UPSD3422EV-40U6 STMicroelectronics, UPSD3422EV-40U6 Datasheet - Page 177

• Manufacturer Part Number: UPSD3422EV-40U6
• Description: MCU 8BIT 8032 64KB FLASH 80TQFP
• Manufacturer: STMicroelectronics
• Series: µPSDr

Specifications of UPSD3422EV-40U6

• Core Processor: 8032
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, IrDA, SPI, UART/USART, USB
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 46
• Program Memory Size: 80KB (80K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TQFP, 80-VQFP
• For Use With: 497-5577 - BOARD EVAL USB POWER SWITCH497-5518 - EVAL BOARD RFID READER
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Other names: 497-4905

UPSD3422, UPSD3433, UPSD3434, UPSD3454
25.5
Typical connection to USB
Connecting the UPSD34xx to the USB is simple and straightforward.
typical self-powered example requiring only three resistors and a USB power detection
circuit. The USB power detection circuit detects when the device has been connected to the
USB. When V
USB specification, the pull-up resistor on D+ is required to signal to the upstream USB port
when a full speed device has been connected to the bus. The resistors in series in the D+
and D– lines are recommended per the USB specification to reduce transients on the data
lines.
Figure 55. Typical self powered example
BUS
is detected, it switches 3.3 V to the pull-up resistor on the D+ line. Per the
USB
V BUS
GND
D–
D+
detection block
USB power
V CC
+3.3V
1.5KΩ
22Ω
22Ω
USB–
USB+
GND
V CC
V CC
uPSD34xx
Figure 55
V DD
V DD
AI10495
USB interface
shows a
177/300