参数资料
型号: P89LPC9361FDH,518
厂商: NXP Semiconductors
文件页数: 26/94页
文件大小: 0K
描述: IC MCU 80C51 16KB FLASH 28TSSOP
标准包装: 1
系列: LPC900
核心处理器: 8051
芯体尺寸: 8-位
速度: 18MHz
连通性: I²C,SPI,UART/USART
外围设备: 欠压检测/复位,POR,PWM,温度传感器,WDT
输入/输出数: 26
程序存储器容量: 16KB(16K x 8)
程序存储器类型: 闪存
EEPROM 大小: 512 x 8
RAM 容量: 768 x 8
电压 - 电源 (Vcc/Vdd): 2.4 V ~ 3.6 V
数据转换器: A/D 8x8b; D/A 2x8b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 28-TSSOP(0.173",4.40mm 宽)
包装: 标准包装
P89LPC9331_9341_9351_9361
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 5.1 — 20 August 2012
32 of 94
NXP Semiconductors
P89LPC9331/9341/9351/9361
8-bit microcontroller with accelerated two-clock 80C51 core
7.10 CCLK wake-up delay
The P89LPC9331/9341/9351/9361 has an internal wake-up timer that delays the clock
until it stabilizes depending on the clock source used. If the clock source is any of the
three crystal selections (low, medium and high frequencies) the delay is 1024 OSCCLK
cycles plus 60
sto100 s. If the clock source is the internal RC oscillator, the delay is
200
s to 300 s. If the clock source is watchdog oscillator or external clock, the delay is
32 OSCCLK cycles.
7.11 CCLK modification: DIVM register
The OSCCLK frequency can be divided down up to 510 times by configuring a dividing
register, DIVM, to generate CCLK. This feature makes it possible to temporarily run the
CPU at a lower rate, reducing power consumption. By dividing the clock, the CPU can
retain the ability to respond to events that would not exit Idle mode by executing its normal
program at a lower rate. This can also allow bypassing the oscillator start-up time in cases
where Power-down mode would otherwise be used. The value of DIVM may be changed
by the program at any time without interrupting code execution.
7.12 Low power select
The P89LPC9331/9341/9351/9361 is designed to run at 18 MHz (CCLK) maximum.
However, if CCLK is 8 MHz or slower, the CLKLP SFR bit (AUXR1.7) can be set to logic 1
to lower the power consumption further. On any reset, CLKLP is logic 0 allowing highest
performance access. This bit can then be set in software if CCLK is running at 8 MHz or
slower.
Fig 7.
Block diagram of oscillator control
÷2
002aad559
RTC
ADC1
ADC0
CPU
WDT
DIVM
CCLK
UART
OSCCLK
I2C-BUS
PCLK
TIMER 0 AND
TIMER 1
HIGH FREQUENCY
MEDIUM FREQUENCY
LOW FREQUENCY
XTAL1
XTAL2
RC OSCILLATOR
WITH CLOCK DOUBLER
WATCHDOG
OSCILLATOR
(7.3728 MHz/14.7456 MHz
± 1 %)
PCLK
RCCLK
SPI
CCU
(P89LPC9351/9361)
32
× PLL
(400 kHz
± 5 %)
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