P89LPC938 NXP Semiconductors, P89LPC938 Datasheet - Page 10

• Manufacturer Part Number: P89LPC938
• Description: The P89LPC938 is a single-chip microcontroller, available in low cost packages, based ona high performance processor architecture that executes instructions in two to four clocks,six times the rate of standard 80C51 devices
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Table 3:
[1]
9397 750 14051
Product data sheet
Symbol
P2.4/SS
P2.5/SPICLK
P2.6/OCA
P2.7/ICA
P3.0 to P3.1
P3.0/XTAL2/
CLKOUT
P3.1/XTAL1
V
V
SS
DD
Input/Output for P1.0 to P1.4, P1.6, P1.7. Input for P1.5.
Pin description
Pin
TSSOP28,
PLCC28
15
16
27
28
9
8
7
21
…continued
HVQFN28
11
12
23
24
5
4
3
17
Type Description
I/O
I
I/O
I/O
I/O
O
I/O
I
I/O
I/O
O
O
I/O
I
I
I
Rev. 01 — 25 February 2005
P2.4 — Port 2 bit 4.
SS — SPI Slave select.
P2.5 — Port 2 bit 5.
SPICLK — SPI clock. When configured as master, this pin is output;
when configured as slave, this pin is input.
P2.6 — Port 2 bit 6.
OCA — Output Compare A.
P2.7 — Port 2 bit 7.
ICA — Input Capture A.
Port 3: Port 3 is a 2-bit I/O port with a user-configurable output type.
During reset Port 3 latches are configured in the input only mode with the
internal pull-up disabled. The operation of Port 3 pins as inputs and
outputs depends upon the port configuration selected. Each port pin is
configured independently. Refer to
and
All pins have Schmitt triggered inputs.
Port 3 also provides various special functions as described below:
P3.0 — Port 3 bit 0.
XTAL2 — Output from the oscillator amplifier (when a crystal oscillator
option is selected via the Flash configuration.
CLKOUT — CPU clock divided by 2 when enabled via SFR bit (ENCLK
-TRIM.6). It can be used if the CPU clock is the internal RC oscillator,
watchdog oscillator or external clock input, except when XTAL1/XTAL2
are used to generate clock source for the RTC/system timer.
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.
Ground: 0 V reference.
Power Supply: This is the power supply voltage for normal operation as
well as Idle and Power-down modes.
Table 10 “DC electrical characteristics”
8-bit microcontroller with 10-bit A/D converter
Section 7.13.1 “Port configurations”
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
for details.
P89LPC938
10 of 68