参数资料
型号: LPC11U23FBD48/301,
厂商: NXP Semiconductors
文件页数: 49/74页
文件大小: 0K
描述: MCU USB 48LQFP
产品培训模块: Code Density for LPC11xx
标准包装: 250
系列: LPC11Uxx
核心处理器: ARM? Cortex?-M0
芯体尺寸: 32-位
速度: 50MHz
连通性: I²C,Microwire,SPI,SSI,SSP,UART/USART,USB
外围设备: 欠压检测/复位,POR,WDT
输入/输出数: 40
程序存储器容量: 24KB(24K x 8)
程序存储器类型: 闪存
EEPROM 大小: 1K x 8
RAM 容量: 8K x 8
电压 - 电源 (Vcc/Vdd): 1.8 V ~ 3.6 V
数据转换器: A/D 8x10b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 48-LQFP
包装: 托盘
其它名称: 568-8520
LPC11U23FBD48/301,-ND
LPC11U2X
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2014. All rights reserved.
Product data sheet
Rev. 2.2 — 11 March 2014
53 of 74
NXP Semiconductors
LPC11U2x
32-bit ARM Cortex-M0 microcontroller
For a bus-powered device, the VBUS signal does not need to be connected to the
USB_VBUS pin (see Figure 28). The USB_CONNECT function can additionally be
connected as shown in Figure 27 to prevent the USB from timing out when there is a
significant delay between power-up and handling USB traffic.
Remark: When a bus-powered circuit as shown in Figure 28 is used, configure the
PIO0_3/USB_VBUS pin for GPIO (PIO0_3) in the IOCON block to ensure that the
USB_CONNECT signal can still be controlled by software. For details on the soft-connect
feature, see the LPC11U2x user manual (Ref. 1).
Remark: When a self-powered circuit is used without connecting VBUS, configure the
PIO0_3/USB_VBUS pin for GPIO (PIO0_3) and provide software that can detect the host
presence through some other mechanism before enabling USB_CONNECT and the
soft-connect feature. Enabling the soft-connect without host presence will lead to USB
compliance failure.
11.2 XTAL input
The input voltage to the on-chip oscillators is limited to 1.8 V. If the oscillator is driven by a
clock in slave mode, it is recommended that the input be coupled through a capacitor with
Ci = 100 pF. To limit the input voltage to the specified range, choose an additional
capacitor to ground Cg which attenuates the input voltage by a factor Ci/(Ci + Cg). In slave
mode, a minimum of 200 mV (RMS) is needed.
Fig 28. USB interface on a bus-powered device
LPC1xxx
VDD
R1
1.5 kΩ
aaa-010179
USB-B
connector
USB_DP
USB_DM
VSS
RS = 33 Ω
REGULATOR
VBUS
相关PDF资料
PDF描述
1734028-2 CONN USB PLUG R/A SMD NATURAL
787617-6 CONN DUAL 4POS USB TYPE A R/A
787617-5 CONN DUAL 4POS USB TYPE A R/A
787617-4 CONN DUAL 4POS USB TYPE A R/A
787617-3 CONN DUAL 4POS USB TYPE A R/A
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