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T89C51CC02 Datasheet(PDF) 5 Page - ATMEL Corporation

No. de Pieza. T89C51CC02
Descripción  Enhanced 8-bit Microcontroller with CAN Controller and Flash
Descarga  156 Pages
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Fabricante  ATMEL [ATMEL Corporation]
Página de inicio  http://www.atmel.com
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T89C51CC02 Datasheet(HTML) 5 Page - ATMEL Corporation

 
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AT/T89C51CC02
4126J–CAN–05/06
Pin Description
Pin Name
Type
Description
VSS
GND
Circuit ground
VCC
Supply Voltage
VAREF
Reference Voltage for ADC (input)
VAVCC
Supply Voltage for ADC
VAGND
Reference Ground for ADC (internaly connected with the VSS)
P1.0:7
I/O
Port 1:
Is an 8-bit bi-directional I/O port with internal pull-ups. Port 1 pins can be used for digital input/output or as
analog inputs for the Analog Digital Converter (ADC). Port 1 pins that have 1’s written to them are pulled
high by the internal pull-up transistors and can be used as inputs in this state. As inputs, Port 1 pins that
are being pulled low externally will be the source of current (IIL, See section ’Electrical Characteristic’)
because of the internal pull-ups. Port 1 pins are assigned to be used as analog inputs via the ADCCF
register (in this case the internal pull-ups are disconnected).
As a secondary digital function, port 1 contains the Timer 2 external trigger and clock input; the PCA
external clock input and the PCA module I/O.
P1.0/AN0/T2
Analog input channel 0,
External clock input for Timer/counter2.
P1.1/AN1/T2EX
Analog input channel 1,
Trigger input for Timer/counter2.
P1.2/AN2/ECI
Analog input channel 2,
PCA external clock input.
P1.3/AN3/CEX0
Analog input channel 3,
PCA module 0 Entry of input/PWM output.
P1.4/AN4/CEX1
Analog input channel 4,
PCA module 1 Entry of input/PWM output.
P1.5/AN5
Analog input channel 5,
P1.6/AN6
Analog input channel 6,
P1.7/AN7
Analog input channel 7,
It can drive CMOS inputs without external pull-ups.
P2.0:1
I/O
Port 2:
Is an 2-bit bi-directional I/O port with internal pull-ups. Port 2 pins that have 1’s written to them are pulled
high by the internal pull-ups and can be used as inputs in this state. As inputs, Port 2 pins that are being
pulled low externally will be a source of current (IIL, on the datasheet) because of the internal pull-ups.
In the T89C51CC02 Port 2 can sink or source 5mA. It can drive CMOS inputs without external pull-ups.


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