P83CL580 datasheet(8/80 Pages) PHILIPS

8 / 80 page

1997 Mar 14

Philips Semiconductors

Product speciﬁcation

Low voltage 8-bit microcontrollers with

UART, I2C-bus and ADC

P80CL580; P83CL580

7.2

Pin description

Table 1

Pin description for VSO56 (SOT190-1) and QFP64 (SOT319-2)

For more extensive description of the port pins see Chapter 10 “I/O facilities”.

SYMBOL

DESCRIPTION

VSO56

QFP64

ADC3 to ADC0

1 to 4

59 to 62

4 input channels to the ADC.

Vref(p)(A)

Positive potential of analog-to-digital conversion reference resistor.

VSSA

Analog part ground.

P4.0 to P4.7

7 to 14

1, 2, 4 to 8,

Port 4: 8-bit bidirectional I/O port. (P4.0 to P4.7). Port pins that have

logic 1s written to them are pulled HIGH by internal pull-ups, and in this

state can be used as inputs. As inputs, Port 4 pins that are externally

pulled LOW will source current (IIL, see Chapter 23) due to the internal

pull-ups. Port 4 output buffers can sink/source 4 LS TTL loads.

RST

Reset: a HIGH level on this pin for two machine cycles while the

oscillator is running resets the device.

P1.0/INT2/T2

• Port 1: 8-bit bidirectional I/O port (P1.0 to P1.7). Same characteristics

as Port 4, but note that P1.6 and P1.7 are open-drain only.

• Alternative functions:

– INT2 to INT8 are external interrupt inputs

– STADC is the external trigger of the analog-to-digital converter

– T2 and T2EX are the Timer/event counter 2 inputs

– SCL and SDA are the I2C-bus clock and data lines.

P1.1/INT3/T2EX

P1.2/INT4/STADC

P1.3/INT5

P1.4/INT6

P1.5/INT7

P1.6/INT8/SCL

P1.7/SDA

PWM0

Pulse Width Modulation output 0.

EWN

Enable Watchdog Timer: enable for Watchdog Timer and enable

Power-down mode.

XTAL2

Crystal oscillator output: output of the inverting ampliﬁer of the

oscillator. Left open when external clock is used.

XTAL1

Crystal oscillator input: input to the inverting ampliﬁer of the oscillator,

also the input for an externally generated clock source.

VSS

Ground: circuit ground potential.

P3.0/RXD

• Port 3: 8-bit bidirectional I/O port (P3.0 to P3.7).

Same characteristics as Port 4

• Alternative functions:

– RXD is the UART serial data input (asynchronous) or data

input/output (synchronous)

– TXD is the UART serial data output (asynchronous) or clock output

(synchronous)

–INT0 and INT1 are external interrupts 0 and 1

– T0 and T1 are external inputs for timers 0 and 1.

P3.1/TXD

P3.2/INT0

P3.3/INT1

P3.4/T0

P3.5/T1

P3.6/WR

P3.7/RD

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