USB84604 datasheet(35/61 Pages) MICROCHIP

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 2014-2016 Microchip Technology Inc.

DS60001295C-page 35

USB84604

7.2

I2C Master Interface

The I2C master interface implements a subset of the I2C Master Specification (Please refer to the Philips Semiconductor

Standard I2C-Bus Specification for details on I2C bus protocols) [ 5]. The device’s I2C master interface relates to the

Standard-Mode I2C Specification (i.e., roundabout 67 kbit/s transfer rate and 7-bit addressing) for protocol and electrical

properties. The device acts as the master and generates the serial clock SCL, controls the bus access (determines

which device acts as the transmitter and which device acts as the receiver), and generates the START and STOP con-

ditions.

7.2.1

PULL-UP RESISTORS FOR I2C

The circuit board designer is required to place external pull-up resistors (10 kΩ recommended) on the SDA & SCL sig-

nals (per SMBus 1.0 Specification) [ 6] to Vcc in order to assure proper operation.

FIGURE 7-5:

SPI JEDEC-ID READ SEQUENCE

Note:

Extensions to the I2C Specification are not supported.

Note:

All device configuration must be performed via the Microchip Protouch Programming Tool. For additional

information on the Protouch Programming Tool, contact your local Microchip sales representative. For the

latest version of the tool refer to the product page of the USB84604 on our web site at www.micro-

chip.com.

SPI_CE_N

SPI_CLK

SPI_DO

SPI_DI

MSB

HIGH IMPEDANCE

11 12 13 14 15 16

12 3 4

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

MSB

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