参数资料
型号: P89LPC9361FDH,518
厂商: NXP Semiconductors
文件页数: 38/94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
43 of 94
NXP Semiconductors
P89LPC9331/9341/9351/9361
8-bit microcontroller with accelerated two-clock 80C51 core
7.22.7 Alternating output mode
In asymmetrical mode, the user can set up PWM channels A/B and C/D as alternating
pairs for bridge drive control. In this mode the output of these PWM channels are
alternately gated on every counter cycle.
7.22.8 PLL operation
The PWM module features a Phase Locked Loop that can be used to generate a
CCUCLK frequency between 16 MHz and 32 MHz. At this frequency the PWM module
provides ultrasonic PWM frequency with 10-bit resolution provided that the crystal
frequency is 1 MHz or higher. The PLL is fed an input signal from 0.5 MHz to 1 MHz and
generates an output signal of 32 times the input frequency. This signal is used to clock the
timer. The user will have to set a divider that scales PCLK by a factor from 1 to 16. This
divider is found in the SFR register TCR21. The PLL frequency can be expressed as
shown in Equation 1:
(1)
Where: N is the value of PLLDV3:0.
Fig 10. Symmetrical PWM
TOR2
compare value
timer value
non-inverted
inverted
002aaa894
0
Fig 11. Alternate output mode
TIMER VALUE
002aaa895
0
TOR2
COMPARE VALUE A (or C)
COMPARE VALUE B (or D)
PWM OUTPUT (OCA or OCC)
PWM OUTPUT (OCB or OCD)
PLL frequency
PCLK
N1
+
------------------
=
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