P89LPC9321 NXP Semiconductors, P89LPC9321 Datasheet - Page 4

• Manufacturer Part Number: P89LPC9321
• Description: The P89LPC9321 is a single-chip microcontroller, available in low cost packages, basedon a high performance processor architecture that executes instructions in two to fourclocks, six times the rate of standard 80C51 devices
• Manufacturer: NXP Semiconductors

NXP Semiconductors
4. Block diagram
P89LPC9321
Product data sheet
Fig 1.
Block diagram
RESONATOR XTAL2
CRYSTAL
P3[1:0]
P2[7:0]
P1[7:0]
P0[7:0]
OR
XTAL1
P89LPC9321
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
All information provided in this document is subject to legal disclaimers.
8 kB
Rev. 2 — 16 November 2010
ACCELERATED 2-CLOCK 80C51 CPU
8-bit microcontroller with accelerated two-clock 80C51 core
internal bus
CPU
clock
OSCILLATOR
WITH CLOCK
ON-CHIP RC
DOUBLER
(POWER-ON RESET,
BROWNOUT RESET)
REAL-TIME CLOCK/
POWER MONITOR
CCU (CAPTURE/
COMPARE UNIT)
SYSTEM TIMER
COMPARATORS
ANALOG
TIMER 0
TIMER 1
I
2
(PGA1)
UART
C-BUS
SPI
P89LPC9321
002aae102
© NXP B.V. 2010. All rights reserved.
TXD
RXD
SCL
SDA
SPICLK
MOSI
MISO
SS
T0
T1
CMP2
CIN2B
CIN2A
CMP1
CIN1A
CIN1B
OCA
OCB
OCC
OCD
ICA
ICB
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