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USB5734 数据表(PDF) 26 Page - Microchip Technology

部件名 USB5734
功能描述  4-Port SS/HS USB Controller Hub
PDF  61 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

USB5734 数据表(HTML) 26 Page - Microchip Technology

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USB5734
DS00001854D-page 26
 2015-2016 Microchip Technology Inc.
3.4.5.6
Configuration 6 - Full UART Mode
When the CFG_STRAP is configured to this mode, the programmable function pins (PROG_FUNC[7:1]) are set for full
UART configuration and also provide an SMBus/I2C interface. In this mode the PROG_FUNCx pins are used in con-
junction with the UART_TX and UART_RX pins for a full UART interface. Table 3-21 details the PROG_FUNC[7:1] pin
assignments in this mode.
Note:
When flow control is disabled, UART_nCTS, UART_nDCD, and UART_nDSR must not be left floating. In
this case, these pins should include external pull-downs to maintain UART communication in Full UART
Mode with no flow control.
TABLE 3-21:
CONFIGURATION 6 PROG_FUNC[7:1] FUNCTION ASSIGNMENT
Pin
Function
Buffer
Type
Description
PROG_FUNC1
UART_nRTS
I/O12
UART Request To Send
PROG_FUNC2
UART_nCTS
I/O6
UART Clear To Send
PROG_FUNC3
UART_nDCD
I/O12
UART Data Carrier Detect
PROG_FUNC4
SMDAT
OD12
SMBus/I2C Data
The SMBus/I2C interface acts as SMBus slave or I2C bridge
dependent on the device configuration. Refer to Section 3.4.1,
"SPI/SMBus/I2C/UART Configuration (I2C_SLV_CFG[1:0])".
PROG_FUNC5
SMCLK
OD12
SMBus/I2C Clock
The SMBus/I2C interface acts as SMBus slave or I2C bridge
dependent on the device configuration. Refer to Section 3.4.1,
"SPI/SMBus/I2C/UART Configuration (I2C_SLV_CFG[1:0])".
PROG_FUNC6
UART_nDTR
I/O12
UART Data Terminal Ready
PROG_FUNC7
UART_nDSR
I/O10
UART Data Set Ready



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