UPSD3422EV-40U6 STMicroelectronics, UPSD3422EV-40U6 Datasheet - Page 294

• 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

Important notes
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Important notes
The following sections describe the limitations that apply to the UPSD34xx devices and the
differences between revision A and B silicon.
USB interrupts with idle mode
Description
An interrupt generated by a USB related event does not bring the MCU out of idle mode for
processing.
Impact on application
Idle mode cannot be used with USB.
Workaround
Revision A - None identified at this time.
Revision B - Corrected in silicon so that a USB interrupt that occurs will bring the MCU out of
idle mode.
USB reset interrupt
Description
When the MCU clock prescaler is set to a value other than f
signal on the USB does not cause a USB interrupt to be generated.
Impact on application
An MCU clock other than that equal to the frequency of the oscillator cannot be used.
Workaround
Revision A - The CPUPS field in the CCON0 register must be set to 000b (default after
reset). The 3400 USB firmware examples set CCON0 register to 000b.
Revision B - Corrected in silicon so that when an MCU clock prescaler is used, a reset
signal on the USB does generate an interrupt.
USB reset
Description
A USB reset does not reset the USB SIE's registers.
Impact on application
A USB reset does not reset the USB SIE's registers as does a power-on or hardware reset.
UPSD3422, UPSD3433, UPSD3434, UPSD3454
MCU
= f
OSC
(no division), a reset