P89LPC952_954_4 © NXP B.V. 2008. All rights reserved.
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 21 26 20 I/O P4.4 — Port 4 bit 4.
P4.5/TDI 20 25 19 I/O P4.5 — Port 4 bit 5.
I/O TDI — Serial data input/output for debugger interface.
P4.6 19 24 18 I/O P4.6 — Port 4 bit 6.
P4.7/TCLK 18 23 17 I/O P4.7 — Port 4 bit 7.
I 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 16 21 15 I/O P5.0 — Port 5 bit 0. High current source.
P5.1 15 20 14 I/O P5.1 — Port 5 bit 1. High current source.
P5.2 14 19 13 I/O P5.2 — Port 5 bit 2. High current source.
P5.3 13 18 12 I/O P5.3 — Port 5 bit 3. High current source.
P5.4 12 17 11 I/O P5.4 — Port 5 bit 4. High current source.
P5.5 11 16 10 I/O P5.5 — Port 5 bit 5. High current source.
P5.6 10 15 9 I/O P5.6 — Port 5 bit 6. High current source.
P5.7 9 14 8 I/O P5.7 — Port 5 bit 7. High current source.
V
SS
17, 45 3, 22 16, 41 I Ground: 0 V reference.
VREFN 44 - - negative ADC reference voltage
V
DD
8, 32 13, 36 7, 30 I Power supply: This is the power supply voltage for normal
operation as well as Idle and Power-down modes.
VREFP 33 - - positive ADC reference voltage
Table 3. Pin description
…continued
Symbol Pin Type Description
LQFP48 PLCC44 LQFP44
