参数资料
型号: PCA9633TK,118
厂商: NXP Semiconductors
文件页数: 17/43页
文件大小: 0K
描述: IC LED DRIVER RGBA 8-HVSON
标准包装: 1
拓扑: 开路漏极,PWM
输出数: 4
内部驱动器: 两者兼有
类型 - 主要: 背光,LED 闪烁器
类型 - 次要: RGBA
频率: 25MHz
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: 8-VFDFN 裸露焊盘
供应商设备封装: 8-HVSON
包装: 剪切带 (CT)
工作温度: -40°C ~ 85°C
配用: OM6276,598-ND - DEMO BOARD PWM LED
622-1004-ND - BOARD DEMO FOR PHILIPS PCA9633
其它名称: 568-3239-1
NXP Semiconductors
PCA9633
4-bit Fm+ I 2 C-bus LED driver
7.6 Software Reset
The Software Reset Call (SWRST Call) allows all the devices in the I 2 C-bus to be reset to
the power-up state value through a speci?c formatted I 2 C-bus command. To be performed
correctly, it implies that the I 2 C-bus is functional and that there is no device hanging the
bus.
The SWRST Call function is de?ned as the following:
1. A START command is sent by the I 2 C-bus master.
2. The reserved SWRST I 2 C-bus address ‘0000 011’ with the R/W bit set to 0 (write) is
sent by the I 2 C-bus master.
3. The PCA9633 device(s) acknowledge(s) after seeing the SWRST Call address
‘0000 0110’ (06h) only. If the R/W bit is set to 1 (read), no acknowledge is returned to
the I 2 C-bus master.
4. Once the SWRST Call address has been sent and acknowledged, the master sends
2 bytes with 2 speci?c values (SWRST data byte 1 and byte 2):
a. Byte 1 = A5h: the PCA9633 acknowledges this value only. If byte 1 is not equal to
A5h, the PCA9633 does not acknowledge it.
b. Byte 2 = 5Ah: the PCA9633 acknowledges this value only. If byte 2 is not equal to
5Ah, then the PCA9633 does not acknowledge it.
If more than 2 bytes of data are sent, the PCA9633 does not acknowledge any more.
5. Once the right 2 bytes (SWRST data byte 1 and byte 2 only) have been sent and
correctly acknowledged, the master sends a STOP command to end the SWRST Call:
the PCA9633 then resets to the default value (power-up value) and is ready to be
addressed again within the speci?ed bus free time (t BUF ).
The I 2 C-bus master must interpret a non-acknowledge from the PCA9633 (at any time) as
a ‘SWRST Call Abort’. The PCA9633 does not initiate a reset of its registers. This
happens only when the format of the SWRST Call sequence is not correct.
PCA9633_5
? NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 05 — 25 July 2008
17 of 43
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