T84C5112-RKSCL datasheet(24/97 Pages) ATMEL

No. de pieza	T84C5112-RKSCL

Descripción Electrónicos	8-bit Microcontroller with A/D converter

PDF	97 Pages

Scroll/Zoom	100%

Fabricante Electrónico	ATMEL [ATMEL Corporation]

Página de inicio	http://www.atmel.com

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24 / 97 page

Rev. B - November 10, 2000

Preliminary

T80C5112

Figure 5. Quasi-Bidirectional Output

9.1.2. Open Drain Output Configuration

The open drain output configuration turns off all pull-ups and only drives the pull-down transistor of the port

driver when the port latch contains a logic 0. To be used as a logic output, a port configured in this manner must

have an external pull-up, typically a resistor tied to Vdd. The pull-down for this mode is the same as for the quasi-

bidirectional mode. The open drain port configuration is shown in Figure 6.

Figure 6. Open Drain Output

9.1.3. Push-Pull Output Configuration

The push-pull output configuration has the same pull-down structure as both the open drain and the quasi-bidirectional

output modes, but provides a continuous strong pull-up when the port latch contains a logic 1. The push-pull mode

may be used when more source current is needed from a port output. The push-pull port configuration is shown

in Figure 7.

2 CPU

Input

Strong

Very

Weak

CLOCK DELAY

Port latch

Data

Input

Port latch

Data

T84C5112-RKSCL Datasheet(PDF) 24 Page - ATMEL Corporation