P89LPC952FBD datasheet(11/66 Pages) PHILIPS

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9397 750 14716

Preliminary data sheet

Rev. 01— 16 September 2005

11 of 66

Philips Semiconductors

P89LPC952

8-bit microcontroller with 10-bit ADC

P3.1/XTAL1

I/O

P3.1 — Port 3 bit 1.

XTAL1 — Input to the oscillator circuit and internal clock generator

circuits (when selected via the ﬂash conﬁguration). It can be a port pin if

internal RC oscillator or watchdog oscillator is used as the CPU clock

source, and if XTAL1/XTAL2 are not used to generate the clock for the

RTC/system timer.

P4.0 to P4.7

I/O

Port 4: Port 4 is an 8-bit I/O port with a user-conﬁgurable output type.

During reset Port 4 latches are conﬁgured in the input only mode with the

internal pull-up disabled. The operation of Port 4 pins as inputs and

outputs depends upon the port conﬁguration selected. Each port pin is

conﬁgured independently. Refer to Section 7.13.1 “Port conﬁgurations”

and Table 10 “Static characteristics” for details.

All pins have Schmitt triggered inputs.

Port 4 also provides various special functions as described below:

P4.0

I/O

P4.0 — Port 4 bit 0.

P4.1/TRIG

I/O

P4.1 — Port 4 bit 1.

TRIG — JTAG trigger output.

P4.2/TXD1

I/O

P4.2 — Port 4 bit 2.

TXD1 — Transmitter output for serial port 1.

P4.3/RXD1

I/O

P4.3 — Port 4 bit 3.

RXD1 — Receiver input for serial port 1.

P4.4

I/O

P4.4 — Port 4 bit 4.

P4.5/SDAT

I/O

P4.5 — Port 4 bit 5.

I/O

SDAT — Serial data input/output for JTAG interface.

P4.6

I/O

P4.6 — Port 4 bit 6.

P4.7/SCLK

I/O

P4.7 — Port 4 bit 7.

SCLK — Serial clock input for JTAG interface.

P5.0 to P5.7

I/O

Port 5: Port 5 is an 8-bit I/O port with a user-conﬁgurable output type.

During reset Port 5 latches are conﬁgured in the input only mode with the

internal pull-up disabled. The operation of Port 5 pins as inputs and

outputs depends upon the port conﬁguration selected. Each port pin is

conﬁgured independently. Refer to Section 7.13.1 “Port conﬁgurations”

and Table 10 “Static characteristics” for details.

All pins have Schmitt triggered inputs.

Port 5 also provides various special functions as described below:

P5.0

I/O

P5.0 — Port 5 bit 0.

P5.1

I/O

P5.1 — Port 5 bit 1.

P5.2

I/O

P5.2 — Port 5 bit 2.

P5.3

I/O

P5.3 — Port 5 bit 3.

P5.4

I/O

P5.4 — Port 5 bit 4.

P5.5

I/O

P5.5 — Port 5 bit 5.

P5.6

I/O

P5.6 — Port 5 bit 6.

P5.7

I/O

P5.7 — Port 5 bit 7.

VSS

Ground: 0 V reference.

Table 3:

Pin description …continued

Symbol

Type Description

PLCC44

LQFP44

P89LPC952FBD 数据表(PDF) 11 Page - NXP Semiconductors

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