P89LPC954 datasheet(13/69 Pages) NXP

13 / 69 page

P89LPC952_954_4

Product data sheet

Rev. 04 — 24 July 2008

13 of 69

NXP Semiconductors

P89LPC952/954

8-bit microcontroller with 10-bit ADC

[1]

Input/output for P1.0 to P1.4, P1.6, P1.7. Input for P1.5.

P4.4

I/O

P4.4 — Port 4 bit 4.

P4.5/TDI

I/O

P4.5 — Port 4 bit 5.

I/O

TDI — Serial data input/output for debugger interface.

P4.6

I/O

P4.6 — Port 4 bit 6.

P4.7/TCLK

I/O

P4.7 — Port 4 bit 7.

TCLK — Serial clock input for debugger 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 11 “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. High current source.

P5.1

I/O

P5.1 — Port 5 bit 1. High current source.

P5.2

I/O

P5.2 — Port 5 bit 2. High current source.

P5.3

I/O

P5.3 — Port 5 bit 3. High current source.

P5.4

I/O

P5.4 — Port 5 bit 4. High current source.

P5.5

I/O

P5.5 — Port 5 bit 5. High current source.

P5.6

I/O

P5.6 — Port 5 bit 6. High current source.

P5.7

I/O

P5.7 — Port 5 bit 7. High current source.

VSS

17, 45

3, 22

16, 41

Ground: 0 V reference.

VREFN

negative ADC reference voltage

VDD

8, 32

13, 36

7, 30

Power supply: This is the power supply voltage for normal

operation as well as Idle and Power-down modes.

VREFP

positive ADC reference voltage

Table 3.

Pin description …continued

Symbol

Type Description

LQFP48

PLCC44

LQFP44

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