P89LPC9321 NXP Semiconductors, P89LPC9321 Datasheet - Page 10

• Manufacturer Part Number: P89LPC9321
• Description: The P89LPC9321 is a single-chip microcontroller, available in low cost packages, basedon a high performance processor architecture that executes instructions in two to fourclocks, six times the rate of standard 80C51 devices
• Manufacturer: NXP Semiconductors

NXP Semiconductors
Table 3.
[1]
P89LPC9321
Product data sheet
Symbol
P2.0/ICB
P2.1/OCD
P2.2/MOSI
P2.3/MISO
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
1
2
13
14
15
16
27
28
9
8
7
21
…continued
Type Description
I/O
I
I/O
O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
I/O
I
I/O
I/O
O
O
I/O
I
I
I
P2.0 — Port 2 bit 0.
ICB — Input Capture B.
P2.1 — Port 2 bit 1.
OCD — Output Compare D.
P2.2 — Port 2 bit 2.
MOSI — SPI master out slave in. When configured as master, this pin is output;
when configured as slave, this pin is input.
P2.3 — Port 2 bit 3.
MISO — When configured as master, this pin is input, when configured as slave,
this pin is output.
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
7.16.1 “Port configurations”
All pins have Schmitt trigger 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.
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 16 November 2010
8-bit microcontroller with accelerated two-clock 80C51 core
and
Table 10 “Static characteristics”
P89LPC9321
© NXP B.V. 2010. All rights reserved.
for details.
Section
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