P89LPC930 datasheet(8/55 Pages) PHILIPS

8 / 55 page

Philips Semiconductors

P89LPC930/931

8-bit microcontrollers with two-clock 80C51 core

Product data

Rev. 05 — 15 December 2004

8 of 55

9397 750 14472

P2.0 - P2.7

1, 2, 13,

14, 15, 16,

27, 28

I/O

Port 2: Port 2 is a 8-bit I/O port with a user-conﬁgurable output type. During reset

Port 2 latches are conﬁgured in the input only mode with the internal pull-up disabled.

The operation of port 2 pins as inputs and outputs depends upon the port

conﬁguration selected. Each port pin is conﬁgured independently. Refer to the

section on I/O port conﬁguration and the DC Electrical Characteristics for details.

This port is not available in 20-pin package and is conﬁgured automatically as

outputs to conserve power. The alternate functions for these pins must not be

enabled.

All pins have Schmitt triggered inputs.

Port 2 also provides various special functions as described below.

I/O

P2.0 — Port 2 bit 0.

I/O

P2.1 — Port 2 bit 1.

I/O

P2.2 — Port 2 bit 2.

I/O

MOSI — SPI master out slave in. When conﬁgured as master, this pin is output,

when conﬁgured as slave, this pin is input.

I/O

P2.3 — Port 2 bit 3.

I/O

MISO — SPI master in slave out. When conﬁgured as master, this pin is input, when

conﬁgured as slave, this pin is output.

I/O

P2.4 — Port 2 bit 4.

SS — SPI Slave select.

I/O

P2.5 — Port 2 bit 5.

I/O

SPICLK — SPI clock. When conﬁgured as master, this pin is output, when

conﬁgured as slave, this pin is input.

I/O

P2.6 — Port 2 bit 6.

I/O

P2.7 — Port 2 bit 7.

Table 3:

Pin description…continued

Symbol

Type

Description

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