P89LPC9321FN NXP Semiconductors, P89LPC9321FN Datasheet - Page 8

• Manufacturer Part Number: P89LPC9321FN
• Description: MCU 8-Bit 89LP 80C51 CISC 8KB Flash 2.5V/3.3V 28-Pin PDIP Tube
• Manufacturer: NXP Semiconductors

NXP Semiconductors
Table 3.
P89LPC9321_1
Product data sheet
Symbol
P0.0 to P0.7
P0.0/CMP2/
KBI0
P0.1/CIN2B/
KBI1
P0.2/CIN2A/
KBI2
P0.3/CIN1B/
KBI3
P0.4/CIN1A/
KBI4
P0.5/CMPREF/
KBI5
Pin description
6.2 Pin description
Pin
3
26
25
24
23
22
Type Description
I/O
I/O
O
I
I/O
I
I
I/O
I
I
I/O
I
I
I/O
I
I
I/O
I
I
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
Section 7.16.1 “Port configurations”
details.
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.
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.
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.
Rev. 01 — 9 December 2008
8-bit microcontroller with accelerated two-clock 80C51 core
and
Table 10 “Static characteristics”
P89LPC9321
© NXP B.V. 2008. All rights reserved.
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