NXP Semiconductors OM13260, Руководство по установке, Страница: 30 / 71

NXP Semiconductors
UMxxxxx
Install Guide
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Preliminary 1
— September 6, 2013
© NXP B.V. 2013. All rights reserved.
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Table 5.1 LED Driver Address Selection
HEX 8-bit NXP 7-bit
MSB LSB MSB LSB
GND 0xC0 1100 0000 0x60 0110 0000
VCC 0xD0 1101 0000 0x68 0110 1000
5.3.4 GPIO Slave (PCA9672)
The GPIO (PCA9672, IC10) is connected to Bus1, and provides eight input/output channels at CN10.
Jumper JP10 sets the device address to one of four options depending whether the A0 pin is connected
to GND, VCC, SCL, or SDA. Bus2 has a similar arrangement for a second GPIO (PCA9672, IC20). See
figure 5.14 and 5.15.
Note: The PCB is marked with Hex (8-bit) address data, but datasheets and the NXP GUI use the 7-bit
address values.
This is summarized in table 5.2
Fig 5.14 Bus1 GPIO 8 bit
Table 5.2 GPIO Address Selection
HEX 8-bit NXP 7-bit
MSB LSB MSB LSB
GND 0x44 0100 0100 0x22 0010 0010
VCC 0x46 0100 0110 0x23 0010 0011
SCL 0x54 0101 0100 0x2A 0010 1010
SDA 0x56 0101 0110 0x2B 0010 1011