p89lpc9401 NXP Semiconductors, p89lpc9401 Datasheet - Page 21

• Manufacturer Part Number: p89lpc9401
• Description: 8-bit Microcontroller With Accelerated Two-clock 80c51 Core 8 Kb 3 V Byte-erasable Flash With 32 Segment X 4 Lcd Driver
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Table 6:
[1]
P89LPC9401_1
Preliminary data sheet
Clock source
On-chip oscillator or watchdog oscillator
External clock input
Low/medium/high speed oscillator
(external crystal or resonator)
Fig 7. Interrupt sources, interrupt enables, and power-down wake-up sources
Required for operation above 12 MHz.
(RTCCON.1)
Number of I/O pins available
WDOVF
RTCF
ERTC
7.13.1 Port configurations
7.13 I/O ports
The P89LPC9401 has four I/O ports: Port 0 and Port 1 are 8-bit ports. Port 2 is a 5-bit
port. Port 3 is a 2-bit port. The exact number of I/O pins available depends upon the clock
and reset options chosen, as shown in
All but three I/O port pins on the P89LPC9401 may be configured by software to one of
four types on a bit-by-bit basis. These are: quasi-bidirectional (standard 80C51 port
outputs), push-pull, open drain, and input-only. Two configuration registers for each port
select the output type for each port pin.
TI and RI/RI
EA (IE0.7)
ES/ESR
EWDRT
CMF2
CMF1
KBIF
EKBI
EI2C
SPIF
ESPI
8-bit two-clock 80C51 microcontroller with 32 segment
BOF
EBO
EST
EX0
EX1
ET0
ET1
TF0
TF1
IE0
IE1
EC
SI
TI
Reset option
No external reset (except during power-up)
External RST pin supported
No external reset (except during power-up)
External RST pin supported
No external reset (except during power-up)
External RST pin supported
Rev. 01 — 5 September 2005
Table
[1]
[1]
6.
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
002aab464
P89LPC9401
Number of I/O pins
(not including LCD
pins)
23
22
22
21
21
20
interrupt
to CPU
wake-up
(if in power-down)
4 LCD driver
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