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AT83C5111 데이터시트(PDF) 20 Page - ATMEL Corporation

부품명 AT83C5111
상세설명  Low Pin Count 8-bit Microcontroller with A/D Converter
PDF  86 Pages
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제조업체  ATMEL [ATMEL Corporation]
홈페이지  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT83C5111 데이터시트(HTML) 20 Page - ATMEL Corporation

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AT8xC5111
4190A–8051–11/02
Figure 3. Push-pull Output
Input Only Configuration
The input only configuration is a pure input with neither pull-up nor pull-down.
The input only configuration is shown in Figure 5.
Figure 4. Input only
Ports Description
Ports P1, P3 and P4
Every output on the AT8xC5111 may potentially be used as a 20 mA sink LED drive out-
put. However, there is a maximum total output current for all ports which must not be
exceeded. All port pins of the AT8xC5111 have slew rate controlled outputs. This is to
limit noise generated by quickly switching output signals. The slew rate is factory set to
approximately 10 ns rise and fall times.
The inputs of each I/O port of the AT8xC5111 are TTL level Schmitt triggers with
hysteresis.
Ports P0 and P2
The high pin-count version of the AT8xC5111 has standard address and data ports P0
and P2. These ports are standard C51 ports (Quasi bi-directional I/O). The control lines
are provided on the pins: ALE, PSEN, EA, Reset; RD and WR signals are on the bits
P1.1 and P1.0 .
Input
Pin
Strong
N
P
Port latch
Data
Data
Input
Pin
Data



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