ST STEVAL-PCC003V1, User Manual, Page: 18 / 29

Pin assignments UM0529
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Table 15 shows the pin description of the STUSB03 transceiver.
Pin no. Symbol I/O Name and function
13 VPU O
Pull-up supply voltage output. Used to connect 1.5 k
Ω
pull-up speed detect
resistor. If CON = 0, VPU is high impedance. If CON = 1, VPU = 3.3 V
±10%.
14 VBUS I
USB bus supply voltage (4 V to 5.5 V). Supplies power to the USB
transceiver and internal circuitry.
15 VIF I
System interface supply voltage (1.6 V To 3.6 V). Provides reference
supply voltage for system I/O interface signals.
16 VBUSDET O
VBUS indicator output. When VBUS > 2.9 V, VBUSDET = high and when
< 2.2 V, VBUSDET = low.
Table 14. Pin description for STUSB02E transceiver (continued)
Table 15. Pin description for STUSB03 transceiver
Pin no. Symbol I/O Name and function
1 SPD I
Edge rate control. A logic HIGH operates at edge rates for “full speed”
operation. A logic LOW operates edge rates for “low speed” operation.
2 RCV O Receive data. Output for USB differential data.
3 VP I/O
If OE# = H, VP = receiver output (+)
If OE# = L, VP = driver input (+)
4 VM I/O
If OE# = H, VM = receiver output (-)
If OE# = L, VM = driver input (-)
5 CON I
CONNECT (input). Controls state of VPU. Refer to VPU pin description for
detail.
6 GND Ground reference
7 SUS I Suspend (active-high). Turns off internal circuits to reduce supply current.
8 RSL I
Full speed pull-up resistor selection input. If RSEL = 0 the internal pull-up
resistor connected to D+ is disabled and an external resistor connected to
VPU
pin must be used.
9 OE# I
Output enable (active-low). Enables transceiver data transmission onto the
bus. When not active, the transceiver is in the receive mode.
10, 11 D-, D+ I/O Differential data lines.
12 VTRM O
3.3 V reference supply output. Requires a 1.0
µ
F decoupling capacitor for
stability.
13 VPU O
Pull-up supply voltage output. Used to connect 1.5 k
Ω
pull-up speed
detect resistor. If CON = 0, VPU is high impedance. If CON = 1, VPU = 3.3
V ±10%.
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