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| 型号： | PCA9533DP/02,118 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 5/24页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER RGB 8-TSSOP |
| 标准包装： | 1 |
| 拓扑： | 开路漏极，PWM |
| 输出数： | 4 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光，LED 闪烁器 |
| 类型 - 次要： | RGB |
| 频率： | 400kHz |
| 电源电压： | 2.3 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-TSSOP |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 85°C |
| 配用： | 568-4003-ND - DEMO BOARD LED DIMMER 568-3512-ND - DEMO BOARD UART TO I2C |
| 其它名称： | 568-3375-6 |
NXP Semiconductors
PCA9533
4-bit I 2 C-bus LED dimmer
6.2.1 Control register de?nition
Table 4.
Register summary
B2
0
0
0
0
1
1
B1
0
0
1
1
0
0
B0
0
1
0
1
0
1
Symbol
INPUT
PSC0
PWM0
PSC1
PWM1
LS0
Access
read only
read/write
read/write
read/write
read/write
read/write
Description
input register
frequency prescaler 0
PWM register 0
frequency prescaler 1
PWM register 1
LED selector
6.3 Register descriptions
6.3.1 INPUT - Input register
The INPUT register re?ects the state of the device pins. Writes to this register will be
acknowledged but will have no effect.
Table 5.
INPUT - Input register description
Bit
Symbol
Default
7
-
0
6
-
0
5
-
0
4
-
0
3
LED3
X
2
LED2
X
1
LED1
X
0
LED0
X
Remark: The default value ‘X’ is determined by the externally applied logic level (normally
logic 1) when used for directly driving LED with pull-up to V DD .
6.3.2 PCS0 - Frequency Prescaler 0
PSC0 is used to program the period of the PWM output.
The period of BLINK0 = (PSC0 + 1) / 152.
Table 6.
PSC0 - Frequency Prescaler 0 register description
Bit
Symbol
Default
7
PSC0[7]
0
6
PSC0[6]
0
5
PSC0[5]
0
4
PSC0[4]
0
3
PSC0[3]
0
2
PSC0[2]
0
1
PSC0[1]
0
0
PSC0[0]
0
6.3.3 PWM0 - Pulse Width Modulation 0
The PWM0 register determines the duty cycle of BLINK0. The outputs are LOW (LED on)
when the count is less than the value in PWM0 and HIGH (LED off) when it is greater. If
PWM0 is programmed with 00h, then the PWM0 output is always HIGH (LED off).
The duty cycle of BLINK0 = PWM0 / 256.
Table 7.
PWM0 - Pulse Width Modulation 0 register description
Bit
Symbol
Default
7
PWM0
[7]
1
6
PWM0
[6]
0
5
PWM0
[5]
0
4
PWM0
[4]
0
3
PWM0
[3]
0
2
PWM0
[2]
0
1
PWM0
[1]
0
0
PWM0
[0]
0
PCA9533_3
? NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 03 — 27 April 2009
5 of 24
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