USB5734 Datasheet, PDF (22/61 Pages) Microchip Technology – 4-Port SS/HS USB Controller Hub

USB5734
3.4.5.3 Configuration 3 - Speed Indicator Mode
When the CFG_STRAP is configured to this mode, the programmable function pins (PROG_FUNC[7:1]) are set to indi-
cate speed status, host type, and provide an SMBus/I²C interface. Table 3-18 details the PROG_FUNC[7:1] pin assign-
ments in this mode.
TABLE 3-18: CONFIGURATION 3 PROG_FUNC[7:1] FUNCTION ASSIGNMENT
Pin
PROG_FUNC1
PROG_FUNC2
PROG_FUNC3
PROG_FUNC4
PROG_FUNC5
PROG_FUNC6
PROG_FUNC7
Function
SPEED_IND1
SPEED_IND2
SPEED_IND3
SMDAT
SMCLK
SPEED_IND4
HOST_TYPE
Buffer
Type
O12
O6
O12
OD12
OD12
O12
O10
Description
Port 1 Speed Indicator
Tri-state: Not connected
0: USB 2.0 / USB 1.1
1: USB 3.1 Gen 1
Port 2 Speed Indicator
Tri-state: Not connected
0: USB 2.0 / USB 1.1
1: USB 3.1 Gen 1
Port 3 Speed Indicator
Tri-state: Not connected
0: USB 2.0 / USB 1.1
1: USB 3.1 Gen 1
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])".
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])".
Port 4 Speed Indicator
Tri-state: Not connected
0: USB 2.0 / USB 1.1
1: USB 3.1 Gen 1
Port 0 USB Host Type
Tri-state: No USB host detected on Port 0
0: USB 3.1 Gen 1 Host detected on Port 0
1: USB 2.0 or USB 1.1 Host detected on Port 0
A USB 2.0 Host is considered detected when the USB 2.0 hub
address register holds a non-zero value. A USB 3.1 Gen 1
Host is considered detected when the USB 3.1 Gen 1 hub
address register holds a non-zero value.
DS00001854D-page 22
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