p89lpc972fn NXP Semiconductors, p89lpc972fn Datasheet - Page 4

• Manufacturer Part Number: p89lpc972fn
• Description: 8-bit Microcontroller With Accelerated Two-clock 80c51 Core 2kb/4 Kb/8 Kb Wide-voltage Byte-erasable ?ash
• Manufacturer: NXP Semiconductors

NXP Semiconductors
4. Block diagram
P89LPC97X_1
Preliminary data sheet
Fig 1.
(1) For pin remap
RESONATOR XTAL2
Block diagram
CRYSTAL
P3[1:0]
P1[7:0]
P0[7:0]
OR
XTAL1
P89LPC970/971/972
OSCILLATOR DIVIDER
CONFIGURABLE I/Os
CONFIGURABLE I/Os
CONFIGURABLE I/Os
WATCHDOG TIMER
PROGRAMMABLE
AND OSCILLATOR
CONFIGURABLE
2 kB/4 kB/8 kB
CODE FLASH
OSCILLATOR
INTERRUPT
DATA RAM
256-BYTE
KEYPAD
PORT 3
PORT 1
PORT 0
Rev. 01 — 17 December 2009
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
P89LPC970/971/972
POWER MANAGEMENT
(POWER-ON RESET,
BROWNOUT RESET,
REAL-TIME CLOCK/
SYSTEM TIMER
COMPARATORS
REGULATORS)
ANALOG
I
TIMER 0
TIMER 1
TIMER 2
TIMER 3
TIMER 4
2
UART
C-BUS
SPI
002aae550
© NXP B.V. 2009. All rights reserved.
TXD
RXD
SCL
SDA
SPICLK
MOSI
MISO
SS
T0
T1
T2
T2EX
T3
T3EX
T4
T4EX
CMP2
CIN2B
CIN2A
CMP1
CIN1A
CIN1B
(1)
(1)
(1)
(1)
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