P89LPC922FDH NXP Semiconductors, P89LPC922FDH Datasheet - Page 19
P89LPC922FDH
Manufacturer Part Number
P89LPC922FDH
Description
MCU 8-Bit 89LP 80C51 CISC 8KB Flash 2.5V/3.3V 20-Pin TSSOP Tube
Manufacturer
NXP Semiconductors
Datasheet
1.P89LPC9221FDH512.pdf
(46 pages)
Specifications of P89LPC922FDH
Package
20TSSOP
Device Core
80C51
Family Name
89LP
Maximum Speed
18 MHz
Ram Size
256 Byte
Program Memory Size
8 KB
Operating Supply Voltage
2.5|3.3 V
Data Bus Width
8 Bit
Program Memory Type
Flash
Number Of Programmable I/os
18
Interface Type
I2C/UART
Operating Temperature
-40 to 85 °C
Number Of Timers
2
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Philips Semiconductors
9397 750 14469
Product data
Fig 6. Interrupt sources, interrupt enables, and power-down wake-up sources.
(RTCCON.1)
WDOVF
ERTC
RTCF
8.12.1 Port configurations
8.12 I/O ports
The P89LPC920/921/922/9221 has three I/O ports: Port 0, Port 1, and Port 3. Ports 0
and 1 are 8-bit ports, and Port 3 is a 2-bit port. The exact number of I/O pins available
depend upon the clock and reset options chosen, as shown in
Table 6:
[1]
All but three I/O port pins on the P89LPC920/921/922/9221 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.
P1.5 (RST) can only be an input and cannot be configured.
Clock source
On-chip oscillator or
watchdog oscillator
External clock input
Low/medium/high
speed oscillator
(external crystal or
resonator)
Required for operation above 12 MHz.
EA (IE0.7)
TI & RI/RI
EWDRT
ES/ESR
CMF2
CMF1
EKBI
KBIF
EI2C
BOF
EBO
EX0
EX1
EST
ET0
ET1
TF0
TF1
IE0
IE1
EC
SI
Number of I/O pins available
TI
Rev. 08 — 15 December 2004
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
P89LPC920/921/922/9221
8-bit microcontrollers with two-clock 80C51 core
[1]
[1]
[1]
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
002aaa418
Number of I/O pins
(20-pin package)
18
17
17
16
16
15
INTERRUPT
TO CPU
WAKE-UP
(IF IN POWER-DOWN)
Table
6.
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