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| 型号： | PCA9685PW/Q900,118 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 13/51页 |
| 文件大小： | 0K |
| 描述： | IC PWM CTLR LED DVR 28TSSOP |
| 产品培训模块： | I²C Bus Fundamentals |
| 标准包装： | 1 |
| 拓扑： | 开路漏极，PWM |
| 输出数： | 16 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光，LED 闪烁器 |
| 类型 - 次要： | RGBA |
| 频率： | 25MHz，50MHz |
| 电源电压： | 2.3 V ~ 5.5 V |
| 输出电压： | 5.5V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 28-TSSOP |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 85°C |
| 其它名称： | 568-5931-6 |
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NXP Semiconductors
PCA9685
16-channel, 12-bit PWM Fm+ I 2 C-bus LED controller
7.3.1 Mode register 1, MODE1
Table 4. MODE1 - Mode register 1 (address 00h) bit description
Legend: * default value.
Bit
7
Symbol
RESTART
Access
R
Value
Description
Shows state of RESTART logic. See Section 7.3.1.1 for detail.
W
0*
1
User writes logic 1 to this bit to clear it to logic 0. A user write of logic 0 will have no
effect. See Section 7.3.1.1 for detail.
Restart disabled.
Restart enabled.
6
EXTCLK
R/W
To use the EXTCLK pin, this bit must be set by the following sequence:
refresh _ rate = -------------------------------------------------------
1. Set the SLEEP bit in MODE1. This turns off the internal oscillator.
2. Write logic 1s to both the SLEEP and EXTCLK bits in MODE1. The switch is
now made. The external clock can be active during the switch because the
SLEEP bit is set.
This bit is a ‘sticky bit’, that is, it cannot be cleared by writing a logic 0 to it. The
EXTCLK bit can only be cleared by a power cycle or software reset.
EXTCLK range is DC to 50 MHz.
EXTCLK
4096 × ( prescale + 1 )
0*
1
Use internal clock.
Use EXTCLK pin clock.
5
AI
R/W
0*
Register Auto-Increment disabled [1] .
1
Register Auto-Increment enabled.
4
SLEEP
R/W
0
Normal mode [2] .
1*
Low power mode. Oscillator off [3][4] .
3
SUB1
R/W
0*
PCA9685 does not respond to I 2 C-bus subaddress 1.
1
PCA9685 responds to I 2 C-bus subaddress 1.
2
SUB2
R/W
0*
PCA9685 does not respond to I 2 C-bus subaddress 2.
1
PCA9685 responds to I 2 C-bus subaddress 2.
1
SUB3
R/W
0*
PCA9685 does not respond to I 2 C-bus subaddress 3.
1
PCA9685 responds to I 2 C-bus subaddress 3.
0
ALLCALL
R/W
0
PCA9685 does not respond to LED All Call I 2 C-bus address.
1*
PCA9685 responds to LED All Call I 2 C-bus address.
[1]
[2]
[3]
[4]
When the Auto Increment flag is set, AI = 1, the Control register is automatically incremented after a read or write. This allows the user
to program the registers sequentially.
It takes 500 μ s max. for the oscillator to be up and running once SLEEP bit has been set to logic 0. Timings on LEDn outputs are not
guaranteed if PWM control registers are accessed within the 500 μ s window. There is no start-up delay required when using the
EXTCLK pin as the PWM clock.
No PWM control is possible when the oscillator is off.
When the oscillator is off (Sleep mode) the LEDn outputs cannot be turned on, off or dimmed/blinked.
PCA9685
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 2 September 2010
? NXP B.V. 2010. All rights reserved.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PCA9691BS/1 | 制造商:NXP Semiconductors 功能描述:IC ADC/DAC 8-BIT I2C 16-HVQFN 制造商:NXP Semiconductors 功能描述:IC, ADC/DAC, 8-BIT, I2C, 16-HVQFN |
| PCA9691BS/1,118 | 功能描述:I2C 接口集成电路 ADC/DAC 16-Pin HVQFN EP RoHS:否 制造商:NXP Semiconductors 电源电压-最大:5.5 V 电源电压-最小:2.3 V 最大工作频率:400 KHz 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-16 |
| PCA9691BS/1118 | 制造商:NXP Semiconductors 功能描述:PCA9691BS/HVQFN16/REEL13//1 |
| PCA9691T/1，112 | 制造商:NXP Semiconductors 功能描述: |
| PCA9691T/1，118 | 制造商:NXP Semiconductors 功能描述: |
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