STEVAL-PCC004V1 STMicroelectronics, STEVAL-PCC004V1 Datasheet - Page 8

• Manufacturer Part Number: STEVAL-PCC004V1
• Description: BOARD EVAL USB STUSB02E/ST72F63B
• Manufacturer: STMicroelectronics

Specifications of STEVAL-PCC004V1

• Main Purpose: Interface, USB 2.0 Slave
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: STUSB02E, ST72F63B
• Primary Attributes: Low Speed (1.5Mbps)
• Secondary Attributes: GUI of HID, ESD Protection
• Processor To Be Evaluated: ST72F63BE2
• Data Bus Width: 8 bit
• Interface Type: USB
• Silicon Manufacturer: ST Micro
• Silicon Core Number: STUSB02E, ST7263BE2
• Kit Contents: Board CD Docs
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-8209; STEVAL-PCC004V1

Evaluation board hardware
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Evaluation board hardware
All the hardware components except the transceiver IC are the same for the STUSB02E and
STUSB03 evaluation boards. The evaluation boards are comprised of one mini-B USB
connector, one USB controller, one USB transceiver, two 2-to-4 demultiplexers and all
required discrete components (pull-up resistors, series resistors and power supply
capacitors). The device can be configured through a set of jumpers and the main signals
can be accessed through test points.
The evaluation board is powered from a USB mini-B or optionally from an external supply.
The transceiver STUSB02EQR/ STUSB03EQR is connected at the USB communication
lines of the microcontroller. The USBVCC 3.3 V is obtained from the controller for providing
the VIF to the transceiver and also the supply to 74LCX139. Since the ST72F63B is a USB
low-speed microcontroller, therefore the pull-up resistor is connected to the D- pin of the
transceiver. Hence, STUSB02E / STUSB03 acts as a low-speed transceiver. Also the SPD
pin of the transceiver is connected to GND for low-speed selection.
The 74LCX139MTR is used to convert 5 V signals from the microcontroller to 3.3 V signals
to STUSB02E/STUSB03E. This device is used because some signals need polarity
conversion whereas other signals just need the level conversion. This is explained in
Section 3.3: 74LCX139MTR low voltage dual 2-to-4 decoder/demultiplexer
Figure 3.
ST72F63B
Controller
USB
Switches
LEDs
U1
STUSB02E/ STUSB03 evaluation board block diagram
Signals
at 5V
74LCX139MTR
74LCX139MTR
U2
U3
Signals
at 3.3V
Power pins (V
Transceiver
STUSB02E/
Configuration
STUSB03E
USB LS
Jumpers
U5
BUS
, V
IF
)
V
U2,U3.
BUS
, DP, DM
connector
Mini-B
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