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PDF P89LPC938 Data sheet ( Hoja de datos )
| Número de pieza | P89LPC938 | |
| Descripción | 8-bit microcontroller | |
| Fabricantes | NXP Semiconductors | |
| Logotipo |  |
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P89LPC938
8-bit microcontroller with accelerated two-clock 80C51 core
8 kB 3 V byte-erasable Flash with 10-bit A/D converter
Rev. 01 — 25 February 2005
Product data sheet
1. General description
The P89LPC938 is a single-chip microcontroller, available in low cost packages, based on
a high performance processor architecture that executes instructions in two to four clocks,
six times the rate of standard 80C51 devices. Many system-level functions have been
incorporated into the P89LPC938 in order to reduce component count, board space, and
system cost.
2. Features
2.1 Principal features
s 8 kB byte-erasable Flash code memory organized into 1 kB sectors and 64-byte
pages. Single-byte erasing allows any byte(s) to be used as non-volatile data storage.
s 256-byte RAM data memory and a 512-byte auxiliary on-chip RAM.
s 512-byte customer Data EEPROM on chip allows serialization of devices, storage of
set-up parameters, etc.
s 8-input multiplexed 10-bit A/D converter. Two analog comparators with selectable
inputs and reference source.
s Two 16-bit counter/timers (each may be configured to toggle a port output upon timer
overflow or to become a PWM output) and a 23-bit system timer that can also be used
as a RTC.
s Enhanced UART with fractional baud rate generator, break detect, framing error
detection, and automatic address detection; 400 kHz byte-wide I2C-bus
communication port and SPI communication port.
s CCU provides PWM, input capture, and output compare functions.
s High-accuracy internal RC oscillator option allows operation without external oscillator
components. The RC oscillator option is selectable and fine tunable.
s 2.4 V to 3.6 V VDD operating range. I/O pins are 5 V tolerant (may be pulled up or
driven to 5.5 V).
s 28-pin TSSOP, PLCC, and HVQFN packages with 23 I/O pins minimum and up to 26
I/O pins while using on-chip oscillator and reset options.
1 page  
Philips Semiconductors
5. Functional diagram
P89LPC938
8-bit microcontroller with 10-bit A/D converter
AD05
AD00
AD01
AD02
AD03
KBI0
KBI1
KBI2
KBI3
KBI4
KBI5
KBI6
KBI7
CLKOUT
CMP2
CIN2B
CIN2A
CIN1B
CIN1A
CMPREF
CMP1
T1
XTAL2
XTAL1
PORT 0
PORT 3
Fig 2. P89LPC938 functional diagram.
VDD VSS
P89LPC938
002aab075
PORT 1
PORT 2
TXD
RXD
T0
INT0
INT1
RST
OCB
OCC
SCL
SDA
AD04
ICB
OCD
MOSI
MISO
SS
SPICLK
OCA
ICA
AD07
AD06
9397 750 14051
Product data sheet
Rev. 01 — 25 February 2005
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
5 of 68
5 Page 
Philips Semiconductors
P89LPC938
8-bit microcontroller with 10-bit A/D converter
7. Functional description
Remark: Please refer to the P89LPC938 User’s Manual for a more detailed functional
description.
7.1 Special function registers
Remark: SFR accesses are restricted in the following ways:
• User must not attempt to access any SFR locations not defined.
• Accesses to any defined SFR locations must be strictly for the functions for the SFRs.
• SFR bits labeled ‘-’, ‘0’ or ‘1’ can only be written and read as follows:
– ‘-’ Unless otherwise specified, must be written with ‘0’, but can return any value
when read (even if it was written with ‘0’). It is a reserved bit and may be used in
future derivatives.
– ‘0’ must be written with ‘0’, and will return a ‘0’ when read.
– ‘1’ must be written with ‘1’, and will return a ‘1’ when read.
9397 750 14051
Product data sheet
Rev. 01 — 25 February 2005
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
11 of 68
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| PDF Descargar | [ Datasheet P89LPC938.PDF ] | |
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