USB5926CSLASHKD datasheet(29/65 Pages) MICROCHIP

29 / 65 page



2019 - 2021 Microchip Technology Inc.

DS00003190B-page 29

USB5926C

7.0

DEVICE INTERFACES

The USB5926C provides multiple interfaces for configuration and external memory access. This section details the var-

ious device interfaces and their usage:

• SPI Master Interface

• SMBus Slave Interface

• I2C Bridge Interface

7.1

SPI Master Interface

The device is capable of code execution from an external SPI ROM. When configured for SPI Mode, on power up the

firmware looks for an external SPI flash device that contains a valid signature of 2DFU (device firmware upgrade) begin-

ning at address 0xFFFA. If a valid signature is found, then the external ROM is enabled and the code execution begins

at address 0x0000 in the external SPI device. If a valid signature is not found, then execution continues from internal

ROM.

7.2

SMBus Slave Interface

The device includes an integrated SMBus slave interface, which can be used to access internal device run time registers

or program the internal OTP memory. SMBus slave detection is accomplished by setting the

CFG_STRAP in the correct

configuration followed by detection of pull-up resistors on both the

SMDAT and SMCLK signals during the hub’s boot-

up sequence. Refer to Section 3.5.1, CFG_STRAP Configuration for additional information.

7.3

I2C Bridge Interface

The I2C Bridge 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). The I2C Bridge conforms to the Fast-Mode I2C Spec-

ification (400 kbit/s transfer rate and 7-bit addressing) for protocol and electrical compatibility. 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 conditions. The I2C Bridge interface fre-

quency is configurable through the I2C Bridging commands. I2C Bridge frequencies are derived from the formula

626KHz/n, where n is any integer from 1 to 256. Refer to Section 3.5.1, CFG_STRAP Configuration for additional infor-

mation.

Note:

For details on how to enable each interface, refer to Section 3.5, Configuration Straps and Programmable

Functions.

For information on device connections, refer to Section 4.0, Device Connections. For information on device

configuration, refer to Section 6.0, Device Configuration.

Microchip provides a comprehensive software programming tool, Pro-Touch2, for configuring the

USB5926C functions, registers and OTP memory. All configuration is to be performed via the Pro-Touch2

programming tool. For additional information on the Pro-Touch2 programming tool, refer to Software Librar-

ies within Microchip USB5926C product page at www.microchip.com/USB5926C.

Note:

For SPI timing information, refer to Section 10.6.7, SPI Timing.

Note:

All configuration is to be performed via the Pro-Touch2 programming tool. For additional information on the

Pro-Touch2 programming tool, refer to Software Libraries within Microchip USB5926C product page at

www.microchip.com/USB5926C.

Note:

Extensions to the I2C Specification are not supported.

All configuration is to be performed via the Pro-Touch2 programming tool. For additional information on the

Pro-Touch2 programming tool, refer to Software Libraries within Microchip USB5926C product page at

USB5926C/KD 数据表(PDF) 29 Page - Microchip Technology

USB5926C/KD 数据表(HTML) 29 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65

数据表下载

链接网址

USB5926C/KD 数据表(PDF) 29 Page - Microchip Technology

USB5926C/KD 数据表(HTML) 29 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65

数据表 下载

链接网址

数据表下载