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Philips Semiconductors
P3[1:0]
P2[7:0]
P1[7:0]
P0[7:0]
X1
CRYSTAL
OR
RESONATOR
X2
Fig 4. P89LPC938 block diagram.
User manual
P89LPC938
ACCELERATED 2-CLOCK 80C51 CPU
8 kB
CODE FLASH
internal
256-BYTE
DATA RAM
512-BYTE
AUXILIARY RAM
512-BYTE
DATA EEPROM
PORT 3
CONFIGURABLE I/Os
PORT 2
CONFIGURABLE I/Os
PORT 1
CONFIGURABLE I/Os
PORT 0
CONFIGURABLE I/Os
KEYPAD
INTERRUPT
WATCHDOG TIMER
AND OSCILLATOR
PROGRAMMABLE
CPU
OSCILLATOR DIVIDER
clock
CONFIGURABLE
OSCILLATOR
Rev. 03 — 7 June 2005
bus
REAL-TIME CLOCK/
SYSTEM TIMER
COMPARATORS
CCU (CAPTURE/
COMPARE UNIT)
POWER MONITOR
(POWER-ON RESET,
ON-CHIP
RC
BROWNOUT RESET)
OSCILLATOR
UM10119
P89LPC938 User manual
TXD
UART
RXD
SCL
2
I
C-BUS
SDA
SPICLK
MOSI
SPI
MISO
SS
T0
TIMER 0
TIMER 1
T1
CMP2
ANALOG
CIN2A
CIN1A
OCA
OCC
ICA
AD00
AD02
ADC0
AD04
AD06
002aab106
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
CIN2B
CMP1
CIN1B
OCB
OCD
ICB
AD01
AD03
AD05
AD07
9 of 139
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