p89lpc972fn NXP Semiconductors, p89lpc972fn Datasheet - Page 7

• Manufacturer Part Number: p89lpc972fn
• Description: 8-bit Microcontroller With Accelerated Two-clock 80c51 Core 2kb/4 Kb/8 Kb Wide-voltage Byte-erasable ?ash
• Manufacturer: NXP Semiconductors

NXP Semiconductors
Table 3.
P89LPC97X_1
Preliminary data sheet
Symbol
P0.0 to P0.7
P0.0/CMP2/KBI0/
SPICLK
P0.1/CIN2B/
KBI1
P0.2/CIN2A/
KBI2
P0.3/CIN1B/
KBI3/T2
P0.4/CIN1A/
KBI4
P0.5/CMPREF/
KBI5/T3
Pin description
6.2 Pin description
Pin
DIP20,
TSSOP20
1
20
19
18
17
16
Type Description
I/O
I/O
O
I
I/O
I/O
I
I
I/O
I
I
I/O
I
I
I/O
I/O
I
I
I/O
I
I
I/O
Port 0: Port 0 is an 8-bit I/O port with a user-configurable output type. During reset
Port 0 latches are configured in the input-only mode with the internal pull-up
disabled. The operation of Port 0 pins as inputs and outputs depends upon the port
configuration selected. Each port pin is configured independently. Refer to
7.16.1 “Port configurations”
The Keypad Interrupt feature operates with Port 0 pins.
All pins have Schmitt trigger inputs.
Port 0 also provides various special functions as described below:
P0.0 — Port 0 bit 0.
CMP2 — Comparator 2 output
KBI0 — Keyboard input 0.
SPICLK — SPI clock. When configured as master, this pin is output; when
configured as slave, this pin is input (pin remap).
P0.1 — Port 0 bit 1.
CIN2B — Comparator 2 positive input B.
KBI1 — Keyboard input 1.
P0.2 — Port 0 bit 2.
CIN2A — Comparator 2 positive input A.
KBI2 — Keyboard input 2.
P0.3 — Port 0 bit 3. High current source.
CIN1B — Comparator 1 positive input B.
KBI3 — Keyboard input 3.
T2 — Timer/counter 2 external count input or overflow output.
P0.4 — Port 0 bit 4. High current source.
CIN1A — Comparator 1 positive input A.
KBI4 — Keyboard input 4.
P0.5 — Port 0 bit 5. High current source.
CMPREF — Comparator reference (negative) input.
KBI5 — Keyboard input 5.
T3 — Timer/counter 3 external count input or overflow output.
Rev. 01 — 17 December 2009
8-bit microcontroller with accelerated two-clock 80C51 core
and
Table 11 “Static characteristics”
P89LPC970/971/972
© NXP B.V. 2009. All rights reserved.
for details.
Section
7 of 65