Output

Figure 6. Port 1 Configuration

7

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