Z86E6320PSC Просмотр технического описания (PDF) - Zilog

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Z86E6320PSC

CMOS Z8® 16K/32K EPROM MICROCONTROLLER

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PIN FUNCTIONS (Continued)

PRELIMINARY

Z86E61/E63 Z8® MCU

WITH 16K/32K EPROM

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

directional, 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 2 is always

available for I/O operation. When used as an I/O port,

Port 2 can be placed under handshake control. In this

configuration, Port 3 lines P31 and P36 are used as the

handshake control lines /DAV2 and RDY2. The handshake

signal assignment for Port 3 lines, P31 and P36, is dictated

by the direction (input or output) assigned to P27

(Figure 8 and Table 5).

Z86E61

/E63

MCU

Open-Drain

OEN

Port 2 (I/O)

Handshake Controls

/DAV2 and RDY2

(P31 and P36)

PAD

Out

TTL Level Shifter

In

R ≈ 500 kΩ

Auto Latch

Figure 8. Port 2 Configuration

10

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