P89LPC938 NXP Semiconductors, P89LPC938 Datasheet - Page 4

• Manufacturer Part Number: P89LPC938
• Description: The P89LPC938 is a single-chip microcontroller, available in low cost packages, based ona high performance processor architecture that executes instructions in two to four clocks,six times the rate of standard 80C51 devices
• Manufacturer: NXP Semiconductors

Philips Semiconductors
4. Block diagram
9397 750 14051
Product data sheet
Fig 1. Block diagram.
RESONATOR
P3[1:0]
P2[7:0]
P1[7:0]
P0[7:0]
CRYSTAL
OR
X1
X2
P89LPC938
OSCILLATOR DIVIDER
CONFIGURABLE I/Os
CONFIGURABLE I/Os
CONFIGURABLE I/Os
CONFIGURABLE I/Os
WATCHDOG TIMER
PROGRAMMABLE
AND OSCILLATOR
CONFIGURABLE
AUXILIARY RAM
DATA EEPROM
CODE FLASH
OSCILLATOR
INTERRUPT
DATA RAM
256-BYTE
512-BYTE
512-BYTE
KEYPAD
PORT 3
PORT 2
PORT 1
PORT 0
8 kB
ACCELERATED 2-CLOCK 80C51 CPU
Rev. 01 — 25 February 2005
internal
CPU
clock
OSCILLATOR
bus
ON-CHIP
RC
8-bit microcontroller with 10-bit A/D converter
(POWER-ON RESET,
BROWNOUT RESET)
POWER MONITOR
REAL-TIME CLOCK/
CCU (CAPTURE/
COMPARE UNIT)
SYSTEM TIMER
COMPARATORS
ANALOG
TIMER 0
TIMER 1
I
2
UART
ADC0
C-BUS
SPI
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
002aab106
P89LPC938
MOSI
SS
TXD
RXD
SCL
SDA
SPICLK
MISO
T0
T1
CMP2
CIN2A
CIN1A
OCA
OCC
ICA
AD00
AD02
AD04
AD06
CIN2B
CMP1
CIN1B
OCB
OCD
ICB
AD01
AD03
AD05
AD07
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