Rainbow-electronics T89C5115 Manual de usuario descargar pdf (Pagina 4)

T89C5115

4128A–8051–04/02

Table 1. Pin Description

Pin Name Type Description

VSS GND Circuit ground

VCC Supply Voltage

VAREF Reference Voltage for ADC

VAVCC Supply Voltage for ADC

VAGND Reference Ground for ADC

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 (I

, 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.

P2.0:7 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.

IntheT89C51CC02Port2cansinkorsource5mA.ItcandriveCMOSinputs

without external pull-ups.

1 2 3 4 5 6 7 8 9 ... 104 105

T89C5115 1
4128A–8051–04/02 /xM 105

Comentarios a estos manuales

Sin comentarios

Rainbow-electronics T89C5115 Manual de usuario Pagina 4

Comentarios a estos manuales

Relacionado con productos y manuales para Sensores Rainbow-electronics T89C5115