P89LPC9321FN NXP Semiconductors, P89LPC9321FN Datasheet - Page 4

• Manufacturer Part Number: P89LPC9321FN
• Description: MCU 8-Bit 89LP 80C51 CISC 8KB Flash 2.5V/3.3V 28-Pin PDIP Tube
• Manufacturer: NXP Semiconductors

NXP Semiconductors
4. Block diagram
P89LPC9321_1
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
8 kB
Rev. 01 — 9 December 2008
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
COMPARE UNIT)
CCU (CAPTURE/
SYSTEM TIMER
COMPARATORS
ANALOG
I
TIMER 0
TIMER 1
2
(PGA1)
UART
C-BUS
SPI
P89LPC9321
002aae102
© NXP B.V. 2008. 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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