Z0861705VSC 查看數據表（PDF） - Zilog

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Z0861705VSC

NMOS Z8® 8-BIT MCU KEYBOARD CONTROLLER

Zilog 

Port 2 (P27-P20). Port 2 is an 8-bit, bit programmable, bi-

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

lines are configured under the software control program

for I/O. Port 2 can be programmed as bit-by-bit indepen-

dently, as input or output, or configured to provide open-

Z08617 NMOS Z8® 8-BIT MCU

KEYBOARD CONTROLLER

drain outputs (Figure 7). P26 and P27 have 2.4 Kohms

(± 25%) pull-up resistors and are capable of sourcing

2.4 mA. P24 and P25 have 10.4 Kohms (± 35%) pull-up

when configured as inputs.

Z8615

Port 2

(I/O)

OEN

Open-Drain

(a) Ports P20-P23

Pad

OUT

Input

IN

OEN

Open-Drain

(b) Ports P24-P25

OUT

IN

Input

10.4 Kohms

Pad

OEN

Open-Drain

(c) Ports P26-P27

OUT

Input

2.4 Kohms

Pad

IN

Figure 7. Port 2 Configuration

8

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