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T84C5112-RKUEL 데이터시트(PDF) 24 Page - ATMEL Corporation

부품명 T84C5112-RKUEL
상세설명  8-bit Microcontroller with A/D converter
PDF  97 Pages
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제조업체  ATMEL [ATMEL Corporation]
홈페이지  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

T84C5112-RKUEL 데이터시트(HTML) 24 Page - ATMEL Corporation

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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
Pin
Strong
Very
Weak
N
P
P
Weak
P
CLOCK DELAY
Port latch
Data
Data
Input
Pin
N
Port latch
Data
Data



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